Sürdürülebilir Kalkınma Amaçları

Yazarlar

  • MakaleYalnız künye2014
    Taşrada varoluş: hasan ali toptaş'ın gölgesizler romanı üzerine bir inceleme

    Öner, Haluk

    Son dönem Türk romanında nitelik ve nicelik bakımından yaşanan yükseliş okurları seçici bir tavır takınmaya zorlamaktadır. Romanların sayıca çokluğu, romanlardaki posmodernist etkilerin artışı da farklı okur profillerinin ortaya çıkmasına neden olmuştur. Hasan Ali Toptaş, hem nitelikli okur profilinin ortaya çıkmasına yardım eden hem de roman Türk edebiyatında roman türünün gelişimine katkıda bulunan önemli bir yazardır. Son dönem Türk romanında üslubu ve kurgulama biçimleriyle kendine önemli bir yer edinmiş, yazmakla yaşamak arasında doğal bağlar kurmuş bir romancıdır. Gölgesizler, Bin Hüzünlü Haz, Heba, Uykuların Doğusu gibi eserlerinde "Doğu"lu olmanın, Modernizm'in, Postmodernizm'in, varoluşçu sorgulamalarının, büyülü gerçekçiliğin izlerini görmek bu konularda yazılmış çeşitli makaleleri okumak mümkündür. Bu makale Hasan Ali Toptaş romanları arasında çok anlamlılığı ve çok boyutluluğu ile önemli bir yer tutan Gölgesizler romanına genel bir bakışı içermektedir. Kurgulanışı, taşıdığı modernist ve postmodernist unsurları, şiirsel dili, mekân ve karakter betimlemeleri, iç içe geçmiş parçacıkları birleştiren bütünlüklü yapısı ile ele alınan Gölgesizler romanı son dönem Tük romanı için önemli bir gelişim hamlesi olarak kabul edilmelidir. Bu makalede Gölgesizler romanının Türk romanı için hangi açılardan önemli olduğu üzerinde durulacak, kurgu ve anlatım biçiminin incelikleri hakkında ayrıntı verilecektir.

    AtıfTR Dizin1
    TR Dizinİncele
  • MakaleYalnız künye2014
    Sentence types and subordinate clause in terms of structure

    Tosun, İbrahim; Koç, Ali

    Sentence in the language known as judicial units in terms of the location of the item is founded as discrete from language to language, they are similar in terms of the elements of these organizations. Therefore, each of the sentences in the language definition, functions and duties are the same. Due to this fact and sentence classification criteria taken into account in the analysis can be applied to sentences in all languages is becoming a universal character. In the language of this general, universal properties of specific methods of sentence analysis has led to the emergence and of theoretical. Noam Chomsky's “Manufacturer Transformational Grammar Theory” of sentences and other grammatical categories are similar in all languages of the property, is based on universality. Many studies have been made on the topic sentence in Turkish so far. Although a substantial part of these studies is related to the types of sentence and syntactic order of sentence, some of them handle general grammar of Turkish and give place to the sentence. Despite the multitude of studies, all aspects of the subject in Turkish sentence have not been clarified yet. Especially sentences in terms of structure and on terms that form this area have not provided a complete unity. The most controversial issues of this area are the status of the subordinate clause installed with verbals, simple and compound sentences, sequential sentence and top units of sentences. Taking into account the differences of opinion that is stil ongoing in these issues, in this study, the sentences in terms of structure on the basis of what has been said until now, a collective assessment about sentence structure has been studied. Despite opposing views and conflicting statements, widely

    AtıfTR Dizin4
    TR Dizinİncele
  • MakaleYalnız künye2014
    A text lınguıstıcs approach to the short story “sınağrıt baba” by saıt faık

    Tosun, İbrahim

    “Text” is a term frequently used both in literature and linguistics. Although there are slightly different definitions of the word, it is commonly agreed that there are certain criteria to being a text. Text linguists agree that a text must have coherence, consistency, intentionality, admissibility, contingency, informativity and intertextual connection. In the field of textual analysis, text linguistics and functional grammar aim to determine consistency relations and how paragraph structure can be designed through patterns of plot development. The two most important criteria in determining textuality and analyzing a text are coherence and consistency, which are also known as small and big scale structures. Linguistic regulations that create coherence in a small scale structure are used to show the development of the plot which enables the creation of general meaning in a big scale structure. For this reason, analysing texts in ‘structural’, ‘meaningful’ and ‘functional’ terms necessitate analyses through big scale criteria. In the present study titled “A Text Linguistics Approach to the Short Story Sinağrit Baba by Sait Faik, structuring of the text in surface structure or in other words its structural characteristics will be investigated in terms of coherence and the characteristics that reflect the general meaning of the text in the deep structure and constitute the contents of the text will be investigated in terms of consistency. How textual linguistic coherence and consistency are realized in the text in the short story “Sinağrit Baba” will be evaluated with examples from the story

    AtıfTR Dizin2
    TR Dizinİncele
  • MakaleYalnız künye2014
    Some Population Parameters of Capoeta trutta (Heckel, 1843) in Uzunçayır Dam Lake (Tunceli)

    Yüksel, Fahrettın; Demyrol, Ferhat; Kurto?lu, Mehtap; Çoban, M. Zülfü; Yildiz, Nurettin; Gündüz, Fatih

    This study was carried out in Uzunçayır Dam Lake between May 2011—September 2012. total of 349 individuals (222 male, 127 female) of Capoeta trutta (Heckel, 1843) investigated in study, samples was determined which ranged between l-XII age groups and male/female ratio was determined to be 0.57. Total length values ranged from 17.2 to 41 cm for males, from 21.4 to 43 .1 cm for females; weight values ranged from 48.0 to 612.0 for males, from 86.0—747.0 for females; condition factor values ranged from 0.65 to 1.297 for males and from 0.627 to .433 for females. However, length—weight relationship equation was determined as W: 0.0096TL2'9856 (R2 0.93) for males, W: 0.0052TL3'1644 (R2 0.93) females and W: 0.0082TL3'0327 (R2:0.94) for all population. The VBBD parameters were found L,: 49.58, K: 0.09, to: -4.00, W7 1109.06 and natural mortality rate (M) 0.236 for all population.

    AtıfTR Dizin3
    TR Dizinİncele
  • Proje2014
    Gökkuşağı alabalığı (oncorhynchus mykiss) nın sperm kriyoprezervasyonunda (dondurulması) antioksidanların kullanılması, sperm kalite parametrelerinin, yağ asidi, protein profillerinin ve seminal plazma kompozisyonunun belirlenmesi

    Yavas, Ilker; Öğretmen, Fatih; Kayim, Murathan; Tuncer, Pürhan Barbaros

    -

  • Proje2014
    Uzunçayır Baraj Gölü’nün Fitoplankton Türleri ve Fiziko- Kimyasalar Parametrelerinin Belirlenmesi

    Serdar, Osman; Kutlu, Banu; Aydin, Rahmi; Danabaş, Durali

    Uzunçayır Baraj Gölü fitoplankton dagılımı ve fiziko-kimyasal parametreleri, Mayıs 2013?Nisan 2014 tarihleri arasında incelenmis olup, elde edilen veriler tablo ve grafikler halinde sunularak, istatistiksel analizlerle degerlendirilmistir. Arastırma süresince Uzunçayır Baraj Gölü?nde sıcaklık 6,2-27,3°C; sechii disk derinligi 0,81- 11,09 m arasında; klorofil-a miktarı yüzey istasyonlarında 0-72,343 μg/L arasında; yüzey suyunda pH degeri 6,43-9; fosfor degeri yüzeyde 0-0,94 mg/L ve toplam sertlik degeri yüzeyde 90-218 mg/L arasında ölçülmüstür. ?Su Kirliligi Kontrol Yönetmeligi??ne göre Uzunçayır Baraj Gölü suyu, sıcaklık, pH, çözünmüs oksijen, nitrit azotu degerlerine göre II. sınıf su grubuna, nitrat azotu degerlerine göre ise kirlenmemis sular grubuna girmektedir. Uzunçayır Baraj Gölü?nde, Ochrophyta divizyonu (31 tür), Charophyta divizyonu (4 tür), Chlorophyta divizyonu (3 tür), Cyanobacteria (4 tür), Dinophyta divizyonu (9 tür), Euglenophyta divizyonu (2 tür) ait taksonlar tespit edilmistir. Shannon-Wiener çesitlilik analizine göre çesitlilik indeksi degerleri yüzeyde 0,48-2,48 arasında saptanmıstır. Bu degerlere göre göl suyu ?kirlenmemis ve kısmen kirlenmis alanlar? grubuna girmektedir. Uzunçayır Baraj Gölü morfometrik yapısı, su derinliginin fazla olması, klorofil-a ve toplam fosfor degerlerine göre oligotrof bir göl gibi görünse de fitoplankton yapısı, sechii diski diski derinligi ve bilesik indis degerlerine göre mezotrof bir göl olma özelligi göstermektedir

  • MakaleYalnız künye2014Scopus SJRQ4
    Production of Lipase by P. fluorescens (NRLL B-2641) under Submerged Fermentation Conditions

    Tanyol, Mehtap; Uslu, Gulsad

    Lipases are industrially important enzymes produced by a great variety of microorganisms. In this study, the production of extracellular lipase by Pseudomonas fluorescens (NRLL B-2641) using submerged fermentation was studied: The effects of. initial pH, carbon source, nitrogen source and metal ion addition on lipase activity were investigated using batch experiments. The highest enzyme activity and biomass production obtained were 2.50 U mL(-1) and 2.95 g cell dry wt. L-1, respectively, using a fermentation medium with 1% corn oil as the carbon source, 0.4% peptone as the nitrogen source and an initial pH of 6.0. The addition of calcium increased the enzyme activity to 3.30 U mL(-1). Thus, initial lipase activity, which was 0.92 U mL(-1), increased 356%. Partial characterization of crude lipase was performed to determine the optimum pH and temperature. The crude lipase displayed high activities at pH 6.0-8.5 and 35-65 degrees C, with maximum activity at pH 8.0 and 50 degrees C.

  • MakaleYalnız künye2014Scopus SJRQ3
    EXPLORING THE OPTIMUM CONDITIONS FOR MAXIMIZING THE MICROBIAL GROWTH OF Candida intermedia BY RESPONSE SURFACE METHODOLOGY

    Yönten, Vahap; Aktas, Nahit

    Exploring optimum and cost-efficient medium composition for microbial growth of Candida intermedia Y-1981 yeast culture growing on whey was studied by applying a multistep response surface methodology. In the first step, Plackett-Burman (PB) design was utilized to determine the most significant fermentation medium factors on microbial growth. The medium temperature, sodium chloride and lactose concentrations were determined as the most important factors. Subsequently, the optimum combinations of the selected factors were explored by steepest ascent (SA) and central composite design (CCD). The optimum values for lactose and sodium chloride concentrations and medium temperature were found to be 18.4g/L, 0.161g/L, and 32.4 degrees C, respectively. Experiments carried out at the optimum conditions revealed a maximum specific growth rate of 0.090 1/hr; 42% of total lactose removal was achieved in 24h of fermentation time. The obtained results were finally verified with batch reactor experiments carried out under the optimum conditions evaluated.

    AtıfWoS14OpenAlex16
    Web of SciencePubMedİncele
  • MakaleAçık Erişim2014
    Hospital and health care satisfaction levels of the parents with inpatient children

    Arikan, Duygu; Saban, Fatma; Bas, Nazan Gurarslan

    Objective: This research is done with the aim of determining hospital and health care satisfaction levels of the parents with inpatient children. Methods: Research was carried out descriptively at a university hospital after necessary permissions were taken from institutions. Parents whose children would stay at hospital between April-June 2012 formed the structure of the research and without using any sampling method, 171 volunteer parents were included in research. In collecting data, PedsQL Health Care Satisfaction Scale and descriptive information forms were used. In the statistical evaluation of data percentage distributions, means, standard deviation, t-test, ANOVA, Kruskal Wallis, Mann Whitney U test and alpha coefficient were used. Results: It was determined that there is statistically important difference between communication and technical skill sub-dimensions (p<0,05). It was confirmed that the longer the child hospitalized, general satisfaction of the parents who cannot supply their own necessities (p<0,05), related to moderate technical skill and emotional requirement sub-dimensions decreases (p<0.05). Besides, lower emotional satisfaction subdimension scores for those who had no accommodation (p<0,05), decreased general satisfaction level of the parents who had another child at home (p<0,05). Also family participation and general satisfaction subdimension scores of the parents whose child incurred financial burden was relatively low (p<0,05). Conclusion: Parents were not satisfied with health care services they received. Accordingly, it is offered that the nurses should have a right to make decisions on the procedures related to families' inpatient children and let them be with their children during the procedures and give them information on the procedures that will be applied on the children.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS5OpenAlex7
    Web of Scienceİncele
  • MakaleAçık Erişim2014Scopus SJRQ2
    Gundelia dersim and Gundelia munzuriensis (Compositae), two new species from Turkey

    Vitek, Ernst; Yüce, Ebru; Ergin, Cemil

    Two new species of Gundelia (Compositae) are described from Turkey, G. dersim Vitek, Yuce & Ergin sp. nov. and G. munzuriensis Vitek, Yuce & Ergin sp. nov.

    AtıfWoS12OpenAlex14
    Web of Scienceİncele
  • MakaleYalnız künye2014Scopus SJRQ3
    Length-Weight Relationship and Condition Factor of Hippocampus hippocampus and Hippocampus guttulatus Inhabiting Eastern Black Sea

    Basusta, Asiye; Özer, Ebru I.; Girgin, Hulya; Serdar, Osman; Basusta, Nuri

    In this study,. length weight relationships, of two seahorse species were determined inhabiting Eastern Black Sea. Hippocampus hippocampus (38) and Hippocampus guttulatus (139) individuals were obtained by commercial fishermen in the Eastern Black Sea. Length-weight relationships of H hippocampus were found as W=0.012TL(2 41) (R-2=0,90) and length-weight relationships of H. guttulatus were found as W=0.005TL(2.84) (R-2=0.91). for all individuals. The type of growth for both sexes was negative allometric growth (b<3) for these species. Average condition factors of H. hippocampus and H. guttulatus have shown 0.38 and 0.41, respectively.

    AtıfWoS13
    Web of Scienceİncele
  • MakaleYalnız künye2014Scopus SJRQ1
    Effect of ellagic acid on some haematological, immunological and antioxidant parameters of rainbow trout (Oncorhynchus mykiss)

    Yonar, S. Mise; Yonar, M. E.; Yöntürk, Y.; Pala, A.

    In this study, effect of ellagic acid on some haematological, immunological and antioxidant parameters in the blood and various tissues of rainbow trout (Oncorhynchus mykiss) were examined. Four groups of rainbow trout were fed experimental diets containing either no ellagic acid (control) or supplemented with ellagic acid at 50mg/kg diet (EA-50), 100mg/kg diet (EA-100) or 150mg/kg diet (EA-150) for 21days. Samples of the blood and tissue (liver, kidney and spleen) were collected at the end of the experiment and analysed for their haematological profile (the red blood cell count, the haemoglobin concentration and the haematocrit level), immune response (the white blood cell count, the oxidative radical production (NBT activity), the total plasma protein and total immunoglobulin level) and oxidant/antioxidant status (the malondialdehyde level, the superoxide dismutase, catalase and glutathione peroxidase activity as well as the reduced glutathione concentration). The findings of this study demonstrated that ellagic acid had a positive effect on the haematological parameters, the immune response and the antioxidant enzyme activities of the fish.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS35OpenAlex37
    Web of SciencePubMedİncele
  • MakaleAçık Erişim2014Scopus SJRQ2
    Organoleptic and Chemical Changes during Storage of Sea Bass Marinades (Dicentrarchus labraxL., 1758)

    Kaya, Gulderen Kurt; Bastürk, Ozden

    Chemical and organoleptic changes in sea bass (Dicentrarchus labrax) preserved at 4C for 200 days have been investigated in this study. To prepare the fish fillets for study, they were put, at a ratio of 1:1.5 (fish:marinade brine), for marination into the brine containing 11% salt and 3.5% acetic acid. After the maturation process, samples were divided into two groups and packed in sealed plastic containers as plain and sauced and preserved for 200 days. At both groups packed as plain and sauced, TVB-N, TBA, TMA-N and peroxide number values were at acceptable limits during the storage of 200 days. It can be determined that both of the groups were approved in organoleptic terms; however, the sea bass marinades packed as plain were better approved. Our study shows that sea bass marinades packed as plain and sauced can be stored for 200 days without any quality problems. Practical Applications As the processed products are easy to store and bring a large margin of profit and always ready for the market, developing new products will contribute greatly to the aquaculture processing sector. Marinade processing technology is one of the cheapest technologies in aquaculture products processing and preservation methods, and it is very important in that it enriches the taste of fish, adds flavor and provides a longer shelf life. In the Mediterranean countries, sea bass ranks first in saltwater aquaculture and is among the most important aquaculture products. However; making use of the fish, especially which could not be sold or are undersold in the yield period, with the help of alternative processing methods can contribute to producers, the fisheries processing sector and the national economy. It was determined that sea bass marinades packed as plain and sauced can be stored for 200 days and can still retain their quality.

    • SDG 2 · Açlığa Son
    • SDG 14 · Sudaki Yaşam
    AtıfWoS7OpenAlex10
    Web of Scienceİncele
  • MakaleYalnız künye2014Scopus SJRQ2
    Use of acetylcholinesterase, glutathione S-transferase and cytochrome P450 1A1 in Capoeta umbla as biomarkers for monitoring of pollution in Uzuncayir Dam Lake (Tunceli, Turkey)

    Yildirim, Nuran Cikcikogiu; Yildirim, Numan; Danabas, Durali; Danabas, Seual

    Uzuncayir Dam Lake is one of the most important water bodies in Tunceli. It is polluted by domestic wastewaters together with natural contamination and pesticides, which have had cumulatively negative effects. This study analyzes the effects of pollution by using the fish species, Capoeta umbla as a sentinel species, with a biomarker approach. The approach comprehends a general biomarker of individual fish health, the condition factor and specific biomarkers of contaminant exposure such as glutathione S-transferase (GST) and cytochrome P450 1A1 (CYP1A1) and acetylcholinesterase (AChE) activity. The general water physico-chemical parameters were measured at each sampling sites during each fish-sampling period. Strong seasonal and locational variations were observed among selected markers. In conclusion, the multibiomarker approach used in the present study clearly revealed differences in the fish health among reference and potentially contaminated sites. The study shows that changes of biomarkers such as acetylcholinesterase, glutathione S-transferase and cytochrome P450 1A1 might be useful for the assessment of environmental contamination in the Uzuncayir Dam Lake (Tunceli, Turkey). (C) 2014 Elsevier By. All rights reserved.

    • SDG 6 · Temiz Su ve Sanitasyon
    AtıfWoS14OpenAlex16
    Web of SciencePubMedİncele
  • MakaleYalnız künye2014Scopus SJRQ4
    Gillnet selectivity for Luciobarbus esocinus (Heckel, 1843) in Keban Dam Lake, Elazig, Turkey

    Yuksel, Fahrettin; Gunduz, Fatih; Demirol, Ferhat

    A study was conducted to determine the selectivity of monofilament gillnets with mesh sizes of 50, 60, and 70 mm that are used in Keban Dam Lake for fishing Luciobarbus esocinus (Heckel, 1843). During the study, a total of 394 L. esocinus were caught. Selectivity parameters were estimated using the indirect estimation method developed by Holt (1963). Optimum selection lengths for L. esocinus were calculated to be 36.61, 43.94 and 51.26 cm for gillnets with mesh sizes of 50, 60, and 70 mm, respectively. Common selectivity factor was estimated to be 7.32, with standard deviation 4.58. Length at first maturity of female L. esocinus (50 cm) was compared to the optimum selection lengths of gillnets with mesh sizes of 50, 60, and 70 mm. Results indicate that gillnets with mesh size of 70 mm would be appropriate for harvesting L. esocinus in the Keban Dam Lake, as the optimum selection length (51.26 cm) is greater than length at first maturity.

    AtıfWoS4
    Web of Scienceİncele
  • MakaleYalnız künye2014Scopus SJRQ3
    Electrical and Optical Properties of Titanium Dioxide-Carbon Nanotube Nanocomposites

    Aydin, Handan

    The electrical and optical properties of carbon nanotube and titanium dioxide nano-composites have been investigated. The carbon nanotubes were prepared by chemical vapor deposition. The diameters and lengths of the carbon nanotubes were respectively determined to be 20-30 nm and about 3-5 mu m by high resolution transmittance electron microscopy. The direct current electrical conductivity values sigma(dc) of the nanocomposites were found to be in the range of 5.96 x 10(-3)-0.47 S/cm. It was found that the electrical conductivity of nanocomposites increases with CNT content. The optical band gaps of the nanocomposites were determined by Kubelka-Munk theory based on the analysis of diffuse reflectance spectra. The band gap (E-g) values of the composites were decreased with increasing CNT contents. The obtained results indicate that the electrical and optical properties of TiO2 semiconductor metal oxide can be improved by incorporation of CNT content for electronic applications.

    AtıfWoS6OpenAlex11
    Web of Scienceİncele
  • MakaleAçık Erişim2014Scopus SJRQ3
    Comparision of Low-Cost and Eco-Friendly Adsorbent for Adsorption of Ni(II)

    Ince, Muharrem

    In this study, samples of clay, tea waste, astragalus plant, chestnut shell, and egg shell were used as low-cost and eco-friendly adsorbents for the adsorption of Ni(ID from aqueous solutions. The effect of various parameters such as pH, contact time, adsorbent dose, and final volume on the adsorption capacities of these natural adsorbents were investigated by batch experiments. The adsorption capacity for Ni(II) was found to be 19.4 mg g(-1), 5.4 mg g(-1) 1.3 mg g(-1), 5.6 mg g(-1), 72.0 mg g(-1) for clay, tea waste, astragalus plant, chestnut shell, and egg shell, respectively. Egg shell has maximum adsorption capacity at pH 12, 45-minute contact time, and 0.5 g adsorbent mass. Nickel-free and nickel-loaded adsorbents were characterized by FTIR spectroscopy, which evidenced the functional groups involved in nickel uptake. This work investigated the utilization of eco-friendly and low-cost adsorbents as an alternative natural adsorbent for Ni(II) ions.

    AtıfWoS18OpenAlex14
    Web of Scienceİncele
  • MakaleYalnız künye2014Scopus SJRQ3
    Assessment of immunomodulator biomarkers (Tnf-α, Il-1β and Il-6) in liver of Capoeta umbla for biomonitoring of pollution in Uzuncayir Dam Lake (Tunceli, Turkey)

    Yildirim, N. C.; Danabas, S.

    This study was aimed to monitor water pullution of Uzuncayir Dam Lake using the changes of IL-6, IL1 beta and TNF-alpha levels in Capoeta umbla (Heckel, 1843) liver tissue at ten stations in March and September 2011. In this study C. umbla (Heckel, 1843) was used as the indicator organism. Tumor necrosis factor-alpha (TNF-alpha), interlekuin1 beta (IL-1 beta) and interleukin-6 (IL-6) levels were determined in samples of the liver tissue by ELISA kit. The lowest mean IL-1 beta levels were found at station 6. The mean IL-1 beta was reached its maximum level at station 2. The difference between the mean levels of IL-6 was found to be significant (p<0.05) amoung stations. The IL-6 levels were significantly increased in September at stations 1, 2, 7 and 8 (p<0.01) compared to the values in March. The mean levels of TNF-alpha were found to be significant (p<0.05) amoung stations. The TNF-alpha levels significantly decreased in September at stations 1 and 9 (p<0.01). TNF-alpha, IL-1 beta and IL-6 levels in C. umbla can be used as early diagnostic indicators against adverse environmental events and useful and reliable bioindicators in determining the pollution of the aquatic ecosystem.

    AtıfWoS16
    Web of Scienceİncele
  • MakaleYalnız künye2014Scopus SJRQ3
    Evaluating Teachers' Views on the Impact of Appraisal and Feedback on Professional Development

    Mentese, Sabit

    The purpose of the present research paper is to determine the impact of feedback about appraisal on elementary teachers' professional development. The research was designed as a cross-sectional survey. The population comprised 165 elementary teachers working in primary schools in the central district of Tunceli during 2012-2013 school years. Population was not sampled, but accessed as much as possible. The data was collected using the Teaching and Learning International Survey (TALIS). The Cronbach Alpha reliability coefficient was 0.94. Validity studies were done based on expert opinion. The data was analysed using descriptive statistics, t and ANOVA tests. The results suggested that teachers are supervised and evaluated by the inspectors mostly outside the school; the feedback they receive are mostly about classroom practices. In terms of professional development this. feedback contributed mostly to classroom management practices.

    • SDG 4 · Nitelikli Eğitim
    AtıfOpenAlex1
    Web of Scienceİncele
  • MakaleAçık Erişim2014Scopus SJRQ1
    Effect of Swirl Generator Inserted Into a Tube on Exergy Transfer: Decaying Flow

    Kurtbas, I.; Guelcimen, F.; Kiliçarslan, A.; Kaya, M.

    This study experimentally investigates the effect of conical injector type swirl generator inserts on heat and exergy transfer in a uniform heat flux tube for turbulence regime. One hundred twenty watts of heat are applied by coiling a flexible silicone heater on the tube (copper pipe) with an inside diameter of 62mm and length of 1,200mm. The conical injector type swirl generator has a conical shape, which is similar to a funnel, with angle (alpha) of 30 degrees, 45 degrees, and 60 degrees. Circular holes are drilled on the conical injector type swirl generator as three different cross-sectional areas (A(h)). The total areas (A(t) =N.A(h)) of the holes on the conical injector type swirl generator equal each other. Because of this, the three different holes numbers (N) are produced. Flow directors having three different angles (beta=30 degrees, 60 degrees, and 90 degrees) to radial direction are attached to every one of the holes. This study is a typical example for decaying flow. Reynolds number (Re) was varied from 10,000 to 35,000, so the flow was considered as only a turbulent regime. All experiments were conducted with air accordingly; Prandtl number was approximately fixed at 0.71. The local and average heat transfer Nusselt number (Nu(h)) and exergy transfer Nusselt number (Nu(e)) are calculated and discussed in this article. It is found that the Nu(h) increases with an increase in Reynolds number, director angle (beta), and director diameter (d) but with a decrease in the conical injector type swirl generator angle (alpha). However, Nu(e) decreases depending on the same independent parameters.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    AtıfWoS12OpenAlex13
    Web of Scienceİncele