4 sonuçlar
Arama Sonuçları
Listeleniyor 1 - 4 / 4
Öğe Effects of cutting parameters and point angle on thrust force and delamination in drilling of CFRP(De Gruyter, 2014-11-14) Çelik, Yahya Hışman; Kılıçkap, Erol; Yardımeden, AhmetParts made of composite materials are generally produced by near-net-shape technology. However, additional machining operations such as drilling are often required to facilitate components assembling. Drilling of composite materials is also a common process in the assembly of aerospace and automotive composite structures. During drilling, unlike the conventional materials, a few damage forms may take place. Among these damage forms, the delamination is the most important one. Therefore, the experimental studies carried out on drilling of CFRP composite materials for determining optimum processing parameters are of great importance. In this particular study, delamination in CFRP composites caused by drilling was investigated. The composite material was drilled under various spindle speeds, feed rates and drill point angles. The results showed that delamination and thrust forces were affected by cutting parameters. It was demonstrated that feed rate and drill point angle make the largest contribution to the overall performance.Öğe Experimental investigation of solar stills integrated with solar water heating collectors(Türk Isı Bilimi ve Tekniği Derneği, 2017-10-31) Argunhan, Zeki; El, Emin; Yıldız, Cengiz; Çakmak, GülşahSolar still is a more practical way of obtaining clean water. In this study, we aimed to improve the efficiency of solar still systems and obtain distilled water at the same time. For this purpose, 5 different solar still systems were designed. Type 1; conventional solar still, Type 2; conventional solar still integrated with solar water heating collector and run via natural convection, Type 3; conventional solar still integrated with solar water heating collector and tubular heat exchanger and run via natural convection, Type 4; conventional solar still placed with plate heat exchanger and integrated with solar water heating collector and run via natural convection, Type 5; conventional solar still placed with plate heat exchanger and integrated with solar water heating collector and run via forced convection. In this study, the experiments were carried out on the parameters influencing the performance, the amount of distilled water obtained, and the efficiency of experiment settings designed in different types; and finally the results were presented. The amount of distilled water and efficiency of conventional solar still were 2389 ml and 51.47%, respectively. Maximum total amount of water and efficiency from natural convection systems were obtained from Type 4, and the values calculated were found as to be 5788 ml and 55.91%. Maximum amount of distilled water and the efficiency were obtained by utilizing forced convection system were found as to be 6068 ml and 58.99%, respectively.Öğe Tabakalı hibrit kompozit malzemelerin yorulma davranışlarının analizi(Tüm Bilim İnsanları ve Akademisyenler Derneği, 2019-09-30) Topkaya, Tolga; Solmaz, Murat Yavuz; İmak, AnılEndüstride geniş kullanım alanına sahip tabakalı kompozit malzemeler, kullanıldıkları alanlara bağlı olarak tekrarlı yüklere maruz kalabilmektedirler. Bu nedenle malzemelerin tekrarlı yüklere karşı dayanımı önemli bir parametredir. İzotropik malzemelerden farklı olarak kompozit malzemelerin yorulma davranışlarının tespiti daha zordur. Bunun sebebi kompozit malzemelerin tasarımı sırasında ele alınan parametrelerin sayısının fazlalığıdır. Gerçekleştirilen bu çalışmada tabakalı hibrit kompozit malzemelerin yorulma davranışları deneysel olarak incelenmiştir. Çalışmada karbon ve cam olmak üzere üç farklı hibrit numune elle yatırma yöntemi ile epoksi reçine kullanılarak üretilmiştir. Elyafların reçine ile birleştirilmesinin ardından kompozit levhalara hidrolik sıcak pres uygulanmıştır. Yorulma deneylerinin yapılabilmesi için gerekli olan numuneler ASTM standartlarına uygun şekilde boyutlandırılmıştır. Deneyler sırasında gerilme oranı 0.1 ve frekans 10 Hz seçilmiştir. Deney sonucunda elde edilen sonuçlar karşılaştırmalı olarak grafikler halinde sunulmuştur.Öğe Effect of the air flow rate of blower on the performance of solar still(Türk Isı Bilimi ve Tekniği Derneği, 2015-06-01) Argunhan, Zeki; El, Emin; Yücel, Halit Lutfi; Çakmak, Gülşah; Yıldız, CengizSolar distillation is one of the important methods for water purification. This paper examines the performance of solar distillation system at different air flow rate. To increase the performance of distiller, artificial wind was created by fan and suitable wind speed was investigated to increase the amount of water distilled. The experiments were carried out in Elazığ climate conditions. In order to examine the effect of the wind speed on solar distillation system, two stills were manufactured with the size of 1000x1000 mm. One of them was the conventional still which was used as a reference. The other still was used to investigate experimentally the effect of the wind speed. Graphs were drawn for time-dependent changes in the amount of water distilled. It was found that that the productivity of the fan-still distiller was 14.7 % greater than that of a conventional still.
