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RISS 인기검색어
- 검색키워드
- 저자 : Burçin Deda Altan (검색결과 3 건)
- 무료
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Burçin Deda Altan 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.11
In this study, obtaining energy especially from large and medium sized pipelines used for drinking water, rain water, or even someused for waste water has been aimed. In line with this objective, it has been investigated how to increase the performance of the waterrotors used in the pipelines in order to benefit optimally from the energy of the flowing fluid in pipe. Furthermore, in order to increase theperformance of the water rotor used in pipelines, a water baffle plate has been placed in front of the water rotor. In this way, the effects ofsize parameters of the water rotor used in the pipeline in conjunction with the various design parameters of the water baffle plate on thepower performance of rotor has been investigated. By comparing design parameters, the number of the water rotor blades has also beeninvestigated. Optimization steps have been carried out with numerical results of the study supported by theoretical computation. For numericaloptimization of the water rotor, both static and dynamic performances of rotor have been found. According to the optimizationstudy, the maximum power performance values have been obtained from a power pipe unit which consists of a water rotor and a waterbaffle plate with (xg/rr = 0.1, yg/rr = 0.4, ve rr/rp = 0.4 ve α = 60°) size ratios.
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A study on increasing the performance of Savonius wind rotors
Burçin Deda Altan,Mehmet Atılgan 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.5
"Savonius wind rotors with a vertical axis are not much preferred and used due to their lower aerodynamic performance than that of the other high-speed wind rotors. The present study is intended to increase the rotor performance of the Savonius wind rotor with theoretical method by focusing on a curtain arrangement as a wind deflector with a simple construction, which has been designed to increase the performance of the Savonius wind rotor. This curtain arrangement has been placed in front of the rotor so as to prevent the negative torque that occurs on the convex surface of the Savonius wind rotor and causes the performance of the rotor to be low. Thus, it has become possible to make a more efficient use of the wind energy increasing the low performance level of the Savonius wind rotors."
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Gürkan Altan,Muzaffer Topçu,Numan Behlül Bektaş,Burçin Deda Altan 대한기계학회 2008 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.22 No.12
An elastic-plastic thermal stress analysis was carried out on an orthotropic aluminum metal matrix composite disc with a hole by using an analytical solution. The thermal load distribution was chosen to vary parabolically from inner surface to outer surface. An aluminum composite disc reinforced curvilinearly by steel fibers was produced under hydraulic press. The mechanical properties of the composite disc were obtained from experiments by using strain gauges. A computer program was developed to calculate the thermal stresses under a parabolic temperature from inner surface to outer surface. The material was assumed to be non-linear hardening. The elastic-plastic solution was performed for the plastic region expanded around the inner surface by an analytical method. The magnitude of the tangential stress component for elastic and elastic-plastic was higher than the magnitude of the radial stress component. Besides, the tangential stress component was compressive on the inner surface and tensile on the outer surface. The magnitude of the tangential residual stress component was the highest on the inner surface of the composite disc. The plastic region began at the inner surface of disc.
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