Document Details

Document Type : Article In Journal 
Document Title :
Effect of Winglet Shape on Heat Transfer from Heated Cylinder in Cross Flow
تأثير شكل مولد الدوامات على انتقال الحرارة من أسطوانة مسخنة
 
Subject : Mechanical Engineering 
Document Language : English 
Abstract : Experimental investigation of the flow and heat transfer around a heated cylinder in cross flow with and without using winglets has been carried out. Distribution of the static pressure coefficients and Nusselt number and knowledge of the flow processes around the cylinder without winglets enable as to form an idea of the mechanism and pattern of the flow around the cylinder with winglets. The flow was in fully-developed turbulent flow with Reynolds number range 0.72*104?Re?1.44*104. Four different shapes of winglets were used with different angles of attack (20, 26, 32) at different locations ((Xm/D=0, 0.17, 0.3, 0.5), (Ym/D=0.57, 0.65, 0.72, 0.8)). The results show that there is an effect of winglet shapes on heat transfer and pressure drop, and a better shape is a (trapezoidal (type 3)). For enhanced heat transfer from cylinder, heat transfer increases with increasing Reynolds number and angle of attack. Also the results show that the optimum position of winglet for enhanced heat transfer is (Xm/D=0.17 and Ym/D=0.65). The research shows that heat transfer is enhanced as high as (14%) when winglets are used when compared with the case of a cylinder without winglets. There is also a slight increase in pressure drop. 
ISSN : 1319-1047 
Journal Name : Engineering Sciences Journal 
Volume : 17 
Issue Number : 2 
Publishing Year : 1427 AH
2006 AD 
Number Of Pages : 11 
Article Type : Article 
Added Date : Sunday, October 11, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
جلال محمد جليلJalal M. JalilResearcher  
حسن كريم عبدالله Hassan K. AbdullaResearcher  
أحمد هاشم يوسفAhmed H. YusufResearcher  

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