Arash Mirabdolah Lavasani and Taher Maarefdoost
Designing a Low Speed Wind Tunnel for Investigating Effects of Blockage Ratio on Heat Transfer of a NonCircular Tube
1383 - 1386
2014
8
8
International Journal of Mechanical and Mechatronics Engineering
https://publications.waset.org/pdf/9998986
https://publications.waset.org/vol/92
World Academy of Science, Engineering and Technology
Effect of blockage ratio on heat transfer from noncircular tube is studied experimentally. For doing this experiment a suction type low speed wind tunnel with test section dimension of 14&times;14&times;40 and velocity in rage of 720 ms was designed. The blockage ratios varied between 1.5 to 7 and Reynolds number based on equivalent diameter varies in range of 7.5&times;103 to 17.5&times;103. The results show that by increasing blockage ratio from 1.5 to 7, drag coefficient of the cam shaped tube decreased about 55 percent. By increasing Reynolds number, Nusselt number of the cam shaped tube increases about 40 to 48 percent in all ranges of blockage ratios.
Open Science Index 92, 2014