INFLUENCE OF SHROUD SHAPE ON THE PERFORMANCE IN A BACKWARD INCLINED CENTRIFUGAL FAN
(0) In this study, two shroud designs, parabolic and cone shape one, of a backward inclined (BT) commercial centrifugal fan, on performance was evaluated.The considered fan that is produced by Nicotra Company1 has diameter about 400mm and 11 blades.Whole device with inlet and outlet channel was numerically simulated in steady state, with two shroud shape.Results for parabolic shape were verified by performance curves obtained by experimental tests done by Nicotra.There is a separation region under shroud because of rapid flow direction changes, from axial direction in inlet to radial in entrance of impeller.Performance curves show that parabolic shape has better flow guidance than cone shape one especially in the impeller outlet, which results in reduction in flow losses due to recirculation from this region to inlet clearance.Because of this treatment pressure generation and efficiency are about 3 to 4％ and almost 6.5％ more respectively for parabolic shape.
Backward inclined centrifugal fan numerical solution shroud design
SINA SALARI BIJAN FARHANIEH
M,Sc student,Sharif university of Technology,Tehran,Iran Sharif university of Technology,Tehran,Iran
国际会议
3rd International Conference on Mechanical and Electrical Technology(ICMET2011) (2011第三届机械与电气技术国际会议)
大连
英文
93-99
2011-08-26（万方平台首次上网日期，不代表论文的发表时间）