UNSTEADY-FLOW IN DIFFUSERS

被引：19
|
作者：
KWONG, AHM
DOWLING, AP
机构：
[1] Cambridge University, Engineering Department, Cambridge, CB2 1PZ, Trumpington Street
来源：
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME | 1994年 / 116卷 / 04期
关键词：
D O I：
10.1115/1.2911859
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The flow in a diffuser is unsteady in the range of optimum pressure recovery; diffusers can therefore be a major source of noise in pipework systems. A theory is developed to predict the frequency of this noise and good agreement with experimental results, for both conical and rectangular diffusers, is demonstrated. The acoustics of the duct to which a diffuser is connected are found to have a crucial effect on the unsteady flow within the diffuser, a point which has been overlooked previously in the literature. Once this is recognized, it is possible to reconcile experimental results for air and water diffusers.
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页码：842 / 847
页数：6
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