ACOUSTIC SUPPRESSION OF AUTOOSCILLATIONS IN A WIND TUNNEL WITH AN OPEN TEST SECTION.

被引：0
|
作者：
Zhukovskiy Inst of Aerohydrodynamics, USSR [1 ]
Breytveyt, V.K. [1 ]
Zosimov, A.V. [1 ]
Timofeyev, Ye.B. [1 ]
机构：
[1] Belopol'skaya, L. L., Belopol'skaya, L. L.
来源：
Fluid mechanics. Soviet research | 1986年 / 15卷 / 04期
关键词：
ACOUSTIC VARIABLES MEASUREMENT - Acoustic Field - NOZZLES;
D O I：
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中图分类号：
学科分类号：
摘要：
The velocity and pressure fluctuations in the open test section of a wind tunnel with a 1. 2 m diameter nozzle, designed for maximum suppression of low-frequency flow fluctuations were investigated. However, at several average flow velocities we observed self oscillations of the flow, which cause a two- to three-fold increase in the intensity of longitudinal velocity fluctuations. These fluctuations in the flow in the test section were suppressed by application of a low-frequency acoustic field, which reduced the intensity of velocity and pressure fluctuations of self oscillatory flow modes to a level equal to that of non-self oscillatory modes.
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页码：1 / 8
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