切向流与偏流相互干扰对穿孔板声阻抗的影响
Effect of Grazing-Bias Flow Interaction on Acoustic Impedance of Perforated Plates
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摘要: 对切向流和偏流相互干扰如何影响穿孔板声阻抗进行了细致的实验研究,结果表明:切向流削弱了偏流对穿孔板声阻的调控,但在较高偏流速度下,偏流对穿孔板声阻的影响仍起主导作用;此外,不同的偏流方式(吹气或吸气)与切向流干扰对穿孔板声阻抗的影响有明显区别。最后,尝试通过有效流量系数把不同实验条件下的数据关联起来。Abstract: The effect of grazing bias flow interaction on the orifice acoustic impedance has been experimentally investigated.It is shown that the acoustic resistance of an orifice increases slowly with the increase of bias flow speed because of grazing flow effect,but the acoustic resistance is dominated by the bias flow effect when bias flow speed is comparatively high.In addition,there is some difference between grazing inflow and grazing outflow interactions.Finally, an attempt is made to correlate the experimental data in terms of the effective discharge coefficient.
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Key words:
- perforated /
- plates /
- acoustic /
- impedance
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