Wall Pressure Distribution Induced by Saw-Tooth Flap
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摘要: 在风洞用电子扫描阀进行测压,研究了绕平板扰流片和锯齿扰流片分离流动的壁面压力分布.结果表明平板扰流片和锯齿扰流片均在上游x/h=-6处剪切层开始分离,并再附于下游x/h≈20的位置.锯齿扰流片横向位置的变化对壁面平均压力分布几乎没有影响,但通过锯齿槽流向的压力脉动一般大于通过锯齿尖点流向的脉动.从平均压力分布看,锯齿高度可以增加扰流片阻流效果,采用锯齿扰流片可以减小下游壁面压力的脉动.Abstract: Wall pressure distribution induced by the saw-tooth flap has been investigated with electronic pressure scanner in wind tunnel. The results showed that the shear layer of the saw-tooth flap separated at x/h=(6 upstream and reattached at x/h≈20 downstream, which is the same with the plate flap; The transverse location of the flap has little influence on the mean pressure distribution, and the distribution of pressure fluctuation along the saw-tooth groove is greater than that along the saw-tooth tip; The saw-tooth can block the flow and much more effectively reduce the pressure fluctuation downstream.
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Key words:
- flow separation /
- saw-teeth /
- pressure distribution /
- flow reattachment /
- flap
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