超声速湍流多孔抽吸性能的参数影响
Parameter Influence on Porous Bleed Performance for Supersonic Turbulent Flows
AI总结：
通过三维RANS模拟系统研究了板长、孔径、孔隙率、厚度-直径比和交错角对超声速湍流多孔抽吸性能的影响，发现孔径是关键参数，孔隙率和交错角次之，厚度-直径比和板长主要影响抽吸效率。
摘要：
多孔抽吸系统是控制激波-边界层相互作用和/或超声速边界层的常用技术。然而，各种设计参数的影响仍不清楚。尽管抽吸模型被要求用于最小化设计过程的成本，但它们通常不包含参数效应。在本研究中，通过三维RANS模拟研究了板长、孔径、孔隙率、厚度-直径比和交错角的影响。确定了抽吸效率以及在减薄马赫数M = 1.6湍流边界层方面的有效性。研究结果表明，孔径对多孔抽吸的效率和有效性具有关键影响。孔隙率和交错角也有类似发现，但显著性较小。厚度-直径比和板长主要影响抽吸效率。
英文摘要：
Porous bleed systems are a common technique to control shock-boundary layer interactions and/or supersonic boundary layers. However, the influence of various design parameters is still unknown. Even though bleed models are required to minimize the costs of the design process, they often do not include parameter effects. In the present study, the effect of the plate length, the hole diameter, the porosity, the thickness-to-diameter ratio, and the stagger angle are investigated by means of three-dimensional RANS simulations. The bleed efficiency and the effectiveness in thinning a Mach M = 1.6 turbulent boundary layer are determined. The findings show a crucial influence of the hole diameter on both efficiency and effectiveness of the porous bleed. Similar findings are made for the porosity and stagger angle but with a smaller significance. Thickness-to-diameter ratio and plate length are shown to mainly affect the bleed efficiency.
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