Study on the Sensitivity of the Streamwise Location of MVG on SWBLI in MVG-Based Supersonic Flow Control
Study on the Sensitivity of the Streamwise Location of MVG on SWBLI in MVG-Based Supersonic Flow Control
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DOI：
10.3390/fluids7090285
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发表时间：
2022-08
期刊：
影响因子：
1.9
通讯作者：
Yonghua Yan;Demetric Baines;Yong Yang;Caixia Chen;T. Kwembe
中科院分区：
文献类型：
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作者：
Yonghua Yan;Demetric Baines;Yong Yang;Caixia Chen;T. Kwembe
微涡发生器（MVG）是目前一种简便、可靠、可行的超声速和高超声速流动控制装置。本研究的目的是探讨MVG的流向位置对SWBLI的影响。通过对MVG控制的超声速坡道流动进行大涡模拟，揭示了MVG流向位置对激波边界层相互作用控制的敏感性。给出了MVG与坡道转角距离差异较小的数值情况。结果分别从时间平均和瞬时角度进行了分析。结果表明，在某些方面，流向位置对SWBLI有显著影响。MVG产生的环状涡高度和强度变化不大，但在流向位置变化不大。然而，环形涡的微小变化会对坡道前的分离区域产生相对显著的变化。在时间平均解上，MVG离坡道越远，环形涡的抬升越高，激波的扰动/减弱也越强烈。此外，壁面的流动分离区也变小了。研究结果对MVG在流动控制中的进一步优化配置具有指导作用。
Micro vortex generator (MVG) is a currently facile, robust, and feasible device for supersonic and hypersonic flow control. The purpose of this study is to investigate the impact on SWBLI from the streamwise location of MVG. Large eddy simulation (LES) was conducted on MVG controlled supersonic ramp flow to reveal the sensitivity of MVG streamwise position on shock-wave boundary-layer interaction (SWBLI) control. Numerical cases with minor different distances between MVG and ramp corner are carried out. The results are analyzed in time-averaged and instantaneous view, respectively. The results show that streamwise position has a significant effect on SWBLI in some aspects. With minor changes on the streamwise position, the ring-like vortices generated by MVG were very similar, with only small changes in height and intensity. However, the small changes made on the ring-like vortices produced relatively significant changes to the separation region in front of the ramp. In terms of the time-averaged solution, the farther the MVG is from the ramp, the higher the ring-like vortices are lifted, and the shock wave is also disturbed/reduced more strongly. Further, the flow separation zone on the wall also appears smaller. The results of this study play a guiding role for further optimal configuration of MVG in flow control.