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Role of flow kinematic and energetic effects in hypersonic flow control

机译:流动运动和能量效应在高超音速流动控制中的作用

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Different methods have been proposed by researchers for reducing the high wave drag associated with blunt bodies that are usually used in most hypersonic missions. This paper discusses some of the popular methods like increasing the blunt shock wave stand-off distance ahead of the body which can be achieved by using either a retractable aero-spike or a forward facing jet so that the hypersonic flow control is dominated by flow kinematics. Also, techniques such as concentrated energy deposition ahead of the body, heat releasing smart coating, forward facing plasma jet emanating from the stagnation zone of the blunt body have been discussed where flow energetic effects are dominant. Substantial aerodynamic drag reductions (25% to 54%) around blunt bodies have been measured in the experiments. We also review some important factors affecting the flow pathology of hypersonic flow fields when we employ different hypersonic flow control strategies.
机译:研究人员已提出了不同的方法来减少通常在大多数高超音速飞行任务中使用的钝体带来的高波阻力。本文讨论了一些流行的方法,例如增加钝性冲击波在人体前方的距离,这可以通过使用可伸缩的气动尖刺或面向前的射流来实现,从而使高超音速流量控制由流动运动学控制。 。此外,还讨论了诸如能量在人体前部沉积,散热智能涂层,从钝体停滞区发出的正向等离子体射流等技术,这些技术中流动能的作用占主导地位。在实验中已测量出钝体周围的空气动力学阻力明显降低(25%至54%)。当我们采用不同的高超音速流控制策略时,我们还将回顾一些影响高音速流场流动病理的重要因素。

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