Abstract One key feature that distinguishes the flowfield around vehicles flying in supersonic and hypersonic regimes is the bow shock wave ahead of forebody. The severe drag and aeroheating impacting these vehicles can be significantly reduced if the bow shock wave ahead of the vehicles forebodies is controlled to yield weaker system of oblique shocks. Benefits of forebody shock control include increasing flight ranges, economizing fuel consumption, reducing dead weights, and thermally protecting forebody structure and onboard equipment. Forebody shock control that has been widely studied since the early 1900s is achievable in numerous techniques that vary according to the mechanism of control. While some of these techniques have already been implemented in real systems, other techniques involve serious complications and tough trade-offs. The present paper is intended to serve as the first comprehensive survey on the field of forebody shock control devices. The objectives of the present paper are multifold. The paper categorizes the various forebody shock control devices in a physics-based manner, explains the underlying physics for each device, and surveys the key studies and state-of-the-art knowledge. The paper also addresses the existing gaps in knowledge, highlights the existing systems implementing these devices, and discusses the associated practical implementation issues and design-tradeoffs.

中文翻译：

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用于减阻和气动加热的前体减震装置：具有实用视角的综合调查

摘要 区分超音速和高超音速飞行器周围流场的一个关键特征是船首前方的弓形激波。如果控制车辆前身前方的船首激波以产生较弱的斜激波系统，则可以显着减少对这些车辆的严重阻力和空气加热。前身减震控制的好处包括增加飞行距离、节省燃料消耗、减少自重以及热保护前身结构和机载设备。自 1900 年代初期以来，前体减震控制已被广泛研究，可通过多种技术实现，这些技术因控制机制而异。虽然其中一些技术已经在实际系统中实现，但其他技术涉及严重的复杂性和艰难的权衡。本文旨在作为对前体减震装置领域的第一次全面调查。本文件的目标是多方面的。本文以物理学为基础对各种前体减震装置进行了分类，解释了每个装置的基础物理学，并调查了关键研究和最先进的知识。本文还解决了现有的知识差距，重点介绍了实施这些设备的现有系统，并讨论了相关的实际实施问题和设计权衡。解释每个设备的基础物理，并调查关键研究和最先进的知识。本文还解决了现有的知识差距，重点介绍了实施这些设备的现有系统，并讨论了相关的实际实施问题和设计权衡。解释每个设备的基础物理，并调查关键研究和最先进的知识。本文还解决了现有的知识差距，重点介绍了实施这些设备的现有系统，并讨论了相关的实际实施问题和设计权衡。