Blunt-Body Entry Vehicle Aerotherodynamics: Transition and Turbulent Heating
Blunt-Body Entry Vehicle Aerotherodynamics: Transition and Turbulent Heating
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DOI：
10.2514/1.51864
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发表时间：
2012-08
影响因子：
1.6
通讯作者：
B. Hollis
中科院分区：
文献类型：
--
作者：
B. Hollis
最近，目前，和计划中的美国宇航局的任务，采用钝头体进入车辆造成的气动热力学问题，挑战国家的最先进的实验和计算方法。边界层转捩和热屏上的湍流加热问题在火星科学实验室和载人探测飞行器的设计中都变得很重要。虽然在这些一般领域有相当多的经验，但这些经验主要来自简单的几何形状;例如，尖锥和平板，或从升力体，如航天飞机轨道飞行器。对于钝头体飞行器，现有的数据、关联式和比较的应用是值得怀疑的，因为与其它构型的超音速（甚至高超音速）流相比，在弓形激波后面产生的是全部或大部分亚音速流场。由于需要设计和验证数据的项目，如火星科学实验室和乘员探索飞行器，许多新的实验研究已经进行了在过去的十年中，以获得详细的边界层转捩和湍流加热数据，这类车辆。在本文中，几个测试程序的细节进行审查。从这些不同的测试的层流和湍流数据示出相关的边缘为基础的斯坦顿和雷诺数函数。从转捩开始和湍流加热增强作为动量厚度雷诺数的函数的数据开发的相关性。这些相关性可以作为工程级的设计和分析工具。
Recent, current, and planned NASA missions that employ blunt-body entry vehicles pose aerothermodyamic problems that challenge state-of-the-art experimental and computational methods. The issues of boundary-layer transition and turbulent heating on the heat shield have become important in the designs of both the Mars Science Laboratory and Crew Exploration Vehicle. While considerable experience in these general areas exists, that experience is mainly derived from simple geometries; e.g., sharp-cones and flat-plates, or from lifting bodies such as the Space Shuttle Orbiter. For blunt-body vehicles, application of existing data, correlations, and comparisons is questionable because an all, or mostly, subsonic flowfield is produced behind the bow shock, as compared with the supersonic (or even hypersonic) flow of other configurations. Because of the need for design and validation data for projects such asMars Science Laboratory andCrewExplorationVehicle, many new experimental studies have been conducted in the last decade to obtain detailed boundary-layer transition and turbulent heating data on this class of vehicle. In this paper, details of several of the test programs are reviewed. The laminar and turbulent data from these various test are shown to correlate in terms of edge-based Stanton andReynolds number functions. Correlations are developed from the data for transition onset and turbulent heating augmentation as functions of momentum thickness Reynolds number. These correlations can be employed as engineering-level design and analysis tools.