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首页> 外文期刊>Journal of Spacecraft and Rockets >Transonic Aerodynamics of a Lifting Orion Crew Capsule from Ballistic Range Data
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Transonic Aerodynamics of a Lifting Orion Crew Capsule from Ballistic Range Data

机译：基于弹道距离数据的猎户座提升胶囊的跨音速空气动力学

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Estimated nonlinear aerodynamic coefficients, including pitch- and yaw-damping derivatives, were obtained for a lifting model of the Orion crew capsule from experiments in the Hypervelocity Free-Flight Aerodynamics facility at NASA Ames Research Center. Nominal Mach numbers for the tests ranged from 0.70 to 1.25. A 44.45 mm-diameter powder gun launched the models through the 22.86 m-long test section, where their positions and attitudes were recorded with shadowgraph cameras at 16 optical stations. Data for nonlifting capsules were also taken. For angles of attack far from trim, both the lifting and nonlifting configurations appear to be stable in pitch damping. The symmetric models at supersonic speeds and the lifting models near Mach 0.7 show significant instability in pitch damping close to trim. For the latter case at small sideslip angles, yaw damping is also unstable.
机译：通过在美国国家航空航天局艾姆斯研究中心的超高速自由飞行空气动力学设施中进行的实验，获得了猎户座乘员舱提升模型的估计非线性空气动力学系数，包括俯仰和偏航阻尼导数。测试的标称马赫数为0.70至1.25。直径为44.45毫米的粉末火炮通过22.86 m长的测试段发射了这些模型，并在16个光学站的阴影摄影机上记录了它们的位置和姿态。还记录了非提起胶囊的数据。对于远离修整的迎角，提升和非提升构型在俯仰阻尼方面似乎都是稳定的。在超音速下的对称模型和在0.7马赫附近的升力模型显示出接近微调的俯仰阻尼明显不稳定。对于后一种情况，在较小的侧滑角处，偏航阻尼也不稳定。

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