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首页> 外文期刊>Journal of Spacecraft and Rockets >Experimental Expansion lube Study of the Flow over a Toroidal Ballute
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Experimental Expansion lube Study of the Flow over a Toroidal Ballute

机译：环形涡流流动的实验膨胀润滑油研究

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An experimental investigation of high-enthalpy flow over a toroidal ballute (balloon/parachute) was conducted in an expansion tube facility. The ballute, proposed for use in a number of future aerocapture missions, involves the deployment of a large toroidal-shaped inflatable parachute behind a space vehicle to generate drag on passing through a planetary atmosphere, thus, placing the spacecraft in orbit. A configuration consisting of a spherical spacecraft, followed by a toroid, was tested in a superorbital facility. Measurements at moderate-enthalpy conditions (15-20 MJ/kg) in nitrogen and carbon dioxide showed peak heat transfer rates of around 20 MW/m~2 on the toroid. At higher enthalpies ( > 50 MJ/kg) in nitrogen, carbon dioxide, and a hydrogen-neon mixture, heat transfer rates above 100 MW/m~2 were observed. Imaging using near-resonant holographic interferometry showed that the flows were steady except when the opening of the toroid was blocked.
机译：在膨胀管装置中进行了环形圆盘（气球/降落伞）上高焓流的实验研究。拟议用于未来许多航空航天飞行任务的滑翔伞涉及在航天器后面部署大型环形充气降落伞，以在穿过行星大气时产生阻力，从而使飞船进入轨道。在超轨道设施中测试了由球形航天器和环形物组成的配置。在中等焓条件下（15-20 MJ / kg）在氮气和二氧化碳中进行的测量表明，在环形表面上的峰值传热速率约为20 MW / m〜2。在氮气，二氧化碳和氢-氖混合物中具有较高的焓（> 50 MJ / kg）时，观察到传热速率高于100 MW / m〜2。使用近共振全息干涉术成像显示，除了环形开口被阻塞外，流量稳定。

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