Assessment of thermochemical nonequilibrium and slip effects for Orbital Reentry Experiment (OREX)
Assessment of thermochemical nonequilibrium and slip effects for Orbital Reentry Experiment (OREX)
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轨道再入实验 (OREX) 的热化学非平衡和滑移效应评估
DOI：
10.2514/2.6280
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发表时间：
1997
影响因子：
2.1
通讯作者：
J. M. Price
中科院分区：
文献类型：
--
作者：
R. Gupta;J. Moss;J. M. Price
本文给出了对日本轨道再入试验（OREX）飞行器前体周围再入流场的粘性激波层（VSL）分析结果。该飞行器是一个半顶角为50度的球头钝锥，头部半径为1.35米，底部直径为3.4米。计算是针对OREX在105至48.4千米高度范围内的飞行轨迹进行的。发现一个7组元化学模型足以用于流场分析。然而，在高于84千米的高度，为了使预测结果与飞行推断的传热率数据良好吻合，需要考虑低密度效应（如热非平衡和滑移）。此外，在低于84千米的高度，应采用有限表面复合概率来代替非催化表面，以便更好地比较计算结果和数据。还将VSL结果与高海拔（高于80千米）的直接模拟蒙特卡罗（DSMC）预测结果以及OREX轨迹中三个高度的电子数密度数据进行了比较。总体而言，飞行数据和计算结果之间有很好的比较。随着数据提取程序的不断改进，OREX数据对于验证用于计算反应气体流场的流场代码中所采用的理论模型应该是有价值的。
Results are provided from a viscous shock layer (VSL) analysis of the reentry flowfield around the forebody of the Japanese Orbital Reentry Experiment (OREX) vehicle. This vehicle is a 50 deg. spherically blunted cone with a nose radius of 1.35 m and a base diameter of 3.4 m. Calculations are done for the OREX trajectory from 105 to 48.4 km altitude range. A 7-species chemical model is found adequate for the flowfield analysis. However, for altitudes greater than 84 km, the low density effects (such as thermal nonequilibrium and slip) are to be implemented for good agreement between the predictions and flight inferred heat-transfer rate data. Further, at altitudes lower than 84 km, a finite surface recombination probability is to be employed in place of a non-catalytic surface for better comparison between the calculations and data. VSL results are also compared with the direct simulation Monte Carlo (DSMC) predictions at high altitudes (greater than 80 km) and the electron number density data for three altitudes in the OREX trajectory. Overall, there is a good comparison between the flight data and calculated results. With the ongoing refinements in data extraction procedures, the OREX data should prove valuable for validating theoretical models employed in flowfield codes for calculation of reacting-gas flowfields.
强冲击波后N2旋转弛豫的实验研究
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
Yamada;G.
通讯作者：
G.