The invention discloses a Fluent-UDF-based pneumatic characteristic calculation method for an inflatable reentry capsule, and the method comprises the steps: solving to obtain the density of each group of fractions in a specified temperature and pressure range; the fraction densities of all the components in the specified temperature range and the pressure range are substituted into an air physical property calculation formula to obtain the viscosity coefficient and the heat conductivity of air in the specified temperature range and the pressure range; according to the viscosity coefficient and the heat conductivity of the air in the specified temperature range and the pressure range, a UDF code is compiled, the UDF code takes temperature and pressure as variables, two-dimensional interpolation is conducted on the viscosity coefficient and the heat conductivity of the air in the specified temperature range and the pressure range, and the viscosity coefficient and the heat conductivity of the air at the specific temperature and pressure are obtained; loading the UDF code into Fluent software, importing the UDF code into a computational grid of a flow field computational domain of the inflatable reentry capsule, and setting boundary conditions of the computational grid to obtain aerodynamic characteristics of the inflatable reentry capsule. According to the method, the calculation amount is greatly reduced.
本发明公开了一种基于Fluent‑UDF的充气式返回舱气动特性计算方法,包括:求解得到指定温度和压力范围内的各组分数密度,将指定温度范围和压力范围内的各组分数密度带入空气物性计算公式得到指定温度范围和压力范围内的空气的粘性系数和热导率;根据指定温度范围和压力范围内的空气的粘性系数和热导率,编制UDF代码,该UDF代码是以温度和压力为变量,对该指定温度范围和压力范围内的空气的粘性系数和热导率进行二维插值,获得特定温度和压力的空气的粘性系数和热导率;将UDF代码加载到Fluent软件中,并导入充气式返回舱流场计算域的计算网格,设置计算网格的边界条件,得到充气式返回舱气动特性。本发明极大的减少了计算量。
Inflatable reentry capsule aerodynamic characteristic calculation method based on Fluent-UDF
一种基于Fluent-UDF的充气式返回舱气动特性计算方法
2023-05-30
Patent
Elektronische Ressource
Chinesisch
British Library Conference Proceedings | 2004
|Numerical Analysis of Aerodynamic Heating on MUSES-C Reentry Capsule
British Library Conference Proceedings | 1996
|