NNW-HyFLOW, supported by the National Numerical Windtunnel (NNW) Project, is developed as a domestic independent industrial CFD software for hypersonic flow simulation based on structural/unstructured hybrid grids. It is designed with the basic framework provided by the PHengLEI open source program, and can be used mainly for simulation of thermochemical nonequilibrium effects of high temperature gas, and calculation and analysis of related aerodynamic forces, aerodynamic heat and aerophysical characteristics. The design ideas and framework characteristics of the software are first introduced, including the framework design, data structure, coupling method, parallel computing method, and interface design. Then, the theoretical models, core numerical methods and their implementation employed by the solver are illustrated. Finally, numerical simulations using the software are conducted for several examples including the HEG wind tunnel experiment, RAM-C flight experiment, Electre flight experiment and flight experiment of space shuttle OV102 model. Results shows that the software has the advantages of less code reuse, good functional compatibility, strong expansion capabilities, and flexible interface. Additionally, its current test version already has a good simulation capability for hypersonic nonequilibrium flow, and can achieve high accuracy in prediction and evaluation of thermochemical nonequilibrium effects and their impact on aerodynamic forces, aerothermal environment and plasma distribution characteristics. It is proved that the software can meet the basic requirements of numerical simulation of high-temperature nonequilibrium flow for the complex hypersonic aircraft.
LI Peng
,
CHEN Jianqiang
,
DING Mingsong
,
HE Xianyao
,
ZHAO Zhong
,
DONG Weizhong
. Framework design of NNW-HyFLOW hypersonic flow simulation software[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021
, 42(9)
: 625718
-625718
.
DOI: 10.7527/S1000-6893.2021.25718
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