Investigation and Applications of Multi-species Numerical Method Based on NNW-FlowStar

The multi-species numerical method has a strong demand in the simulation of propulsion systems, jet/flow control, and wind tunnel verification, due to it could simulate the change of species distribution caused by species transport, the flow field of thermally perfect gas. Based on NNW-FlowStar software, the multi-species numerical simulation ability was investigated and realized by the theoretical investigation and method verification in this paper, which will be applied in the thermally perfect gas CFD simulations of airplane, rocket, and hypersonic aircraft. Then, three examples were implemented to verify the multi-species numerical method investigated, and a conclusion was derived from the results. Firstly, the aerodynamic force coefficients achieved by the multi-species method realized in this paper are consistent with the ideal gas and experiment while the ideal gas is replaced by multi-species. Secondly, the accuracy and reliability of the multi-species numerical method realized in this paper were verified by comparing the results of three-dimensional hydrogen transverse injection and nitrogen opposing injection cases to the experimental one. Finally, the transverse jet of a typical general missile model (cone-cylinder-flare) was analyzed by the multi-species method, and the conclusion drawn from the results addresses that the multi-species numerical method investigated in this paper has the ability of a detailed analysis of the multi-species flowfield and application in industrial multi-species CFD simulation.