ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Discrete adjoint-based aerodynamic design optimization for hypersonic inward turning inlet
Received date: 2022-12-05
Revised date: 2022-12-22
Accepted date: 2023-03-21
Online published: 2023-04-17
Supported by
National Natural Science Foundation of China(11972308)
Despite its relatively good inlet capture ability and high air compression efficiency, the inward turning inlet cannot be locally adjusted in the preliminary design, and improvement in the adverse effects of complex flow structures such as flow separation and secondary flow caused by shock/boundary layer interference is difficult. Therefore, performance optimization is necessary. The current design optimization of the hypersonic inward turning inlet faces many challenges such as the complex profile, large-scale design variables, and the high accuracy requirement of the flowfield numerical simulation. The gradient optimization method based on discrete adjoint is adopted to carry out the aerodynamic design optimization for the inward turning inlet with a wedge forebody. The optimization results show that the undulating shape of the inner and outer compression sections significantly changes the internal shock structure, reduces the wall pressure gradient, and thereby abates the streamwise vortex. In addition, the interference intensity between the shock train and the boundary layer in the isolation section is significantly weakened, inhibiting the expansion of the low energy flow region. Under the design condition, compared with the initial configuration, the aerodynamic performance of the optimized configuration is significantly improved. The total pressure recovery coefficient, the flow coefficient and the pressure ratio at the exit are increased by 8.767%, 0.163%, and 0.763%, respectively, while the drag is reduced by 1.658%.
Xiaofeng WANG , Feng QU , Junjie FU , Zeyu WANG , Chaoyu LIU , Junqiang BAI . Discrete adjoint-based aerodynamic design optimization for hypersonic inward turning inlet[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(19) : 128352 -128352 . DOI: 10.7527/S1000-6893.2022.28352
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