Scramjet Isolator Shock-Train Leading-Edge Position Modeling Based on Equilibrium Manifold

Scramjet Isolator Shock-Train Leading-Edge Position Modeling Based on Equilibrium Manifold
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基于平衡流形的超燃冲压发动机隔离器激波系统前沿位置建模

DOI:
10.1061/(asce)as.1943-5525.0000389
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发表时间:
2015-03
影响因子:
2.4
通讯作者:
Wen Bao
Wen Bao
中科院分区:
工程技术4区
文献类型:
--
作者:
Jichao Hu;Juntao Chang;Bin Qin;Lei Wang;Wen Bao

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AbstractA dynamic model showing the relationship between backpressure and shock-train leading edge (STLE) is necessary in the development of a STLE automatic control algorithm. In this research, a nonlinear dynamic model based on equilibrium manifold expansion is presented to locate the STLE position in a large range of operation conditions. The initially started flow field of a hypersonic inlet at different throttling ratios was experimentally studied at freestream Mach numbers 4.5–6.0. The nominal STLE position was defined by the pressure ratio method. The variation of STLE position with backpressure and freestream Mach number was then discussed. Testing with the experimental data, past models could only be used locally, whereas for large range of operation conditions they lose effectiveness. Therefore, the nonlinear dynamic modeling method based on equilibrium manifold is introduced to solve this problem, the simulation results, and comparisons at large range of operation conditions show its validity.
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