Parameter Optimization of Jet Control for Compression Ramps of Two-Dimensional Inlet Based on Isight
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摘要:
二元进气道常用于宽速域吸气式飞行器,宽速域飞行器的飞行速域较大,进气道要兼顾高低速条件下的飞行要求,这存在一定的困难。利用射流进行前体激波控制,在一定程度上可以改善流场,并提升进气道性能,但现有的射流激励方案仅是将激波推至唇口,不一定使得进气道达到最优性能或造成射流流量过多损失,因此射流控制参数的优化是一个重要问题。基于Isight软件搭建优化流程,采用Hooke-Jeeves优化方法,以射流角度、射流宽度以及射流位置作为优化变量,流量系数作为约束条件,总压恢复系数最大作为目标函数进行优化,探究了来流Mach数为6时不同射流参数对进气道性能的影响。结果表明,Hooke-Jeeves优化方法可以应用于进气道前体射流控制参数优化问题,优化后的进气道能够满足流量系数的要求,射流角度优化后的总压恢复系数相对于无射流方案提升18%,综合优化后的总压恢复系数相对于仅优化射流角度提升2.82%。
Abstract:Two-dimensional inlet is usually used in the wide-speed-range aircraft which has a higher flying velocity region. It is difficult to meet more requirements under both low-speed and high-speed flow conditions. Although the inlet performance could be improved by using jets to control shock waves on compression ramps, the existing jet excitation only push the shock wave toward the cowl, which may not achieve optimal performance. The optimization of jet control parameters is a significant problem. The effects of different optimization variables on inlet performance were investigated at Ma=6 based on Isight with the Hooke-Jeeves method, in which different jet parameters were selected as optimization variables, flow coefficient was selected as constraint condition and maximum total pressure recovery coefficient was selected as objective function for optimization. The result show that the Hooke-Jeeves method is able to optimize inlet with jet control. The optimized inlet can meet the requirements of flow coefficients. The total pressure recovery coefficient after optimizing the jet angle is increased by 18% compared to the inlet without jet, and the total pressure recovery coefficient after combination optimization is increased by 2.82% compared to only optimizing the jet angle.
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Key words:
- inlet /
- Isight /
- flow control /
- parameter optimization /
- total pressure recovery coefficient
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