超燃冲压发动机二维进气道优化设计方法研究

Design and optimization method for two dimensional scramjet inlet

关键词:  超燃冲压发动机  高超声速进气道  混合压缩式进气道  最优化设计  数值计算

Key words:  Supersonic combustion ramjet engine  Hypersonic inlet  Mixed compression inlet  Optimum design  Numerical calcualtion

摘要:

建立了超燃冲压发动机二维进气道的优化设计模型 ,运用优化设计方法对三楔角外压和二楔角内压的混压式进气道进行了不同约束条件下的一维优化设计。运用数值方法对进气道的优化设计进行了二维验算 ,验证了优化设计模型及设计方法的正确性。在此基础上将数值计算方法应用于进气道的二维优化设计 ,进一步提高了进气道的性能。该方法可进一步推广应用于包含三维、真实气体流动的进气道优化设计当中。

Abstract:

An optimization model was established for three wedge external compression and two wedge internal compression scramjet inlet. Optimum designs subject to different constraints were obtained using the method of successive quadratic programming. The computational fluid dynamics method was employed in two dimensional inlet optimum design using the one dimensional solution as an initial condition. The solution of two dimensional optimum design shows more performance improvements over the one dimensional design. This method can be improved to take the 3 D and real gas effects into account with only a modification of the CFD model.