基于DOE的多级轴流压气机气动优化设计
Optimized Aerodynamic Design of Multi-stage Axial Compressor based on DOE
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摘要: 在保持绝热效率前提下进一步提升级负荷或级增压比是航空轴流压气机发展的永恒追求。探讨了将DOE实验设计优化理论引入航空轴流压气机的初始设计与后期优化的具体做法:首先,使用拉丁超立方设计,在效率最大化、总压比为目标匹配值的准则下,确定各约束条件的变化域并生成试验方案;其次,依据发动机总体设计要求,选取适当的初始设计参数,借助一维流线反问题计算程序进行计算,运用一维正问题程序进行验算;再次,在一维计算合格基础上做二维轴对称计算,对在设计点和非设计点压气机的工作特性进行分析表明,基于拉丁超立方设计的压气机具有较高的级增压比和较宽广的稳定工作范围;最后,对压气机进口总压和第一级静子预旋角度等应用响应面进行优化设计,优化后的压气机总体性能较此前有较大提高。Abstract: The premise of maintaining the adiabatic efficiency to further enhance the level load or level pressure ratio,which is the eternal punsuit of axinu flow com pressor derelop ment.We have introduce the DOE into the axial flow compressor initial design and post-optimization.Firstly,using the Latin hypercube design to maximize the efficiency and total pressure with the goal of matching criteria to determine the changes in the domain of the constraints to generate the test program.Secondly,accordance to the overall engine design requirements,select the appropriate initial design parameters to do the 1D inverse flow calculation,checking with the 1D flow calculation.Thirdly,on the qualified 1D calculation do 2D axsymmetric calculation and analysis of the operating characteristics of the compressor in design point and non-design point.After the analysis,it shows that based on the Latin Hypercube design,the compressor can obtain a high-level overall pressure ratio and a broader stability work scope.Finally,we do response surface optimization design of the compressor inlet total pressure and the first stage stator pre-rotation angle,the result shows that the optimized compressor overall performance has improved greatly than before.