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李梦雪,周正贵. 载荷分布对可控扩散叶型性能的影响[J]. 科学技术与工程, 2020, 20(30): 12618-12629.
LI Meng-xue.Numerical Investigation of the Influence of Load Distribution on Controlled Diffusion Airfoils Aerodynamic Performance[J].Science Technology and Engineering,2020,20(30):12618-12629.
载荷分布对可控扩散叶型性能的影响
Numerical Investigation of the Influence of Load Distribution on Controlled Diffusion Airfoils Aerodynamic Performance
投稿时间:2020-01-14  修订日期:2020-08-05
DOI:
中文关键词:  可控扩散叶型  优化设计  载荷分布  气动设计  数值模拟
英文关键词:controlled diffusion airfoil  optimization design  load distribution  aerodynamic design  numerical simulation
基金项目:国家科技重大专项
     
作者单位
李梦雪 南京航空航天大学能源与动力学院
周正贵 南京航空航天大学能源与动力学院
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中文摘要:
      叶型吸力面和压力面等熵马赫数分布符合控制扩散规律,则其设计点损失小、低损失攻角范围大。为了研究可控扩散叶型载荷分布对叶栅气动性能的影响,建立了可控扩散叶型自动优化设计方法;并对叶栅进口马赫数为0.7的静子和转子叶型进行多个载荷分布设计,分析载荷分布规律对叶栅性能的影响。结果表明对于静子及转子叶型,载荷前移(至0.1倍相对轴向弦长位置)可抑制吸力面附面层发展,降低设计进气角损失、增大低损失攻角范围;吸力面峰值马赫数增大,吸力面靠前缘凸起程度越大,小攻角损失增加、最低损失对应进气角增大。
英文摘要:
      The distribution of isentropic Mach number of the airfoil’s suction side and pressure side accords with the control diffusion criteria, made the design point losses low and the operating range wide. In order to study the influence of the load distribution on the aerodynamic performance of cascades, an automatic optimization design method for controlled diffusion airfoils is established, several load distribution designs are carried out for stator and rotor airfoils with the inlet Mach number of 0.7, then the influence of the load distribution law on the performance of the cascades is analyzed. The results show that for stator and rotor airfoils, front-loading (forward to 0.1 times of the relative axial chord length) is helpful to inhibit boundary layer development, reduce the design point loss and increase the operating range; the peak Mach number of suction side increases, the camber near the leading edge of airfoil suction side increases, loss under small incidence increases and the inlet flow angle corresponds to the minimum loss increases.
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