轴向气流下曲壁板气动压力的理论与实验研究
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摘要
针对轴向气流作用下曲壁板上的静态气动力进行了理论及实验研究,采用势流的点源解和泰勒级数展开方法获得了曲壁板上的气动力公式.设计了两组带有不同初始曲率的铝合金曲壁板风洞模型.将曲壁板的初始构型函数带入气动力公式得到实验壁板模型的理论气动压力,并与已有的理论计算结果及实验结果进行了对比分析.结果表明:初始曲率越大,作用在曲壁板上的气动压力越大;曲壁板的两端会出现正压区,正压区的范围与初始曲率有关.本气动压力计算方法与实验结果吻合良好,表明了该计算方法的合理性及准确性.
In this paper,the static aerodynamic force on a curved plate in axial flow was studied by the theoretical and experimental analysis,and the aerodynamic distribution on the curved panel was revealed. Using the Taylor series expansion and the point source solution of potential flow,the aerodynamic pressure formula on the curved plate was obtained. Two sets of aluminum alloy curved plates with different initial curvature were designed,and the static pressure under different wind speed on the plate was tested in the wind tunnel. The initial configuration function of the curved panel was applied in the aerodynamic formula,and the theoretical aerodynamic pressure of the experimental panel model was obtained. Then a contrastive analysis was done based on the existing theoretical and experimental calculation results. The results showed that the larger the initial curvature was,the greater the aerodynamic pressure on the curved plate would be; positive pressure zone appeared at both ends of the curved plate,and the area of positive pressure was related to the initial curvature; the aerodynamic forces given in this paper was in good agreement with the experimental results and showed the rationality and accuracy of this calculation method.
In this paper,the static aerodynamic force on a curved plate in axial flow was studied by the theoretical and experimental analysis,and the aerodynamic distribution on the curved panel was revealed. Using the Taylor series expansion and the point source solution of potential flow,the aerodynamic pressure formula on the curved plate was obtained. Two sets of aluminum alloy curved plates with different initial curvature were designed,and the static pressure under different wind speed on the plate was tested in the wind tunnel. The initial configuration function of the curved panel was applied in the aerodynamic formula,and the theoretical aerodynamic pressure of the experimental panel model was obtained. Then a contrastive analysis was done based on the existing theoretical and experimental calculation results. The results showed that the larger the initial curvature was,the greater the aerodynamic pressure on the curved plate would be; positive pressure zone appeared at both ends of the curved plate,and the area of positive pressure was related to the initial curvature; the aerodynamic forces given in this paper was in good agreement with the experimental results and showed the rationality and accuracy of this calculation method.
引文
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[4]Raghunathan R S,Kim H D,Setoguchi T. Aerodynamics of High-speed Trains[J]. Progr Aerosp Sci,2002,38(6/7):469-514.
[5]杨智春,周建,谷迎松.超音速气流中受热曲壁板的非线性颤振特性[J].力学学报,2012,44(1):30-38.
[6]Gordnier R E,Fithen R. Coupling of a nonlinear finite element structural me with a Navier-Stokes solver[J]. Comput Struct,2003,81(2):75-89.
[7]李鹏,杨翊仁,鲁丽.微分求积法分析二维亚音速壁板的失稳问题[J].动力学与控制学报,2012,10(1):11-14.
[8]刘少文,李鹏,杨翊仁.亚音速气流中曲壁板的分岔研究[J].四川理工学院学报(自然科学版),2016,29(5):57-62.