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采用阻尼网对大开角段内的气流分离进行控制,并合理设置其参数,是工程上有效的方法之一。为验证阻尼网工程设计方法的可靠性,以0.6m连续式跨声速风洞为背景,通过数值模拟,对工程设计方法的初步结果进行了验证,并在此基础上结合大开角段布置环境对阻尼网参数进行了优化。由计算结果知,采用方案3-4(两层阻尼网损失系数分别为1.6和1.0)时,大开角段出口截面的速度均方根偏差值(RMS)为14.5%;考虑布置环境影响,调整两层阻尼网损失系数至0.8和1.0时,RMS值为16.2%。研究结果表明,阻尼网工程设计方法结合数值模拟可以有效地应用于大开角段整流装置的设计,达到了抑制大开角段内气流分离,降低压力损失,提高出口速度均匀性的设计目标。
Using damping network to control the airflow separation in the large open-angle section and setting its parameters reasonably is one of the most effective engineering methods. In order to verify the reliability of the engineering design method of dam network, the preliminary results of the engineering design method were verified by numerical simulation with 0.6m continuous transonic wind tunnel as the background. Based on this, the layout of the environment The damping network parameters are optimized. From the results of the calculation, the root mean square deviation (RMS) of the velocity at the exit section of the wide-open section is 14.5% when using Scheme 3-4 (the damping coefficients of the two layers of damping net are 1.6 and 1.0, respectively). Considering the impact of the layout environment, Adjusting the damping coefficient of the two-layer damping net to 0.8 and 1.0, the RMS value is 16.2%. The results show that the design of damping network engineering combined with numerical simulation can be effectively applied to the design of wide open angle rectification device, which achieves the design goal of restraining air flow separation in large opening angle, reducing pressure loss and improving outlet velocity uniformity.