移动带和切向吹气对气动力的影响

Effect of Moving Belts and Tangential Blowing on Aerodynamic Force

使用数值计算和风洞试验的方法获得某三厢轿车的气动力,并采用现有的修正方法对气动力结果进行修正.对比了气动力的计算值和试验值,结果表明所采用的数值计算方法所获得的气动力值与试验值一致性较好.通过对移动带形式和切向吹气角度的研究发现:移动带形式对气动力影响不大,气动力系数差值约在0.002左右;切向吹气角度也同样不对气动力造成较大影响.

Both numerical simulation method and wind tunnel test were used to measure the aerodynamic force of a sedan. Then, experiment results were corrected by the existing correction method. Comparison results show that the aerodynamic force obtained by the numerical calculation method has good consistency with the test results. Moreover, the study on moving belt form and tangential blowing angle indicates that different moving belts have little effect on the measured value of the aerodynamic force, and the difference of drag coefficient is less than 0. 002; the tangential blowing angle also has little effect on the aerodynamic force.