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对350 km/h高速检测车明线运行外空气流场进行数值模拟,车头表面压力计算结果与理论值进行比较,误差1%,在允许范围之内,验证了计算模型的高可信度.分析高速检测车辅助变流器进风口和排风口压力分布规律,结果表明:辅助变流器不工作的情况下进风口的平均压力为正,且相差不大,排风口1的压力为正,排风口2,3的压力为负,进排风口的压差都为正.辅助变流器正常工作时进排风口的压力变化规律与不工作时相同,但进风口平均压力都为负值,且平均压力减小.1号辅助变流器进排风口压差为负值,2,3号辅助变流器进排风口压差均为正值.1号辅助变流器排风口的压力偏高,进排风口压差为负,计算表明此位置不适合设置排风口.
The numerical simulation of the air flow field outside the open line of the 350 km / h high-speed test car was carried out. The calculation result of the surface pressure of the front car was compared with the theoretical value, and the error was 1% within the allowable range, which verified the high reliability of the calculation model. The results show that the average pressure of the air inlet is positive and the difference is not big, the pressure of the air outlet 1 is positive , The pressure of exhaust vents 2 and 3 is negative and the pressure difference of inlet and exhaust vents are positive.When the auxiliary converter works normally, the pressure change of inlet and exhaust vents is the same as when not working, but the average inlet pressure Is negative, and the average pressure is reduced.A1 auxiliary converter inlet and outlet differential pressure is negative, No. 2,3 auxiliary converter inlet and outlet differential pressure are positive value .1 No. auxiliary converter Exhaust outlet pressure is too high, into the exhaust pressure is negative, the calculation shows that this position is not suitable for setting the exhaust port.