为了研究转速及高、中压喷嘴间偏转距离对气波引射装置性能的影响，分析两个参数与低压端口真空度间的变化规律。设定高压进气压力为1.5 MPa，低压、中压和高压端口宽度分别为63，37和44 mm，高压与低压端口间固壁段宽度为14 mm。实验研究了当转速分别为2 500，3 000，3 500以及4 000 r/min，偏转距离分别为10，18和26 mm时，中压出口压力与低压端口真空度之间的关系。结果表明：在恒定转速条件下，低压端口处真空度与中压出口压力呈负相关关系；当中压出口压力恒定时，随着设备转速的增加，真空度先增大后减小。在中压压力一定的情况下，当转速较低时真空度随偏转距离增大而减小，当转速较高时真空度随着偏转距离的增大呈现先减小后增大的趋势，偏转距离对真空度具有显著影响，且存在最优值，最优值与设备转速相关。此外，真空度与设备引射率近似呈正比例关系，即引射率和增压比呈负相关关系。

In order to study the influence of rotating speed and deflection distance between high and medium pressure nozzles on the performance of gas wave ejector,the variation law of them on the vacuum degree of low pressure port is analyzed.The pressure at the high pressure port is 1.5 MPa,and the width of low,medium and high pressure ports is 63,37 and 44 mm respectively,the width of the fixed wall section between the high and low pressure ports is 14mm.The relationship between the pressure at the middle pressure outlet and the vacuum degree at the low pressure port is studied when the rotating speed is 2 500,3 000,3 500 and 4 000 r/min,and the deflection distance is 10,18 and 26 mm,respectively.The results show that the vacuum at the lowpressure port increases with the decrease of the pressure in medium port under the condition of constant speed.When the pressure in medium is constant,the vacuum increases first and then decreases with the increase of the equipment speed.When the rotation speed is low,the vacuum degree decreases with the increase of deflection distance.When the rotation speed is high,the vacuum degree decreases first and then increases with the increase of deflection distance,the deflection distance has a significant influence on the vacuum degree.And there is an optimal value,which is related to the rotating speed of the equipment.In addition,the ejection rate of the equipment is approximately positively proportional to the vacuum degree,that is,ejection rate and pressurization ratio are negatively correlated.

TQ051.3

国家重点研发计划（2018YFA0704602）；国家自然科学基金 （22008022）