混合管面积和位置对排气引射器性能的影响

通过对一个轴对称波瓣主喷管与４种不同截面积的圆形混合管、并分别在不同轴向位置时的组合试验，研究了混合管与主喷管截面积之比Ａｍ／Ａｐ及轴向间距Ｌｍｐ对排气引射系统的引射系数、压力损失系数和气动性能综合参数等的影响。结果表明：在试验范围内，Ａｍ／Ａｐ增大，系统的引射系数增大、综合氯动性能改善；Ｌｍｇ增大，４系统的引射系数和压力损失系数也增大。对于不同范围，压力损失系数增加的斜率不同，；总的趋势则是综合

Effect of mixing tube area and position on performances for lobed ejector

Experimental research for four mixing tubes with different sectional area and different axial distance for a axisymmetric lobed nozzle was conducted to investigate the effect of area ratio A m/ A p and axial distance L mp between lobed nozzle and mixing tube on the aerodynamic performances for a lobed exhaust system. The results show that the pumping coefficient increase and synthetic aerodynamic performance of the system can be improved with the increase of A m/ A p.The pumping coefficient and pressure loss coefficient of the system also increase with L mp increase.The slope of pressure loss coefficient with L mp change is different in different range, and the synthetic aerodynamic performance be worse with L mp increase.