大曲率音速文丘利喷嘴的理论分析与实验研究

Theoretical Analysis and Experimental Investigation of the Critical Venturi Nozzles with Large Curvatures

本文根据空气动力学原理分析了大曲率音速文丘利喷嘴的特性,指出其流出系数具有较高的稳定性,因而可望提高喷嘴的实际使用精确度。文中采用改进了的二元流动理论计算方法,使之既适用于小曲率喷嘴,又适用于大曲率喷嘴。理论计算结果与实验数据很好地一致。

On the basis of aerodynamics,this paper analyses the characteristics of the critical Venturi nozzle with a large curvature,which could have a more stable discharge coefficient and a higher accuracy in practical applications.An improved,calculation method for the two-dimensional transonic flow,which is applicable to the nozzles with either large or small curvatures,has been adopted.The calculated results are in good agreement with the experimental data.