通气法控制超空泡流动的实验研究  

Experimental Investigation to Supercavitation Flow with Ventilated Method

作　　者：杨武刚[1] 张宇文[1] 阚雷[1] 范辉[1] 

机构地区：[1]西北工业大学,西安710072

出　　处：《应用力学学报》2007年第4期504-508,共5页Chinese Journal of Applied Mechanics

基　　金：国防基础研究项目(K51414010405)资助

摘　　要：在高速水洞中运用人工通气方法进行了航行体模型超空泡形态特性的系列实验研究。获得了不同通气流量、不同空化数和不同弗鲁德数下的空泡形态,建立了以弗鲁德数为参数的空泡几何特征参数与空化数的对应关系、空化数与通气流量系数之间的对应关系。验证了空化数是决定空泡尺度的主要无因次参数,通过改变通气流量可以有效地调控空化数,进而达到控制空泡形态的目的。文中同时给出了通气流量系数的实验曲线拟合公式,并与国外的相关实验和公式进行了比较,两者基本一致。所得结论对进一步的水下超高速航行体空泡形态控制技术研究具有参考价值。A series of underwater vehicle model experiments for the supercavity shape property are carried out at high speed water tunnel with ventilation method. The cavity configuration is obtained in cases of different gas volumetric coefficient, cavitation number and Froude number. The mutual dependency relation between cavitation number and the geometrical cavity dimension together with the gas volumetric coefficient are presented by regarding Froude number as the parameter. The cavitation number plays an important role in the domination of the artificial supercavitation, and gas entrainment method enables to effectively regulate and control supercavitation magnitude. In addition, the approximate fitting formula of the gas volumetric coefficient is put forward and its rationality is indicated by the comparison with the corresponding experiments and semi-empirical relationship for the further research on the supercavity control technology of super-high speed underwater vehicle.

关 键 词：水洞实验 空泡形态 通气超空化 水下航行体 流量系数 空化数 

分 类 号：O352[理学—流体力学]