通气空泡水洞试验壁面影响理论分析及空化数修正  

Wall effects and cavitation number correcting of supercavitating tests in water tunnel

作　　者：陈伟政[1] 韦喜忠[1] 李鹏[1] CHEN Weizheng;WEI Xizhong;LI Peng(China Ship and Science Research Center,Wuxi Jiangsu 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《实验流体力学》2021年第2期112-116,共5页Journal of Experiments in Fluid Mechanics

基　　金：国防基础科研计划(A0820132028)。

摘　　要：以超空泡横截面独立膨胀原理作为理论基础,针对水洞通气超空泡试验中不可避免的壁面影响问题,推导了水洞试验段压力环境下空泡形态的理论计算公式,与已有的无界流空泡形态计算公式比较,得到了试验段沿程压降对空泡形态的影响规律。基于推导的公式,进一步分析了模型阻塞比对空泡形态的影响,给出了试验中实测空化数与原型空化数的理论换算方法。This paper is intended to evaluate the wall effects in the super-cavity flow past a test model held in a closed water tunnel,and to establish a theoretical correction rule.Based on the principle of independence of cavity expansion,mainly considering the longitudinal pressure gradient in the working section,a theoretical solution of the super-cavity shape in the closed water tunnel is derived.With the theoretical solution the wall effects are discussed,and a correction rule of the cavitation number is presented.

关 键 词：超空泡 水洞试验 壁面影响 修正方法 

分 类 号：O352[理学—流体力学]