通气超空泡水洞试验阻塞效应影响研究  

Research on the influence of blockage in water tunnel for ventilated supercavitating flow

作　　者：周景军[1] 李荣融[1] 项庆睿[1] 吕瑞[1] 

机构地区：[1]中国船舶重工集团公司第七〇五研究所,西安710075

出　　处：《水动力学研究与进展（A辑）》2014年第3期361-366,共6页Chinese Journal of Hydrodynamics

基　　金：中国博士后科学基金(2012M521811)~~

摘　　要：水洞阻塞效应对于通气超空泡流动有重要影响,会导致水洞试验获得的相关参数与在无限流场中存在较大差别。为此,该文采用基于欧拉两流体多相流模型的数值模拟方法,对水洞试验阻塞效应机理进行了研究。首先,数值方法的有效性通过水洞试验数据进行了验证;其次,分别研究了水洞壁面黏性效应和尺度效应对于通气超空泡形态的影响规律,分析了水洞阻塞效应的产生机理。研究结果表明:水洞阻塞效应将会导致空泡长细比变大,仅通过增加空化器直径来增加空泡最大直径效果不明显;水洞阻塞效应主要受到壁面黏性效应和尺度效应的影响,且随来流速度增加而愈加明显;水洞试验设计应该对试验水速和模型尺度进行权衡考虑。以上研究成果对于通气超空泡水洞试验设计具有一定的指导意义。The blockage effect of water tunnel has the important influence on the ventilated supercavitating flow, thus cause the difference of parameters from the experiments in water tunnel and infinite flow field. In this paper, the mechanism of blockage effect in water tunnel is investigated based on the Euler two-fluid multiphase flow model. The validity of the numerical method is firstly verified by the experimental data in water tunnel. Secondly, the influencing law to supercavity shape from the viscous effect of water tunnel wall and scale effect is studied, the mechanism of blockage effect in water tunnel is analysed. The results show that： the cavitation slenderness ratio becomes bigger due to the blockage effect of water tnnnel; the influence to the maximal diameter of cavity is not obvious by adding the diameter of the cavitator; the blockage effect of water tunnel is mainly affected by the viscous and scale effect of the wall and becomes more obvious with the higher velocity; the velocity and the model scale should be overall considered for the design of the experiments in water tunnel The above results in water tunnel are of significance to the design of the ventilated supercavitating experiments in water tunnel.

关 键 词：通气超空泡 数值模拟 阻塞效应 

分 类 号：TV131[水利工程—水力学及河流动力学]