空化模型中的相变系数影响研究  

STUDY OF THE INFLUENCE OF PHASE-CHANGE COEFFICIENTS IN THE CAVITATION MODEL

作　　者：王柏秋[1] 王聪[1] 黄海龙[2,3] 何春涛[1] 张嘉钟[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]北京宇航系统工程研究所,北京100076 [3]哈尔滨工业大学土木学院,哈尔滨150090

出　　处：《工程力学》2012年第8期378-384,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51149003);中央高校基本科研业务费专项资金项目(HIT.NSRIF.2013033)

摘　　要：利用数值计算的方法,对空化模型中的相变系数进行研究。将数值计算和实验数据进行分析和整理,分别获得蒸发系数和冷凝系数与空化数之间的依赖关系。通过比较半球头圆柱体的二维轴对称模型数值计算结果表明:不同空化数对应着不同相变系数。其中,蒸发系数和冷凝系数分别对主空泡、次生空泡、尾空泡等类型的空泡在形态、溃灭位置、溃灭强度等方面有较大影响。The influence of phase-change coefficients in a cavitation model was studied using a numerical method. By comparing the numerical results and experimental data, the relationships of evaporation coefficients ＆ cavitation number and condensation coefficients ＆ cavitation number are obtained. The results of a 2D axisymmetric hemispherical cylinder under different cavitation numbers show that： different cavitation numbers are corresponding to different phase-change coefficients, and variations of the coefficients of evaporation and condensation have a great influence respectively on the main cavity, secondary cavity, rear cavity, and other types of cavity in cavity shape, collapse position, collapse strength, and so on.

关 键 词：空化模型 相变 蒸发系数 冷凝系数 空化 

分 类 号：O351.2[理学—流体力学] O414.3[理学—力学]