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.
出处
《工程力学》
EI
CSCD
北大核心
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)
关键词
空化模型
相变
蒸发系数
冷凝系数
空化
cavitation model
phase change
evaporation coefficients
condensation coefficients
cavitation
