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中文摘要：
应用基于滤波器的湍流模型（FBM）对绕圆盘空化器空化非定常流动和阻力特性进行了数值计算和分析.计算中雷诺数保持不变,通过改变来流压强获得不同的空化数;FBM模型通过二次开发嵌入至商业软件CFX中.结果表明,随着空化数的减小,绕圆盘空化器的空化区域由与空化器分离转变为附着于空化器;大空化数时,尾迹中更明显的旋涡分布将增强空化器所受阻力的周期性和波动性;随着空化数减小,圆盘空化器所受阻力变得稳定.
英文摘要：
Unsteady cavitating flow around a disc cavitator and its drag characteristics were studied numerically using the filter-based model（FBM）.The simulation was carried out in a constant Reynolds number but different cavitation numbers,which were attained through the pressure variation of the inlet flow.The FBM model was embedded into the commercial software CFX through secondary development.The numerical results showed that the cavitation region will turn attached with the cavitator with the decrease of the cavitation number.The wake vortex can increase the periodicity and fluctuation of the drag force acting on the cavitator in the condition of large cavitation number,and with the decrease of the cavitation number,a stable drag characteristic curve will be acquired.
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