水下航行体垂直发射过程气幕形态特性研究

Shape characteristics of gas screen of underwater vehicle vertical launch

摘要:

采用VOF多相流混合模型和标准k-ε湍流模型对水下航行体气幕垂直发射过程中气幕形态特性进行了深入研究．研究了气幕的形态、长度和夹断点距离随马赫数的变化规律,与实验结果进行了对比分析,分析结果说明了本数值方法的正确性和可靠性．得到了气幕垂直发射过程中的气幕的长度和夹断点距离在Ma<1.1时随马赫增大逐渐增加, 而Ma≥1.1时,介于21～22之间的气幕夹断点距离随马赫数的增加而基本不再变化．获得的气幕形态轮廓随马赫数的增大而增大．

Abstract:

The shape characteristics of gas screen in water are thoroughly studied by adopting the multiphase VOF model and the standard k-ε turbulence model. The shape, length and location of pinch-off of the gas screen have been calculated by numerical method, and the results are well consistent with the experimental results, which prove the accuracy and reliability of the numerical method. The length and pinch-off position of the gas screen gradually increase as the Mach number is increased in the process of the vertical launching technology of the gas screen when Ma<1.1. However, when Ma<1.1, the length of pinch-off position from 21 to 22 does not vary, and the shape contour of the gas screen increases as the Mach number is increased.