水下垂直发射航行体多孔排气气泡融合特性研究

Study on air bleed fusion characteristics of vertically launched underwater vehicle

水下航行体采用多孔排气可有效改善航行体受力特性,多孔排气排出气泡融合特性是航行体受力改善的基础。文章基于空泡独立膨胀原理建立了多孔排气气泡形态理论计算模型,通过试验验证了模型的合理性,并给出了匀速运动时多孔排气气泡融合准则,为排气气泡融合判定奠定了基础。针对初始压比、航行体运动速度、排气孔参数等因素对排气气泡形态影响开展计算,结果表明航行体运动速度在一定范围内越高、相同排气总面积下排气孔数量越多,越有利于排气融合,初始压比对排气融合影响较小。

The characteristics of loads on the underwater vehicle would be effectively improved by air bleed, which would also affect the attitude of the vehicle. Theory model for multi-holes air bleed was established based on the independence principle of the cavity section expansion, and the reliability of the calculated model was proved by the experiment data. The influence of the initial pressure ratio and the veclocity of the vehicle, also including the air bleed parameters were studied for the exhaust bubbles. The results show that bubbles fusion would more easily occur when the veclocity of the vehicle is increased in a certain range, as well as the number of the holes is increased. The initial pressure ratio has little effect on the bubbles fusion.