筒口泄气影响下齐射出水运动干扰特性试验研究

Experimental study on motion interference characteristics of salvo water under influence of tube outlet

为研究筒口泄气影响下双发航行体齐射出水过程流动干扰特性,基于高速摄像技术对航行体齐射出水过程流场演变开展试验测试研究.利用图像处理技术对航行体空泡形态和运动轨迹进行识别并提取,对比分析了单发航行体与双发航行体的空泡形态和运动轨迹演变特性的差异,并研究了艇速作用下航行体的流动干扰特性.结果表明:在无艇速作用下,双发航行体内外两侧空泡轮廓呈现出明显的不对称状;在艇速作用下,迎流侧泡型扩张幅度一般较小,但由于受到筒口泄气产生的不均匀气团的较大影响,导致首发航行体迎流侧泡型较大;无论是单发航行体发射还是双发航行体齐射过程,其初始运动姿态均极易受发射筒口不均匀气团的影响,其次还有筒口密封膜表面张力及发射气压等因素影响.

To study the flow interference characteristics of the salvoed double-vehicle during the water-exit process under the influence of the tube outlet,experimental tests on the evolution of the flow field of the water-exit process of the vehicle were conducted based on high-speed camera technology.The cavity morphology and motion trajectory were identified and extracted by using image processing technology and the differences between the cavity morphology and motion trajectory evolution characteristics of the single-vehicle and double-vehicle were compared and analyzed,and the flow interference characteristics under the action of submarine speed were studied.Results show that the cavity contour on both sides of the vehicle is obviously asymmetric under the action of no submarine speed.The expansion of the cavity pattern on the oncoming side is generally small under the action of submarine speed,but the cavity pattern on the oncoming side of the first-vehicle is larger due to the great influence of the uneven air mass generated by the tube outlet.Whether it is a single-vehicle launching or a salvoed double-vehicle process,the initial motion attitude is easily influenced by the uneven air mass at the launch tube,followed by the surface tension of the barrel seal film and the launch air pressure.