温盐分层环境中航行体运动尾迹与浮力射流耦合效应实验研究

Experimental Study on the Coupling Wake Effect Due to the Motion and Buoyant Jet of the Vehicle in Thermohaline Double Stratified Environment

基于分层流试验水池,采用移动多通道热电阻传感器阵对水下温度场进行测量,采用红外热像仪同步获取水面温度场,开展了温盐双分层环境下航行体运动尾迹与浮力射流耦合效应的实验研究。实验结果证明,航行体尾流的水面效应主要依赖于运动尾迹强度,而浮力射流的扩散浮升受到温盐分层的抑制,只在初始阶段及排放口附近位置影响背景水体温度分布;航速增大,强化了运动尾迹对背景分层的扰动,而弱化了浮力射流的影响;航行体尾流水面热特征依赖于航行体深度,对于浮力射流初始速度不敏感。

Based on the stratified flow test pool,a mobile multi-channel thermal resistance sensor array was used to measure the underwater temperature field,and an infrared thermal imager was used to obtain the surface temperature field synchronously.An experimental study was carried out on the coupling effect of vehicle wake and buoyant jet in a thermohaline double stratified environment.The experimental results show that the surface effect of the vehicle wake mainly depends on the strength of the moving wake,while the diffuse buoyancy jet is inhibited by thermohaline stratification,which only affects the background water temperature distribution at the initial stage and near the discharge.With the increase of the speed,the disturbance of the moving wake to the background stratification is strengthened,while the infuence of the buoyant jet is weakened.The thermal characteristics of the wake surface of the vehicle depend on the depth of the vehicle and are not sensitive to the initial velocity of the buoyancy jet.