水面舰船气泡尾流的电导率特性和热特性的实验研究

在实验室水槽中用微孔陶瓷管模拟了水面舰船的气泡尾流，采用自制的包含电导率探头和温度传感器的复合探头，测量了模拟气泡尾流的电导率信号，并在海上实测了不同水面舰船气泡尾流的电导率信号和热特征信号，分析了这两种信号的形成机理及其主要影响因素。实验测量结果表明：水面舰船气泡尾流区的电导率信号和热特征信号与非尾流区的信号具有显著差别，尾流区与非尾流区的信号差值与海洋垂直温度梯度的大小、目标船的吨位和吃水深度及航速的大小成正比。

Experimental study on the conductivity characteristic and thermal characteristic of the bubble wake of surface ship

A micro-hole ceramic pipe was used to simulate the bubble wake of a surface ship in a water tank in the laboratory. The conductivity signal of the simulated bubble wake was measured by means of a compound probe made by ourselves with the sensors of conductivity and temperature. Then conductivity signal and thermal characteristic signal of the bubble wakes behind different full size surface ships were measured on the sea, and the formation mechanisms and main effect factors of the signals were analyzed. The measurement results show that the differences between the signals of the conductivity and thermal characteristic in the wake area and those in the non-wake area are obvious, and the differences are directly proportional to the vertical temperature gradient in the seawater and the tonnage, draught and speed of a target ship.