温度梯度环境中潜艇尾流热特征的试验研究

改进了用于实验室热尾流测量的温度测量系统,提高了系统的集成度和抗干扰能力。在水槽中实验研究了螺旋桨推进潜艇模型在有、无温度分层流体中尾流的热特征,得到两种条件下尾流的温度分布和信号衰减规律,分析了两种尾流信号的形成机理及其影响因素,表明在温度分层环境中＂冷尾流＂信号对探测和识别水下航行的潜艇更为有利,所得结果可为红外反潜和潜艇红外隐身提供更加切合实际的理论支撑。

Experimental study of the thermal characteristic of submarine wake in the temperature stratified flow

In order to advance the integration level and the anti-jamming capability of the system,this paper improves the temperature measure system which is used in measuring thermal wakes in the laboratory.The thermal characteristic of thermal wake of the submarine model driven by screw propeller was studied in the flow with or without thermal stratification in the water tank,and temperature distribution of the wake and the signal decay laws were obtained under the two conditions.The formation mechanisms and main effect factors of the wake signals were analyzed,and it shows that ＂the cold wake＂ signal is more beneficial of detecting and distinguishing underwater submarine.The results obtained can provide much more practicable theoretical support for the development of technology in infrared detection of submarine and its infrared stealth.