水下航行器热射流多孔排放口结构仿真分析

Structure simulation analysis of the underwater vehicle thermal jet at discharge multiport

水下航行器动力系统循环冷却水经由排放口排出,与环境水体掺混换热形成热射流。热射流在环境水体中扩散、浮升并在水体表面形成红外特征。为探究排放口结构对水下航行器热射流红外特征的影响,本文采用仿真分析的方法进行研究。依托CFD计算软件平台建立水下航行器运动模型,设计不同数量、不同分布位置的排放口结构并对比热射流红外特征差异,抑制热射流红外特征,提升水下航行器热隐身性能。根据仿真计算结果可知,在排放流量相同的条件下,排放口采用两翼排列方式可以进一步加强热射流温度衰减,降低水面最高峰值温度。

The circulating cooling water of the underwater vehicle power system discharge from the discharge port,mix with the environmental water for heat exchange and form the thermal jet.The thermal jet diffuses and floats in the environ-mental water and forms infrared characteristics on the surface of the water.In order to explore the influence of the structure of the discharge port on the infrared characteristics of the underwater vehicle thermal jet,this paper uses the method of simu-lation analysis.Based on the CFD calculation software platform,the motion model of underwater vehicle is established,the number and distribution position of discharge ports are designed to compare the infrared characteristics of thermal jet,sup-press the infrared characteristics of thermal jet and improve the thermal stealth performance of underwater vehicle.Accord-ing to the simulation calculation results,under the condition of the same discharge flow,increasing the number of discharge ports and adopting the symmetrical arrangement of discharge ports can further strengthen the temperature attenuation of thermal jet and reduce the surface maximum temperature.