船用排气引射装置计算及优化改进  

Calculation and improvement of a marine gasturbine exhaust injector

作　　者：史振 张善科 原文祺 马正军 SHI Zhen;ZHANG Shan-ke;YUAN Wen-qi;MA Zheng-jun(The 703 Research Institute of CSSC,Harbin 150078,China)

机构地区：[1]中国船舶集团有限公司第七〇三研究所,黑龙江哈尔滨150078

出　　处：《舰船科学技术》2021年第13期88-92,共5页Ship Science and Technology

基　　金：国家科技重大专项(2017-I-0011-0012)。

摘　　要：船用燃气轮机在箱装体中运行时,工作温度高、燃机表面散热量大导致箱装体内温度很高,影响箱体内电控元件及各附件的正常工作,也不利于工作人员的安全,因此船上广泛采用排气引射的方法对箱装体内进行通风冷却。本文以某型船用排气引射装置为原型进行了数值计算,发现引射系数小于10%,不满足冷却通风要求。首先对引射器进行一维计算并确定其最佳结构尺寸,然后结合船上实际安装布置情况,对改进的排气引射装置进行三维流场优化计算。结果表明,优化改进后的结构引射系数提高,满足设计要求,同时为后续的结构设计提供了重要的参考。When the marine gas turbine working in the case module,the high working temperature and the huge heat dissipation of the gas turbine let the temperature of the case module very high,this will affect the normal operation of the electronic components and accessories,it is not safe for the staff.So the exhaust injector is widespread used on the ship to cool the case module.In this thesis,the numerical simulation have been done with a marine gas turbine exhaust injector,the result show that the ejector coefficient is less than 10%,it can not meet the cooling requirement.In this paper,One-dimensional calculation has been done for the ejector and determined the optimum dimension of the structure,then,according to the real distribution,The three-dimensional flow field optimization calculation has been done to the improved exhaust ejector.The results show that the ejector coefficient of the improved structure raised,it can meets the design requirement,it is usefully to the structure design in the future.

关 键 词：排气引射器 数值模拟 优化改进 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]