斯特林发动机中天然气扩散燃烧的数值分析  

A numerical study of methane-air flame on stirling combustor

作　　者：汪海贵[1] 朱辰元[2] 薛飞[2] 阎珽[2] 王芝秋 

机构地区：[1]哈尔滨工程大学动力与核能学院,黑龙江哈尔滨150001 [2]中国船舶重工集团公司第七一一研究所,上海201203

出　　处：《舰船科学技术》2005年第5期32-37,共6页Ship Science and Technology

基　　金：上海市科委重大科技攻关项目(023012004)

摘　　要：本文应用数值模拟,对斯特林发动机中天然气的燃烧进行了全尺寸三维模拟。空气预热温度、旋流数和过量空气系数对斯特林燃烧室速度场、温度场分布以及排放有重要影响,本文分别对这些参数进行了优化。预测了优化后燃烧室的速度场、温度场的分布,以及NOx和CO的浓度场分布,得到了吸热部件周围的流动形式。模拟结果为抑制NOx和CO的排放和进一步提高换热效率以及发动机的效率提供了指导。This text applying numerical method launch the full-size 3-D simulation of natural gas burning inside Stirling machine. The air preheat temperature, swirler number and excess air ratio is mainly factor that influence the Stirling combustor＇s velocity and temperature distribution and exhaust level. These parameters have been optimized. The distuibution of velocity and temperature inside the optimized combustor has been predicted. And the exhausts mass concentration of NOx and CO has also been predicted. The flow through the heat exchanger is showed. The simulation result will be the guide for the restraint of NOx and CO and improving the heat exchange and the engine efficiency.

关 键 词：斯特林发动机 天然气 扩散燃烧 数值模拟 

分 类 号：TK1[动力工程及工程热物理—热能工程] TK124