CFX吸气式发动机性能测试实验模拟

摘要脉动喷气发动机与传统吸气式发动机截然不同。它的推力由脉动燃烧引起的间歇式的高温高压燃气产生。这使得脉动喷气发动机燃烧效率较高，结构简单轻巧，污染排放低。种种优点使其成为一种潜力很高的推进方式。42568

经过对实验要求的分析，本文为研究脉动喷气发动机性能设计并搭建了综合实验台。这一实验台由燃油供给、红外热像测温、燃烧产物分析、瞬态压力及平均温度测量、发动机台架、点火系统和数据采集等部分组成。经过调试后，对该发动机进行了性能测试。得到了燃烧产物各组分浓度、燃气温度、压力脉动等性能数据，并分析得出了发动机启动与稳定工作时的各参数脉动规律。最后利用CFX对有阀式脉动喷气发动机所涉及的周期性脉动燃烧进行了数值模拟。

关键词脉动喷气发动机性能测试实验台数据分析数值模拟

毕业论文设计说明书外文摘要

Title The Performance Test of Air-breathing Engine

Abstract

There is a great difference between pulse jet engine and traditional air-breathing engine. The thrust of pulse jet engine is generated by the intermittent gas with high temperature and pressure, which is yielded by pulse combustion. Thus the pulse jet engine has higher combustion efficiency, lighter structure weight and less pollution. All these benefits lead it to be a hopeful propulsion type.

After analyzing the demand of experiment, a comprehensive engine experiment platform has been designed and put up for studying the performance of pulse jet engine. The platform consists of fuel supplying, infrared temperature measurement, combustion product analysis, transient pressure and ambient temperature measurement, engine bench, ignition system and data collection system, etc. After commissioning, the performance of the engine has been tested. The characteristics, such as the concentration of the combustion products, the gas temperature and pressure pulsation, are measured, and the pulsation rules of each parameters, when the engine starts and works stably, are concluded. In the end, the numerical simulation was carried out by using CFX to simulate the periodic pulse combustion of the valve type pulse jet engine.

Keywords pulse jet engine performance test experiment platform data analysis numerical simulation

1 绪论 1

1.1 脉动燃烧国内外研究概况 1

1.2 脉动喷气发动机 3

1.3 本文主要研究内容 5

2 发动机综合性能实验台设计 7

2.1 实验台总体 7

2.2 子系统设计 9

2.2.1 燃油供给子系统 9

2.2.2 红外热像测温子系统 10

2.2.3 燃烧产物分析子系统 11

2.2.4 瞬态压力及平均温度测量子系统 12

3 发动机综合性能实验台调试 15

3.1 传感器标定 15

3.2 测试软件应用 17

3.2.1 测试软件简介 17

3.2.2 测试软件标定与测量 18

4 实验数据分析 CFX吸气式发动机性能测试实验模拟:http://www.lwfree.com/jixie/lunwen_43052.html