气体燃料喷射装置的稳态流动特性研究

中国机械工程 ›› 2015, Vol. 26 ›› Issue (15): 2041-2046.

气体燃料喷射装置的稳态流动特性研究

王天波;刘梁;常思勤;朱建辉

南京理工大学，南京，210094

出版日期:2015-08-10 发布日期:2015-08-04
基金资助:
国家自然科学基金资助项目（51306090）；江苏省自然科学基金资助项目（BK20130762）

Steady-flow Characteristic of Gas Fuel Injection Device

Wang Tianbo;Liu Liang;Chang Siqin;Zhu Jianhui

Nanjing University of Science and Technology,Nanjing,210094

Online:2015-08-10 Published:2015-08-04
Supported by:
National Natural Science Foundation of China（No. 51306090）;Jiangsu Provincial Natural Science Foundation of China（No. BK20130762）

摘要/Abstract

摘要：

为了揭示气体燃料喷射装置的喷射规律，建立两种采用不同方式开启菌形阀的喷射装置仿真模型和两种采用不同密封方式的流闭型喷射装置仿真模型，通过Fluent软件进行三维稳态计算，从出流速度分布、滞止压力损失、菌形阀受到的侧向力以及背压力等方面对比分析稳态流动特性；使用有效喷射压力概念，实现对气体燃料喷射装置喷射效率的评价。研究结果表明，在一定压差条件下，流闭型喷射装置的出口稳定流速高于流开型喷射装置的出口稳定流速，流闭型喷射装置的喷射效率达56.0%，而流开型喷射效率仅有50.3%,流闭型气体燃料喷射装置稳态流动特性优于流开型喷射装置的稳态流动特性；采用平面密封方式的流闭型喷射装置喷射效率为55.2%。

关键词: 气体燃料喷射装置, 稳态流动特性, 滞止压力损失, 喷射效率

Abstract:

In order to reveal the injection characteristics of the gas fuel injection device, the 3-D steady flow situation simulation models of two kinds of injection devices in different action modes, and the other two kinds of devices in different sealing ways, were established. The steady-flow characteristics such as outflow speed, pressure loss, lateral force of poppet valve stem and back pressure of these models were compared by using Fluent. And the effective injection pressure (EIP) concept was also used to evaluate the injection efficiency of gas fuel injection device. The simulation results show that the outflow speed of pull-open injection device is higher than push-open injection device obviously under the same operating conditions. The injection efficiency of the pull-open injection device is about 56.0% high, on the other hand, the push-open injection device is 50.3% low. In general, the steady-flow characteristic of the pull-open injection device is better than that of the push-open one. The injection efficiency of the plane sealing pull-open injection device is as 55.2%.

Key words: gas fuel injection device, steady flow characteristic, stagnation pressure, injection efficiency

中图分类号:

TK434.6

王天波, 刘梁, 常思勤, 朱建辉. 气体燃料喷射装置的稳态流动特性研究[J]. 中国机械工程, 2015, 26(15): 2041-2046.

Wang Tianbo, Liu Liang, Chang Siqin, Zhu Jianhui. Steady-flow Characteristic of Gas Fuel Injection Device[J]. China Mechanical Engineering, 2015, 26(15): 2041-2046.

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