Based on fluent of ethanol fuel nozzle internal flow field of the cold state simulation

KONG Weibin; JIANG Yingtian; LIANG Ping

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Based on fluent of ethanol fuel nozzle internal flow field of the cold state simulation
Vol. 48, Issue 6, Pages: 118-122(2018)
Published：2018
DOI：
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DOI：

KONG Weibin, JIANG Yingtian, LIANG Ping. Based on fluent of ethanol fuel nozzle internal flow field of the cold state simulation[J]. Eletric Welding Machine2018, 48(6): 118-122. DOI：

摘要

通过Mixture模型对专用割嘴的内部进行速度场和压力场数值模拟

分析割嘴内部流场的气液两相流流动状态

以及速度和压力在各部位的变化情况

研究不同压力下的氧气流对乙醇汽油燃料的速度变化以及在一定压力下的氧气流对不同速度的乙醇汽油雾化的影响情况。分析流体外部两侧的静压强的欠膨胀

认为欠膨胀射流有利于空气与液体燃料的混合。模拟结果表明

增加气液混合物的速度差可以提高割嘴出口处乙醇汽油的雾化程度

有利于充分燃烧。

Abstract

In this paper

the velocity field and pressure field numerical simulation of the special cutting nozzle are carried out by Mixture model

the flow state of gas-liquid two phase flow in cutting nozzle is analyzed

and the change of velocity and pressure at different positions are analyzed.To study the effect of oxygen flow at different pressures on the speed change of ethanol fuel and the effect of oxygen flow under certain pressure on the atomization of ethanol gasoline at different speeds.By analyzing the underexpansion of static pressure on both sides of the fluid

it is concluded that the under-expansion jet is conducive to the mixing of air and liquid fuel.The simulation results show that increasing the speed difference of gas-liquid mixture can improve the atomization degree of ethanolgasoline at the outlet of the nozzle

which is beneficial to the full combustion.