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11.液体燃料横向射流雾化数值模拟

日期：2013-12-25 17:00:00 点击：

杜波¹白皓¹周康¹朱荣²孙冬柏²

（1.北京科技大学冶金与生态工程学院，北京100083；2. 北京科技大学材料学院，北京100083）

关键字：燃料与燃烧；亚音速；雾化；数值模拟

中图分类号： 文献标识码：A

摘要：雾化是液体燃料燃烧非常重要的一个过程，良好的雾化是实现液体燃料高效燃烧的前提。为了得到某燃烧器文丘里管喉口处高速气流对燃油雾化的效果，本文利用计算流体力学软件对该燃烧室中液体燃料雾化两相流场进行了数值模拟，计算采用欧拉-拉格朗日方法，混合破碎KH-RT模型，模拟结果得到了不同气流速度下液滴群SMD分布，通过对单个液滴二次破碎模拟再现了液滴在高速气流中变形破碎的整个过程。

Numerical simulation of liquid fuel spray in lateral cross flow

Du Bo¹，Bai Hao¹，Zhou Kang¹，Zhu Rong²，Sun Dong-bai²

（1.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083,China；2.School of materials engineering, University of Science and Technology Beijing, Beijing 100074,China）

Key words：fuel and combustion；subsonic velocity；atomization；numerical simulation

Abstract ： The liquid fuel atomization processes play an important role in combustion, and a good atomization result is the precondition of efficient combustion. In order to get the fuel atomization result of one combustion chamber ,which utilized high speed air flow atomizing fuel liquid at the throat of the venture tube ,CFD software was used to simulate the liquid fuel atomization and two-phase flow in this paper. The Euler Lagrange method and mixing &crushing KH-RT method were adopted during thenumerical calculation process.Upon this we got the liquid droplet distribution of SMD under different airflow velocity,and via one droplet’s secondary crushing simulation reproduceddroplets’ distortion and crushing in high speed airflow in the whole process .