基于OpenFOAM的喷孔内部流动与近场雾化的数值模拟

中国机械工程 ›› 2016, Vol. 27 ›› Issue (01): 79-84.

基于OpenFOAM的喷孔内部流动与近场雾化的数值模拟

高永强1,2;魏明锐1,2;谭保华3;颜伏伍1,2;董卫涛1

1.武汉理工大学现代汽车零部件技术湖北省重点实验室，武汉，430070
2.武汉理工大学汽车零部件技术湖北省协同创新中心，武汉，430070
3. 湖北工业大学太阳能高效利用湖北省协同创新中心，武汉，430068

出版日期:2016-01-10 发布日期:2016-01-08
基金资助:
高等学校博士学科点专项科研基金资助项目（20130143110009）

Numerical Simulation of Internal Flow of Nozzles and Near-field Sprary with OpenFOAM

Gao Yongqiang1,2;Wei Mingrui1,2;Tan Baohua3;Yan Fuwu1,2;Dong Weitao1

1.Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan，430070
2.Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan，430070
3.Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy,Hubei University of Technology，Wuhan，430068

Online:2016-01-10 Published:2016-01-08

摘要/Abstract

摘要：

基于OpenFOAM平台，对Schnerr-Sauer空化模型的蒸发和凝结源项进行了修正，建立了一种考虑热力学效应的空化模型，并分别采用原始模型和修正空化模型对燃油在喷孔内部的流动及喷嘴近场的雾化过程进行了模拟计算。修正空化模型与原始模型相比，喷孔内部的空化强度加强，空穴范围扩大，喷孔近场区域的未扰液核变短，燃油分裂雾化更加细小，说明修正空化模型促进燃油的初次分裂及雾化。

关键词: 空化模型, 空化流, 大涡模拟, 燃油喷射雾化

Abstract:

A revised cavitation model was established considering thermal effect with modified evaporation and condensation source terms,which was based on Schnerr-Sauer cavitation model of OpenFOAM toolbox. The computations for the fuel atomization process of the orifices and near nozzles were conducted by original Schnerr-Sauer cavitation model and revised cavitation model respectively. The nozzle of revised cavitation model is more intense than that of original Schnerr-Sauer model, and the area of cavitation is wider than that of original Schnerr-Sauer model. Simultaneously, the length of unperturbed liquid core of the near nozzle region is shorter and atomization of the fuel is smaller. It is dictated that the revised cavitation model can accelerate the fuel break-up and atomization.

Key words: cavitation model, cavitation flow, large eddy simulation, fuel injection atomization

中图分类号:

KT402

高永强, 魏明锐, 谭保华, 颜伏伍, 董卫涛. 基于OpenFOAM的喷孔内部流动与近场雾化的数值模拟[J]. 中国机械工程, 2016, 27(01): 79-84.

Gao Yongqiang, Wei Mingrui, Tan Baohua, Yan Fuwu, Dong Weitao. Numerical Simulation of Internal Flow of Nozzles and Near-field Sprary with OpenFOAM[J]. China Mechanical Engineering, 2016, 27(01): 79-84.

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