基于欧拉喷雾与火焰面/反应进度变量湍流燃烧模型的PRF燃料喷雾燃烧模拟研究  

Numerical Study of PRF Fuel based on Euler Spray and Unsteady-Flamelet/Progress-Variable Combustion Model

作　　者：商伟伟 何志霞 玄铁民[2] García-Oliver JM SHANG Weiwei;HE Zhixia;XUAN Tiemin;Garcia-Oliver J M(School of Vehicle and Transportation Engineering,Henan University of Science and Technology,Luoayng 471000,China;School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China;Institute for Energy Research,Jiangsu University,Zhenjiang 212013,China;CMT-Motores Térmicos,Universitat Politecnica de Valencia,Valencia E-46022,Spain)

机构地区：[1]河南科技大学车辆与交通工程学院,洛阳471000 [2]江苏大学能源与动力工程学院,镇江212013 [3]江苏大学能源研究院,镇江212013 [4]瓦伦西亚理工大学CMT-MotoresTérmicos,西班牙瓦伦西亚

出　　处：《工程热物理学报》2023年第6期1726-1735,共10页Journal of Engineering Thermophysics

基　　金：河南省高等学校重点科研项目计划(No.23A470005)。

摘　　要：在开源计算流体软件OpenFOAM环境下,将基于欧拉方法的Σ-Y喷雾模型与非稳态火焰面/反应进度变量湍流燃烧模型相耦合,发展用于高温高压环境中液体燃料喷雾湍流燃烧高精度计算模型,分别对非燃烧和燃烧工况下的五种典型参比燃料(Primary Reference Fuel,PRF)的燃油喷射雾化与湍流燃烧过程开展数值研究。结果表明:该新型耦合模型能够准确的预测PRF燃料的喷雾和着火燃烧特性;所开发的重构数值喷雾纹影图像和燃烧OH^(*)图像处理方法能够很好地捕捉到试验的滞燃期、火焰浮起长度及喷雾火焰结构;研究揭示了不同比例的PRF燃料对喷雾及着火燃烧过程的影响特性,为替代燃料在发动机上的高效应用提供了理论指导。A high precision calculation model,EulerΣ-Y spray model coupled with Unsteady-Flamelet/Progress-Variable Combustion Model under OpenFOAM environment,is developed for turbulent combustion in high temperature and high pressure environment.Numerical studies are carried out with five typical reference fuels(Primary Reference Fuel,PRF).The results show that the new coupling model can accurately predict the spray and ignition characteristics of PRFs.The reconstructed spray images and OH^(*)image processing methods can capture the ignition delay,lift-off length and flame structure.The research reveals the influence of different proportions of PRF fuel on the spray and combustion process,and provides theoretical guidance for the eficient application of alternative fuels on the engine.

关 键 词：PRF 喷雾模型 燃烧模型 数值纹影 OH^(*)重构 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]