Mixing Effects of Early Injection in Diesel Spray Using LES Model with Different Subgrid Scale Models Tsinghua University

Format:

Conference/Event

Author/Creator:

Zhou, Zhou, author.

Contributor:

Jia, Ming

Liu, Hong

Luo, Kai Hong

Xie, MaoZhao

Zhou, Qiang

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

Early injection timing is an effective measure of pre-mixture formation for diesel low-temperature combustion. Three algebraic subgrid models (Smagorinsky model, dynamic Smagorinsky model and WALE model) and one-equation kinetic energy turbulent model using modified TAB breakup model (MTAB model) have been implemented into KIVA3V code to make a detailed large eddy simulation of the atomization and evaporation processes of early injection timing in a constant volume chamber and a Ford high-speed direct-injection diesel engine. The results show that the predictive vapor mass fraction and liquid penetration using LES is in good agreement with the experiment results. In combustion chamber, the sub-grid turbulent kinetic energy and viscosity using LES are less than with the RANS models, and following the increasing time, the sub-grid turbulent kinetic energy and viscosity also increase and are concentrated on the spray area. In the meantime, advancing the injection timing can help achieve more homogenous mixture between the fuel and ambient gas. The distribution of the mixture is more uniform and the three-dimension and disorder structures are more obvious using the LES model

Notes:

Vendor supplied data

Publisher Number:

2013-01-1111

Access Restriction:

Restricted for use by site license