A Model for the Instantaneous Heat Transfer and Turbulence in a Spark Ignition Engine Mechanical Engineering Department, University of Michigan

Format:

Conference/Event

Author/Creator:

Borgnakke, C. (Claus), author.

Conference Name:

1980 Automotive Engineering Congress and Exposition (1980-02-25 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1980

Summary:

The heat transfer and turbulence are modeled for a spark-ignition engine. The heat transfer is described in terms of unsteady boundary layers for both the burned and unburned gas regions. These boundary layers are influenced by both the free stream turbulence level and the rate of flame propagation. Turbulence levels are characterized by a K-ε model which includes the effects of compressibility and anisotropic behavior of the flow field. The flame propagation process is modeled using current entrainment model philosophy.The results of the modeling are illustrated for an engine having a simple pancake geometry. The major accomplishments are the development of an unsteady, compressible turbulence model and the development of an instantaneous heat transfer model. The influence of the turbulent field on the heat transfer rate is given via the turbulent Reynolds number and the integral length scale. The averaged heat transfer rate is compared with the correlations of Annand and Woschni and the shortcomings of these simpler correlations are discussed

Notes:

Vendor supplied data

Publisher Number:

800287

Access Restriction:

Restricted for use by site license