Predictions of the Effects of High Temperature Walls, Combustion, and Knock on Heat Transfer in Engine-Type Flows

900690

02/01/1990

Event
International Congress & Exposition
Authors Abstract
Content
Consideration of the heat transfer effects in low-heat-rejection engines has prompted further study into engine heat transfer phenomena. In a previous study, an approximate solution of the one-dimensional energy equation was acquired for transient, compressible, low-Mach number, turbulent boundary layers typical of those found in engines. The current study shows that an approximate solution of the one-dimensional energy equation with arbitrarily-distributed heat release can also be obtained.
Using this model, the effects of high temperature walls, combustion, and autoignition on heat transfer can be studied. In the case of high temperature walls, the model predicts the expected behavior unless the quench distance gets very small. For combustion, the reaction must occur close to the wall for a direct effect on the heat transfer to be observed. With autoignition, instantaneous values of heat flux reach levels as high as 6 MW/m2, and oscillate in phase with the pressure wave.
Finally, a method for using this model for global heat transfer predictions is suggested.
Meta TagsDetails
DOI
https://doi.org/10.4271/900690
Pages
14
Citation
Yang, J., and Martin, J., "Predictions of the Effects of High Temperature Walls, Combustion, and Knock on Heat Transfer in Engine-Type Flows," SAE Technical Paper 900690, 1990, https://doi.org/10.4271/900690.
Additional Details
Publisher
Published
Feb 1, 1990
Product Code
900690
Content Type
Technical Paper
Language
English