Tumble Flow and Turbulence Characteristics in a Small Four-Valve Engine

960265

02/01/1996

Event
International Congress & Exposition
Authors Abstract
Content
An experimental study on the tumble flow and turbulence characteristics in a small four-valve engine has been performed to provide better understanding of the formation and decay mechanisms of tumble and its effects on turbulence. The detailed comparison of the decay mechanisms of tumble during compression by means of two newly defined non-dimensional parameters, in addition to the tumble moment, has been effectively performed. The turbulence was analyzed in terms of turbulence intensity, integral time scales, and integral length scale. With tumble flow, the turbulence intensity at the end of compression was found to increase twice and the turbulence field became more homogeneous. The turbulence integral time scale during the compression was found to be inversely proportional to the engine speed, regardless of existence of tumble flow. However, the integral length scale is strongly affected and increased by tumble flow.
Meta TagsDetails
DOI
https://doi.org/10.4271/960265
Pages
15
Citation
Kang, K., and Baek, J., "Tumble Flow and Turbulence Characteristics in a Small Four-Valve Engine," SAE Technical Paper 960265, 1996, https://doi.org/10.4271/960265.
Additional Details
Publisher
Published
Feb 1, 1996
Product Code
960265
Content Type
Technical Paper
Language
English