Computations of Transient Jets: RNG k-e Model Versus Standard k-e Model

970885

02/24/1997

Event
International Congress & Exposition
Authors Abstract
Content
The spray submodel is an important component in multidimensional models for Diesel engines. The satisfactory representation of the spray is dependent on adequate representation of turbulence in the jet which, in part, determines its spread and penetration. In this work, the RNG k-ϵ model is evaluated relative to the standard k-ϵ model for computing turbulent jets. Computations are made for both gas jets and sprays. The gas jet is computed with an adequately high degree of numerical spatial resolution of the order of the orifice diameter. In the case of the spray, achieving such a high resolution would be challenging. Since the spray has similarities to the gas jet, and the gas jet may be computed with such high resolution and adequate accuracy, firm conclusions may be drawn for it and they may be applicable to sprays. It is concluded that the RNG k - ϵ model, in general, results in predictions of greater mixing in the jets relative to the standard model.
Meta TagsDetails
DOI
https://doi.org/10.4271/970885
Pages
13
Citation
Abraham, J., and Magi, V., "Computations of Transient Jets: RNG k-e Model Versus Standard k-e Model," SAE Technical Paper 970885, 1997, https://doi.org/10.4271/970885.
Additional Details
Publisher
Published
Feb 24, 1997
Product Code
970885
Content Type
Technical Paper
Language
English