Comparisons of Computed and Measured Mean Velocity and Turbulence Intensity In a Motored Rotary Engine

881602

10/01/1988

Event
1988 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
The first comparisons of measured and computed mean velocities, and of measured fluctuation intensities and computed turbulence intensities in a motored rotary engine are presented. The computations were performed with a recently developed three–dimensional model. The measurements were made at the Sandia National Laboratories by Dimpelfeld and Witze at several locations along the rotor housing and at two engine speeds. The measured and computed mean velocities agree to within 15% whereas the computed turbulence intensities correctly are lower than the measured fluctuation intensities by about 30% to 50%, as anticipated. Under motored conditions, the turbulence intensity tends to be rather homogeneous and of similar magnitude somewhat before and after top dead center but significantly inhomogeneous and of greater magnitude around top dead center. The comparisons suggest that predictions of mean gas velocity and of turbulence intensity can be made with the available model.
Meta TagsDetails
DOI
https://doi.org/10.4271/881602
Pages
16
Citation
Abraham, J., and Bracco, F., "Comparisons of Computed and Measured Mean Velocity and Turbulence Intensity In a Motored Rotary Engine," SAE Technical Paper 881602, 1988, https://doi.org/10.4271/881602.
Additional Details
Publisher
Published
Oct 1, 1988
Product Code
881602
Content Type
Technical Paper
Language
English