Accession Number:

ADP013624

Title:

Industrial Applications of LES in Mechanical Engineering

Descriptive Note:

Conference paper

Corporate Author:

TOKYO UNIV (JAPAN) INST OF INDUSTRIAL SCIENCE

Report Date:

2001-08-01

Pagination or Media Count:

12.0

Abstract:

This paper describes industrial applications of LES with a particular emphasis on internal-flow simulations of turbomachinery and simulations of aeroacoustics. The aerodynamic sound is assumed to be generated by flows, at relatively low Mach numbers, around an object, and it is therefore calculated from fluctuating surface-pressure as obtained by the LES. In order to deal with a moving boundary interface in the flow field, a form of the finite-element method in which overset grids are applied from multiple dynamic frames of reference has been developed. The overset-grid approach is also applied to increase the grid resolution around the body of interest for computations in the field of aeroacoustics. The method is implemented as a parallel program by applying a domain-decomposition programming model. The validity of the proposed method is shown through two numerical examples prediction of the internal flows of a hydraulic pump stage and prediction of the far-field sound that results from unsteady flow around an insulator mounted on a high-speed train.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE