CUED Publications database

Large-eddy simulations and measurements of a small-scale high-speed coflowing jet

Eastwood, S and Eastwood, S and Tucker, P and Tucker, P and Xia, H and Xia, H and Dunkley, P and Dunkley, P and Carpenter, P and Carpenter, P (2010) Large-eddy simulations and measurements of a small-scale high-speed coflowing jet. AIAA Journal, 48. pp. 963-974. ISSN 0001-1452

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Abstract

Measurements and predictions are made of a short-cowl coflowing jet with a bypass ratio of 8:1. The Reynolds number is 300,000, and the inlet Mach numbers are representative of aeroengine conditions. The low Reynolds number of the measurements makes the case well suited to the assessment of large-eddy-simulation-related strategies. The nozzle concentricity is carefully controlled to deal with the emerging metastability issues of jets with coflow. Measurements of mean quantities and turbulence statistics are made using both laser Doppler anemometry and particle image velocimetry. The simulations are completed on 6× 106, 12× 106, and 50 × 106 cell meshes. To overcome near-wall modeling problems, a hybrid large-eddy-simulation-Reynolds-averaged-Navier-Stokesrelated method is used. The near-wall Reynolds-averaged-Navier-Stokes layer is helpful in preventing nonphysical separation from the nozzle wall.Copyright © 2010 by the American Institute of Aeronautics and Astronautics, Inc.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Fluid Mechanics
Depositing User: Cron job
Date Deposited: 16 Jul 2015 13:08
Last Modified: 29 Aug 2015 04:30
DOI: 10.2514/1.44534