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

Eastwood, Simon, Tucker, Paul, Xia, Hao, Dunkley, Paul and Carpenter, Peter (2010) Large-eddy simulations and measurements of a small scale high-speed coflowing jet. AIAA Journal, 48 (5). pp. 963-974. ISSN 0001-1452

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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 x 10(6), 12 x 10(6), and 50 x 10(6) 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.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA0349 Mechanics of engineering. Applied mechanics > TA0357 Applied fluid mechanics
Depositing User: Hao Xia
Date Deposited: 04 Mar 2013 08:16
Last Modified: 04 Mar 2013 08:16

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