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RESEARCH PAPERS

On the Prediction of Swirling Flowfields Found in Axisymmetric Combustor Geometries

[+] Author and Article Information
D. L. Rhode

College Station, Texas; School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, Okla. 74078

D. G. Lilley

School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, Okla. 74078

D. K. McLaughlin

Torrance, Calif.; School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, Okla. 74078

J. Fluids Eng 104(3), 378-384 (Sep 01, 1982) (7 pages) doi:10.1115/1.3241855 History: Received September 02, 1981; Online October 26, 2009

Abstract

Combustor modeling has reached the stage where the most useful research activities are likely to be on specific sub-problems of the general three-dimensional turbulent reacting flow problem. The present study is concerned with a timely fluid dynamic research task of interest to the combustor modeling community. Numerical computations have been undertaken for a basic two-dimensional axisymmetric flowfield which is similar to that found in a conventional gas turbine combustor. A swirling nonreacting flow enters a larger chamber via a sudden or gradual expansion. The calculation method includes a stairstep boundary representation of the expansion flow, a conventional k-ε turbulence model and realistic accommodation of swirl effects. The results include recirculation zone characterization and predicted mean streamline patterns. In addition, an experimental evaluation using flow visualization of neutrally-buoyant helium-filled soap bubbles is yielding very promising results. Successful outcomes of the work can be incorporated into the more combustion- and hardware-oriented activities of gas turbine engine manufacturers, including incorporating the modeling aspects into already existing comprehensive numerical solution procedures.

Copyright © 1982 by ASME
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