RESEARCH PAPERS: Advanced Energy Systems

Pressure-Gain Combustion: Part I—Model Development

[+] Author and Article Information
L. Narayanaswami

Embry-Riddle Aeronautical University, Daytona Beach, FL 32114

G. A. Richards

U.S. Department of Energy, Morgantown Energy Technology Center, Morgantown, WV 26507-0880

J. Eng. Gas Turbines Power 118(3), 461-468 (Jul 01, 1996) (8 pages) doi:10.1115/1.2816668 History: Received October 27, 1994; Revised October 10, 1995; Online November 19, 2007


A model for aerodynamically valved pulse combustion is presented. Particular emphasis is placed on using the model equations to identify characteristic length and time scales relevant to the design of pressure-gain combustors for gas turbine applications. The model is a control volume description of conservation laws for several regions of the pulse combustor. Combustion is modeled as a bimolecular reaction. Mixing between the fresh charge and the combustion products is modeled using a turbulent eddy time estimated from the combustor geometry and flow conditions. The model equations identify two characteristic lengths, which should be held constant during combustor scaleup, as well as certain exceptions to this approach. The effect of ambient operating pressure and inlet air temperature is also discussed.

Copyright © 1996 by The American Society of Mechanical Engineers
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