Design and Development of a Research Combustor for Lean Blow-Out Studies

[+] Author and Article Information
G. J. Sturgess, D. G. Sloan

Pratt & Whitney, East Hartford, CT 06108

A. L. Lesmerises

WRDC/POSF, Wright-Patterson AFB, OH 45433

S. P. Heneghan, D. R. Ballal

University of Dayton, Dayton, OH 45429

J. Eng. Gas Turbines Power 114(1), 13-19 (Jan 01, 1992) (7 pages) doi:10.1115/1.2906297 History: Received January 16, 1990; Online April 24, 2008


In a modern aircraft gas turbine combustor, the phenomenon of lean blow-out (LBO) is of major concern. To understand the physical processes involved in LBO, a research combustor was designed and developed specifically to reproduce recirculation patterns and LBO processes that occur in a real gas turbine combustor. A total of eight leading design criteria were established for the research combustor. This paper discusses the combustor design constraints, aerothermochemical design, choice of combustor configurations, combustor sizing, mechanical design, combustor light-off, and combustor acoustic considerations that went into the final design and fabrication. Tests on this combustor reveal a complex sequence of events such as flame lift-off, intermittency, and onset of axial flame instability leading to lean blowout. The combustor operates satisfactorily and is yielding benchmark quality data for validating and refining computer models for predicting LBO in real engine combustors.

Copyright © 1992 by The American Society of Mechanical Engineers
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