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Gas Turbine Combustion Efficiency Calculations

Gas Turbine Combustion Efficiency Calculations THE alternative definitions of combustion efficiency based on the ratio of actual to theoretical heat releases and of theoretical to actual fuel requirements are discussed in relation to the practical need for reckoning enthalpies above a datum temperature. Empirical expressions are obtained which enable the enthalpies of the reactants and the products of combustion to be calculated to an adequate standard of accuracy. The appropriate heat of combustion of the fuel is defined and the effect of temperature examined. The difference in calculated efficiencies obtainable from the alternative definitions are then determined under extreme conditions, and a practical formula developed. Finally, experimental errors in combustion efficiency determination are examined for both the heat balance and gas analysis techniques. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Gas Turbine Combustion Efficiency Calculations

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb031930
Publisher site
See Article on Publisher Site

Abstract

THE alternative definitions of combustion efficiency based on the ratio of actual to theoretical heat releases and of theoretical to actual fuel requirements are discussed in relation to the practical need for reckoning enthalpies above a datum temperature. Empirical expressions are obtained which enable the enthalpies of the reactants and the products of combustion to be calculated to an adequate standard of accuracy. The appropriate heat of combustion of the fuel is defined and the effect of temperature examined. The difference in calculated efficiencies obtainable from the alternative definitions are then determined under extreme conditions, and a practical formula developed. Finally, experimental errors in combustion efficiency determination are examined for both the heat balance and gas analysis techniques.

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Aug 1, 1950

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