What is it about?
I have used a new approach, analysis of the jet engine thermodynamic cycle, to show that boundary layer wake ingestion does not improve the engine’s fuel economy because ingestion reduces the maximum thrust of the engine. The effect is the same as putting a grid over the inlet of the engine.
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Why is it important?
Wake ingestion has attracted considerable interest because of an apparent benefit in improving the propulsive efficiency of ships and submarines. However, there has been no experimental or in flight demonstration of the benefit of boundary layer ingestion. Analysis of the hypothesis has all been purely mathematical in terms of the propulsive efficiency coefficient, and not the engine internal cycle performance.
Perspectives
I realize this result is likely to be controversial. However, I hope my physics based approach will motivate researchers to reconsider this problem from another perspective.
Dr Paul M Bevilaqua
American Institute of Aeronautics and Astronautics
Read the Original
This page is a summary of: Brayton Cycle Analysis of the Effect of Wake Ingestion on Aircraft Range, Journal of Propulsion and Power, October 2024, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/1.b39343.
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