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This study explores how different purge gas types influence thrust generation in pulse detonation engines.

April 27, 2026The Proceedings of Yamanashi District Conference0 citations

Influence of the Purge Gas Type for Thrust Force of Pulse Detonation Engine

HFHimari FujiiMetropolitan College RSRei SatoMetropolitan College SSShin SakumaMetropolitan College

Key Points

This study explores how different purge gas types influence thrust generation in pulse detonation engines.
Conducted experiments using nitrogen and argon gases as purge gases
Measured thrust produced by the engine in response to different purge gases
Compared thrust values to assess the impact of gas density
Average thrust of 0.494 N was observed with nitrogen gas purging
Average thrust increased to 0.688 N with argon gas purging
Using high-molecular-weight gases increased thrust by approximately 39%

Abstract

Pulse Detonation Engine (PDE) is a propulsion system that generates detonation waves, self-propelled combustion waves traveling at supersonic speeds, in a pulsed manner to produce thrust. This study aimed to increase momentum by using high-molecular-weight gases as the purge gas for the PDE's purging process, thereby enhancing thrust density through increased thrust per cycle. Experiments were conducted using nitrogen gas and argon gas, which has a higher density. Results showed an average thrust of 0.494 N when purged with nitrogen gas and an average thrust of 0.688 N when purged with argon gas. Using a high-molecular-weight gas for purging increased the average thrust by approximately 39%．

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