Open Access

ABSTRACT

Numerical Investigation on PDEs with Mixed Fuels

J. Kato¹, K. Inaba², M. Yamamoto³

1 Graduate student, Mechanical Engineering, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
2 Research Associate, Mechanical Engineering, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
3 Professor, Mechanical Engineering, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan

The International Conference on Computational & Experimental Engineering and Sciences 2007, 4(1), 25-30. https://doi.org/10.3970/icces.2007.004.025

Abstract

Pulse detonation turbine engines (PDTEs), which are used as power generation, are desirable to use hydrocarbon from the aspect of infrastructure of fuels. In the present study, we investigate the performance of PDEs using mixed hydrocarbon fuels. With the detailed 42-species and 168-step mechanism, numerical simulations on mixed-fuel-and-air PDEs are conducted. We use CH4-C3H8, CH4-H2, and C3H8-H2 as fuels, and examine characteristic features of detonations with different blend ratios. We perform calculations on the Chapman-Jouguet detonation speeds and chemical reaction lengths, and investigate ZND profiles of chemical reactions. Then we evaluate PDEs performances by changing blend ratios. These results show good agreements with theoretical results. In CH4-C3H8 case, specific impulses do not depend on the mixing ratio very much, while in other cases, they depend on the mole fraction of hydrogen.

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