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Numerical simulation study on the interaction between hydrogen flame and particle flame in scramjet

Junjie Li1, Suofeng Han1, Wenxue Han1, Ronggang Wei1, Chunbo Hu1, and Chao Li2

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Phys. Rev. Fluids 9, 063201 – Published 24 June, 2024

DOI: https://doi.org/10.1103/PhysRevFluids.9.063201

Abstract

Research on scramjet engines using hydrogen as fuel has achieved significant progress. To further enhance the performance of scramjet engines, the concept of using composite fuels comprising high-density powder fuel and hydrogen has been proposed. Current research focuses primarily on how hydrogen flames facilitate the heat release of powder fuels, but there has been limited investigation into the effects of powder injection on hydrogen flame flow-field parameters. Addressing this issue, numerical simulation methods are employed to optimize the hydrogen injection strategy in a two-stage cavity scramjet engine. Subsequently, the study focuses on the influence of particle injection expansion angle (0°, 15°, 30°, 45°) and particle injection swirl (0, 0.2, 0.3, 0.4) on hydrogen flame flow-field parameters. The computational results indicate that when the hydrogen injection flow rate is 1 g/s in both stages of the cavity, the hydrogen flame flow field exhibits higher temperature and Mach numbers. Expanding the particle injection expansion angle and increasing the particle injection swirl can enhance the combustion efficiency of boron particle. Injecting powder fuel into the aforementioned hydrogen flame flow field leads to a decrease in flame flow-field temperature.

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Information

Phys. Rev. Fluids 9, 063201– Published 24 June, 2024
  • Received 26 March 2024
  • Accepted 30 May 2024
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