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Evaluation of multi-mode shared combustor with different flame holder designs for an innovative turbo-ramjet combined cycle engine

Author

Listed:
  • Zhang, Kai
  • Yu, Xuanfei
  • Zhang, Duo
  • Guo, Jian
  • Qin, Fei

Abstract

Air-breathing combined cycle propulsion is critical for realizing sustained long range hypersonic flying. Indexes like combustion efficiency and total pressure recovery are commonly employed in combustor design evaluations. However, the opposite trends encountered making these indexes occasionally falls short to effectively guide the design trade-offs of combustor concerning the complicated full-envelope combustion organization requirements of combined-cycle engine like FABRE. On account of this, in current study a system-level design evaluation method for FABRE multi-modal combustor is developed through integrating of combustor numerical simulations with engine performance assessment model. The method is then applied to evaluate a combustor designed with three representative flame holder schemes. Results show that the scheme without intermediate strut assembly and with half invasion depth strut assembly delivers superior performance in ramjet mode at Mach 3–4 and 5–6 respectively. The scheme with full length intermediate strut assembly nevertheless shows significant performance advantage in turbocharged mode. Considering each of the scheme evaluated possesses distinct advantage over some specified operation range, an adaptable scheme with a retractable intermediate strut assembly is identified as the optimal solution for FABRE wide-operating-range multi-modal shared combustor. This study may be helpful to provide some crucial guidance for the design of complex combustion systems.

Suggested Citation

  • Zhang, Kai & Yu, Xuanfei & Zhang, Duo & Guo, Jian & Qin, Fei, 2025. "Evaluation of multi-mode shared combustor with different flame holder designs for an innovative turbo-ramjet combined cycle engine," Energy, Elsevier, vol. 323(C).
    • Handle: RePEc:eee:energy:v:323:y:2025:i:c:s0360544225015178
    DOI: 10.1016/j.energy.2025.135875
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    References listed on IDEAS

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