Volume 41 Issue 9
Oct.  2026
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Zhao Qianpeng, Zhu Shaohua, Qin Yunpeng, et al. Direct-connection experimental investigation of an oblique detonation combustor with kerosene fuel internal injection[J]. Journal of Aerospace Power, 2026, 41(9):20240808 doi: 10.13224/j.cnki.jasp.20240808
Citation: Zhao Qianpeng, Zhu Shaohua, Qin Yunpeng, et al. Direct-connection experimental investigation of an oblique detonation combustor with kerosene fuel internal injection[J]. Journal of Aerospace Power, 2026, 41(9):20240808 doi: 10.13224/j.cnki.jasp.20240808

Direct-connection experimental investigation of an oblique detonation combustor with kerosene fuel internal injection

doi: 10.13224/j.cnki.jasp.20240808
  • Received Date: 2024-11-15
    Available Online: 2026-06-25
  • In order to investigate the combustion mechanism of oblique detonation with hydrocarbon fuel internal injection, numerical simulations and direct-connected combustion heating experiments were conducted on an oblique detonation combustor simulating a flight Mach number of 8. A small-scale oblique detonation experimental piece was designed and the aviation kerosene was used as the fuel. Fuel injection and atomization was organized through 4×Φ0.3 mm holes on a diamond-shaped strut plate positioned in the center of the flow channel. An R2 mm bump was utilized to initialize detonation and stationary combustion on a 20° wedge surface. Numerical simulations of the fuel injection mixing process and engine combustion process were performed using a 10-step, 11-component chemical reaction mechanism, and the Reynolds-averaged Navier-Stokes (RANS) equations. The results indicated that the liquid fuel evaporated within a distance of 274 mm and partially mixed with the high-speed incoming flow. Stable oblique detonation flow fields were formed on both sides of the wedge surface. The flame position and morphological characteristics were observed through optical measurements. The combustion zone remained stable within an effective experimental window of 2.2 s. The experimental results are in good agreement with the numerical simulations in terms of pressure along the flow path and characteristics of the chemical reaction zone. The research findings demonstrate the technical feasibility of internal-injection hydrocarbon fuel-based oblique detonation engines.

     

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