Numerical Investigation of Self-Ignition Characteristics of Solid-Fuel Scramjet Combustor
| Autor: | Zhiwen Wu, Hongwei Chi, Zhijun Wei, Lihe Wang, Biao Li |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Turbulence Mechanical Engineering Aerospace Engineering Mechanics Solid fuel law.invention Physics::Fluid Dynamics Ignition system Fuel Technology Space and Planetary Science law Flame spread Combustor Scramjet Physics::Chemical Physics Aerospace engineering business Navier–Stokes equations Choked flow |
| Zdroj: | Journal of Propulsion and Power. 31:1019-1032 |
| ISSN: | 1533-3876 0748-4658 |
| DOI: | 10.2514/1.b35301 |
| Popis: | The self-ignition characteristics of a solid fuel under supersonic flow have been investigated theoretically and numerically. Time-dependent two-dimensional axisymmetric compressible Navier–Stokes equations and species transport equations are solved numerically. Turbulence closure is achieved using the shear stress transport k-ω model. Polymethylmethacrylate fuel and a global one-step reaction mechanism are used in this study. The reaction rate is determined by finite-rate chemical kinetics with the turbulence–chemistry interaction modeled by an eddy-dissipation model. The numerical results generally agree with the experimental data in the published literature. The flame spread and pressurization during the self-ignition of polymethylmethacrylate in the combustor have been studied. The effect of inlet flow conditions and the geometry of the combustor on self-ignition behavior have been analyzed. Three stages of flame spread (namely, heat accumulation, secondary recirculation zone self-ignition, and orderl... |
| Databáze: | OpenAIRE |
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