Volume 31 Issue 8
Aug.  2016
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CHI Hong-wei, WEI Zhi-jun, LI Biao, WANG Li-he, WANG Ning-fei. Influence of combustor shape on self-ignition in solid fuel scramjet[J]. Journal of Aerospace Power, 2016, 31(8): 1985-1994. doi: 10.13224/j.cnki.jasp.2016.08.025
Citation: CHI Hong-wei, WEI Zhi-jun, LI Biao, WANG Li-he, WANG Ning-fei. Influence of combustor shape on self-ignition in solid fuel scramjet[J]. Journal of Aerospace Power, 2016, 31(8): 1985-1994. doi: 10.13224/j.cnki.jasp.2016.08.025

Influence of combustor shape on self-ignition in solid fuel scramjet

doi: 10.13224/j.cnki.jasp.2016.08.025
  • Received Date: 2014-11-19
  • Publish Date: 2016-08-28
  • The transient self-ignition mechanism of PMMA (polymethylmethacrylate) and the effect of combustor shape on self-ignition in solid fuel scramjet with cavity were simulated numerically. An unsteady two-dimensional axisymmetric RANS (Reynolds-averaged Navier-Stokes) equation, SST(shear stress transport) k-ω turbulent model, finite-rate/eddy dissipation reaction model were solved numerically. Main conclusions are as follows: the reactants reach the ignition temperature when the heat of reaction accumulates and increases continuously within the residual time provided by the cavity, so the self-ignition is permitted in solid fuel scramjet. The cavity length, cavity diameter, convergence angle and the cylindrical section diameter of the combustor are the main influential factors to the self-ignition. A step type cavity is suggested to enhance the self-ignition performance.

     

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