Volume 32 Issue 6
Jun.  2017
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Numerical investigation of the impact of spherical ignition chamber on pulse detonation DDT process[J]. Journal of Aerospace Power, 2017, 32(6): 1313-1320. doi: 10.13224/j.cnki.jasp.2017.06.005
Citation: Numerical investigation of the impact of spherical ignition chamber on pulse detonation DDT process[J]. Journal of Aerospace Power, 2017, 32(6): 1313-1320. doi: 10.13224/j.cnki.jasp.2017.06.005
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Numerical investigation of the impact of spherical ignition chamber on pulse detonation DDT process

doi: 10.13224/j.cnki.jasp.2017.06.005
  • Received Date: 2017-05-10
  • Publish Date: 2017-06-28
    Abstract
  • The length of deflagration to detonation transition (DDT) is the key influential parameter to the single cycle time of pulse detonation engines (PDE). In order to reduce PDEs single cycle time, a new type detonation tube was designed by adding a spherical ignition chamber at the head of traditional detonation tube, meanwhile propane and air were used as fuel to study the effect of spherical ignition chamber on DDT process by 2-D numerical simulation. The numerical simulation results show that, the compression wave were frequently reflected in the ignition chamber, and then the detonation wave was formed quickly in the straight detonation tube, the length of DDT was significantly shortened. Compared with the conventional straight detonation tube, the length and time of DDT process reduced about 14% and 16.26% respectively, when the spherical ignition chamber's diameter was 1.5 times of the straight pipe's diameter.

     

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