Volume 36 Issue 9
Sep.  2021
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LI Yunfeng, DENG Kangqing, LU Ruihua, QIN Peiwen, GUO Chunliang, YAN Lifan, HUANG Changlong. Numerical simulation of internal flow field in gas generator of fire extinguishing bomb[J]. Journal of Aerospace Power, 2021, 36(9): 1942-1950. doi: 10.13224/j.cnki.jasp.20200385
Citation: LI Yunfeng, DENG Kangqing, LU Ruihua, QIN Peiwen, GUO Chunliang, YAN Lifan, HUANG Changlong. Numerical simulation of internal flow field in gas generator of fire extinguishing bomb[J]. Journal of Aerospace Power, 2021, 36(9): 1942-1950. doi: 10.13224/j.cnki.jasp.20200385
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Numerical simulation of internal flow field in gas generator of fire extinguishing bomb

doi: 10.13224/j.cnki.jasp.20200385
  • 1.

    Key Laboratory of Aerospace Chemical Power Technology， Hubei Institute of Aerospace Chemical Techologh， China Aerospace Science and Technology Corporation，Xiangyang Hubei 441003，China

  • 2.

    Hubei Institute of Aerospace Chemistry Technology， China Aerospace Science and Technology Corporation，Xiangyang Hubei 441003，China

  • Received Date: 2020-09-13
  • Publish Date: 2021-09-28
    Abstract
  • In order to improve the fire-fighting performance and optimize the structure design of fire extinguishing bombs，Fluent was used to simulate the flow field in the gas generator of fire extinguishing bombs，and the flow field distribution in the bomb was adjusted by changing the opening of the gas generator and the parameters of the propellant.The calculation results showed that when the first hole distance was equal to 15 times the gas generator exhaust hole diameter，there were 5 pressure peaks of similar size and higher value on the near wall surface of the fire extinguishing bomb shell，and the pressure distribution was most conducive to the rupture of the prefabricated hole slot of the fire extinguishing bomb shell；the stronger symmetry of the exhaust holes on the gas generator in the fire extinguishing bomb indicated more uniform pressure distribution in the generator.The experimental verification showed that the pressure-time curve obtained by the simulation was in good agreement with the measured data，indicating that the model is suitable for simulation of the internal flow field of the fire extinguishing bomb.

     

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