Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Analysis of the Characteristics of an Aerospike Pintle Nozzle in terms of Stroke and Operating Pressure

  • Kim, Jeongjin (Agency for Defense Development, the 4th R&D Institute)
  • Received : 2020.02.10
  • Accepted : 2020.06.04
  • Published : 2020.08.31
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Abstract

The characteristics of an aerospike pintle nozzle system with excellent altitude compensation were analyzed using cold air testing. It was confirmed that reducing the stroke of the aerospike nozzle is effective in increasing the thrust. However, the results of additional numerical analysis indicated that the discharge coefficient factor was significantly lower at the maximum stroke. The Vena contracta due to the cowl reduction angle decreased the effective nozzle throat area at the maximum stroke and hindered expansion. Complementing the cowl design may thus increase the efficiency of a solid-propellant rocket engine that uses the aerospike pintle nozzle system.

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References

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