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The stydy on determination method of initial optimal nozzle expansion ratio in pintle solid rocket motor

핀틀 로켓의 초기 최적 노즐 팽창비 결정 방법 연구

  • 김중근 (국방과학연구소 1기술본부 6부) ;
  • 이영원 (국방과학연구소 1기술본부 6부)
  • Received : 2010.10.27
  • Accepted : 2011.07.26
  • Published : 2011.08.01

Abstract

In this study, determination method of initial optimal nozzle expansion in pintle rocket was investigated. The initial optimal initial nozzle expansion was decided by maximizing the mass-averaged thrust coefficient that is calculated from thrust coefficient of minimum and maximum chamber pressure. The determination of initial optimal initial nozzle expansion was equivalent to that of the minimum propellant mass which was required for obtaining the desired mission performance. The highest pressure, thrust turndown ratio and total impulse ratio effected on the initial optimal nozzle expansion. Among them, total impulse ratio had great influence on the initial optimal nozzle expansion.

본 논문에서는 핀틀 로켓의 초기 최적 노즐 팽창비를 결정하는 방법에 대해서 제시하였다. 초기 최적 노즐 팽창비는 최대/최소 압력의 추력 계수로부터 계산되는 질량 가중 추력 계수를 최대화시켜 결정하였으며 이는 주어진 임무를 수행함에 있어 소요되는 추진제무게가 최소화되는 조건과 일치한다. 초기 최적 노즐 팽창비 결정에 영향을 주는 인자는 최대 압력, 추력조절비 그리고 총추력비이며 이중에서 총추력비가 가장 큰 영향을 준다.

Keywords

References

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Cited by

  1. Thrust Characteristics of Through-type Pintle Nozzle at Operating Altitudes Conditions vol.20, pp.4, 2016, https://doi.org/10.6108/KSPE.2016.20.4.059
  2. Steady and Unsteady State Characteristics of Length Effects about Linear Pintle Nozzle vol.22, pp.3, 2018, https://doi.org/10.6108/KSPE.2018.22.3.028