Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Spray Characteristics of Effervescent Swirl Injectors for Variable Thrust

가변추력을 위한 기체주입식 와류형 분사기의 분무특성

  • Lee, Wongu (School of Mechanical Engineering, Chungbuk National University) ;
  • Hwang, Donghyun (School of Mechanical Engineering, Chungbuk National University) ;
  • Ahn, Kyubok (School of Mechanical Engineering, Chungbuk National University) ;
  • Yoon, Youngbin (Department of Aerospace Engineering, Seoul National University)
  • Received : 2019.01.14
  • Accepted : 2019.03.10
  • Published : 2019.04.01
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Abstract

A fundamental study on a gas injection variable thrust method for thrust throttling in a liquid rocket engine was conducted. The gas injection variable thrust has the advantage of not only being able to control the thrust with a simple structure but it also increases the atomization performance through the injection pressure drop that increases in direct proportion to the density reduction. In this study, spray characteristics such as spray instability, spray pattern, spray angle, and breakup length based on changes in the liquid mass flow rate and amount of injected gas were investigated using effervescent swirl injectors.

액체로켓엔진에서의 추력조절을 위해 기체주입식 가변추력 방법에 대한 기초적인 연구를 수행하였다. 기체주입식 가변추력은 간단한 구조로 추력을 조절할 수 있을 뿐만 아니라 밀도 감소에 비례하여 증가된 분사차압에 의해 미립화 성능 증가라는 장점을 갖는다. 본 연구에서는 기체주입식 와류형 분사기를 이용하여 액체 질량유량과 기체주입량의 변화에 따른 분무 불안정, 분무형상, 분무각, 분열 길이와 같은 분무특성을 살펴보았다.

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References

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