Operating Tests of a Two-Step Opening Main Oxidizer Shut-off Valve

Moongeun Hong

doi:10.6108/KSPE.2024.28.2.075

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2024 Vol.28, Issue 2 Preview Page Next Page

TECHNICAL PAPERS

Operating Tests of a Two-Step Opening Main Oxidizer Shut-off Valve 2단계 개방 연소기 산화제 개폐밸브 작동시험

30 April 2024. pp. 75-82

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Abstract

Recently, we have developed a shut-off valve for a liquid rocket engine that can supply a reduced amount of oxidizer during ignition and start-up. By partially opening the valve and supplying a small quantity of oxidizer, it is possible to enhance ignition reliability and achieve flexible engine start-up. This paper presents the results of operating tests performed on a two-step opening oxidizer shut-off valve, which enables gradual control of the oxidizer supply amount. Experimental tests were conducted to validate the operational characteristics of the valve by adjusting the orifice diameter, which regulates the pilot gas pressures. The tests confirmed the valve’s performance, including its extremely short operating time required during the ignition and starting sequence of the actual engine.

Keywords

Oxidizer Shut-off Valve

Poppet Valve

Partial Opening

Liquid Rocket Engine

액체로켓엔진의 점화 및 시동 과정에서 짧은 시간 동안 정격 유량보다 적은 양의 산화제를 공급할 수 있는 산화제 개폐밸브가 개발 중이다. 밸브의 부분 개방을 통해 소량의 산화제를 선공급함으로써 엔진 점화 신뢰성을 높이고 유연한 엔진 시동을 구현할 수 있다. 본 논문에서 산화제 공급량의 단계적 조절이 가능한 연소기 산화제 개폐밸브에 대한 작동시험 내용을 소개하기로 한다. 구동가스 공급량을 조절하는 오리피스 지름 변화에 따른 밸브 작동특성을 시험적으로 확인하였다. 또한 실제 엔진의 점화 및 시동 과정에서 요구되는 매우 짧은 밸브 작동시간 등 밸브의 주요 작동 성능의 건전성을 시험을 통해 검증하였다.

키워드

산화제 개폐밸브

포핏 밸브

부분개방

액체로켓엔진

References

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Information

Publisher :The Korean Society of Propulsion Engineers
Publisher(Ko) :한국추진공학회
Journal Title :Journal of the Korean Society of Propulsion Engineers
Journal Title(Ko) :한국추진공학회지
Volume : 28
No :2
Pages :75-82
Received Date : 2023-12-04
Revised Date : 2024-03-23
Accepted Date : 2024-03-26
DOI :https://doi.org/10.6108/KSPE.2024.28.2.075

Journal of the Korean Society of Propulsion Engineers ISSN:1226-6027(Print) 2288-4548(Online) 한국추진공학회지

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