A Numerical Simulation for the Three-dimensional Combustion Field in a Small GCH4-LOx Thrust Chamber with Varying Film-cooling Flow-rate

Hong Yeong Park; Yun Hyeong Kang; Jeong Soo Kim

doi:10.6108/KSPE.2025.29.1.009

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RESEARCH PAPERS

A Numerical Simulation for the Three-dimensional Combustion Field in a Small GCH₄-LOx Thrust Chamber with Varying Film-cooling Flow-rate 막냉각 유량 변이에 따른 기체메탄-액체산소 소형추력실의 3차원 연소장 수치모사

28 February 2025. pp. 9-16

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Abstract

A three-dimensional numerical simulation was conducted to calculate the cooling effects on the combustion chamber with film-cooling applied with varying coolant flow-rate. The trajectory of liquid oxygen used as both the primary oxidant and coolant was modeled by using the Discrete Phase Model (DPM) approach. While the mass flow-rate of the main propellants was fixed, the coolant flow-rate was varied to compare its effects. As a result, a significant temperature reduction near the chamber wall was observed when film cooling was applied, as evidenced by the temperature distribution along the chamber inner wall. Additionally, it was observed that the flame intensity became weakened as the coolant flow-rate increased while the shock wave structure in the plume region became more distinct.

Keywords

Film-cooling

Discrete Phase Model

GCH₄

LOx

막냉각이 적용된 연소실의 냉각제 유량에 따른 냉각 효과를 모사하고자 3차원 수치해석이 수행되었다. 주 산화제와 냉각제로 사용된 액체산소는 DPM(discrete phase model) 기법을 통해 그 거동이 계산되었으며, 주 추진제의 유량은 고정된 채 냉각제의 유량만을 변화시켜 이에 따른 효과가 비교되었다. 계산 결과, 연소실 내벽의 온도분포를 통해 막냉각이 적용될 시 벽면 부근에서의 온도 저하가 명확히 관찰되었으며, 냉각제 유량이 증가할수록 화염의 강도는 약해지는 반면, 플룸 영역 내의 충격파의 구조는 선명해짐이 관찰되었다.

키워드

막냉각

DPM, 이산상모델

기체메탄

액체산소

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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 : 29
No :1
Pages :9-16
Received Date : 2024-12-30
Accepted Date : 2025-01-02
DOI :https://doi.org/10.6108/KSPE.2025.29.1.009

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

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