Performance of a Supersonic Combustor with Tandem Cavity Flameholder According to the Fuel Injection Hole Configuration

Inyoung Yang; Sanghoon Lee; Yang Ji Lee; Kyungjae Lee; Seung-Min Jeong

doi:10.6108/KSPE.2025.29.3.027

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2025 Vol.29, Issue 3 Preview Page Next Page

RESEARCH PAPERS

Performance of a Supersonic Combustor with Tandem Cavity Flameholder According to the Fuel Injection Hole Configuration 직렬 공동형 보염기가 있는 초음속 연소기에서 연료 분사구 형상에 따른 성능

30 June 2025. pp. 27-36

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Abstract

This study conducted an experimental investigation to evaluate the effects of injector geometries on the combustion characteristics of a kerosene-fueled tandem cavity direct-connect supersonic combustor with regenerative cooling channels. A high-enthalpy flow at Mach number of 2.0 was supplied using both electric and vitiated air heaters. Four injector configurations, with varying exit areas and numbers, all maintaining the same mass flow rate, were utilized. The flame stabilization and combustion performance of each injector configurations were classified through quantitative analysis using wall static pressure distribution, specific fuel consumption rate, and fuel heating, and qualitative analysis through flame visualization images. Additionally, it is suggested that an increase in the heat exchanger surface area and modifications to the cooling channels are necessary to anchor a stable flame under higher fuel flow conditions.

Keywords

Supersonic Combustor

Regenerative Cooling

Injector Hole Configuration

Dual-Mode Ramjet Combustor

Liquid Hydrocarbon

본 연구에서는 재생냉각 채널을 가지는 케로신 연료 직렬 공동형 직접 연결식 초음속 연소기에서 분사기 형상에 따른 연소 특성 확인을 위한 실험 연구를 수행하였다. 전기식 및 연소식 공기 가열기를 함께 사용하여 마하수 2.0의 고 엔탈피 유동이 공급되게 하였다. 분사구 면적 및 개수가 조절된, 동일한 유량을 가진 총 4가지의 분사구 형상이 활용되었다. 각 분사구 형상의 화염 안정화 및 연소 성능을 벽면 정압력 분포, 비연료 소모율, 연료의 가열량을 이용한 정량적 분석 및 화염 가시화 사진을 통한 정성적 분석으로 분류하였다. 보다 높은 연료 유량 조건에서 안정적 화염유지를 위하여, 열 교환 면적 증가 및 냉각 채널의 변화가 필요함을 알 수 있었다.

키워드

초음속 연소기

재생 냉각

분사구 형상

이중 모드 램젯 연소기

액체 탄화 수소

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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 :3
Pages :27-36
Received Date : 2024-11-08
Revised Date : 2025-04-07
Accepted Date : 2025-05-06
DOI :https://doi.org/10.6108/KSPE.2025.29.3.027

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

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