Performance Analysis of Scramjet Engine Intake with Boundary Layer Bleeding

Yang Ji Lee; Inyoung Yang; Kyung Jae Lee; Sang Hoon Lee; Jung Hwan Oh; Jin Choi

doi:10.6108/KSPE.2024.28.1.029

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RESEARCH PAPERS

Performance Analysis of Scramjet Engine Intake with Boundary Layer Bleeding 경계층 배출을 적용한 스크램제트 엔진 흡입구의 성능 분석

29 February 2024. pp. 29-37

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Abstract

A study was conducted to analyze the effect of boundary layer bleeding on the performance of the intake by multiple bleeding holes in the ramp and isolator of a scramjet intake. In this study, the presence/absence of bleeding holes, porosity and the degree of concentration of bleeding holes were used as variables, and 7 configurations including baseline(no bleed holes) were tested. As a result, compared to the baseline, the boundary layer bleeding configurations expanded the starting range of an intake and improved performance indicators. The configuration that showed the best performance was 1 mm in diameter and 10 mm in width with the lowest porosity. It is judged that it would be advantageous to distribute the bleeding holes more evenly rather than centrally or to place them on the side walls where the boundary layer is expected to develop.

Keywords

Scramjet Engine

Intake

Pitot/Static Rake

Total Pressure Recovery Rate

Mass Capture Ratio

스크램제트 엔진 흡입구의 램프와 격리부에 다수의 다공 홀을 배치하고 이를 통한 경계층 배출이 흡입구의 성능에 미치는 영향을 분석하는 연구를 수행하였다. 본 연구는 경계층 배출 홀의 유/무, 다공도, 그리고 밀집도를 변수로 하였으며, 경계층 배출 미적용(기준형상) 포함 7개 형상을 시험하였다. 결과적으로 기준형상 대비 경계층 배출 형상들이 시동 영역 확장 및 전반적인 성능 지표가 개선되었다. 전압력 회복률과 격리부 출구 마하수 등 전반적인 성능을 분석했을 때 가장 좋은 성능을 보인 형상은 다공도가 가장 낮은 지름 1 mm, 폭 10 mm로 경계층 배출 유량이 작은 것이 흡입구 성능개선에 유리함을 확인하였다. 밀집도는 중앙 편중보다 균등하게 배분하거나 경계층이 발달할 것으로 예상되는 측벽에 배치하는 것이 유리할 것으로 판단한다.

키워드

스크램제트 엔진

흡입구

피토/정압레이크

전압력 회복률

공기 포획률

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 :1
Pages :29-37
Received Date : 2023-05-29
Revised Date : 2023-12-03
Accepted Date : 2023-12-08
DOI :https://doi.org/10.6108/KSPE.2024.28.1.029

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

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References