Numerical Analysis of Flow Characteristics and Performance Based on the Shape and Position of the Center Body Diffuser for High-Altitude Test Facility

Jongwon Lee; Hong-Jip Kim

doi:10.6108/KSPE.2026.30.5.001

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2026 Vol.30, Issue 5 Next Page

RESEARCH PAPERS

Numerical Analysis of Flow Characteristics and Performance Based on the Shape and Position of the Center Body Diffuser for High-Altitude Test Facility 고고도 모사용 Center Body Diffuser의 CB 형상 및 위치에 따른 유동 특성 및 성능 분석을 위한 수치적 연구

31 October 2026. pp. 1-11

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Abstract

This study numerically analyzed the flow characteristics and performance of the Center Body Diffuser (CBD) used in the High-Altitude Test Facility (HATF). The effects of the contraction angle of the Center Body (CB), a key design parameter of the CBD, and the distance between the CB and the nozzle on the internal flow, pressure recovery, and high-altitude simulation performance were evaluated. As the contraction angle increased, the pressure recovery performance improved, accompanied by a corresponding rise in the wall temperature of the CB. Changes in the distance between the CB and the nozzle also influenced the pressure recovery and high-altitude simulating performance.

Keywords

Computational Fluid Dynamics(CFD)

Center Body Diffuser(CBD)

Center Body Contraction Angle

Distance Between Nozzle and CB

본 연구는 고고도 모사용 시험 설비(HATF)에 사용되는 Center Body Diffuser(CBD)의 유동 특성과 성능을 수치해석을 통해 분석했다. CBD의 중요 설계 인자인 Center Body(CB)의 수축부 각도(θc)와 노즐과의 거리(Ld) 변화가 내부 유동, 온도 분포 및 고고도 모사 성능에 미치는 영향을 평가했다. θc가 증가할수록 압력 회복 성능은 향상됐으며, CB 벽면에서의 온도 상승 또한 증가하였다. Ld의 변화 또한, 내부 유동 및 온도와 고고도 모사 성능에 영향을 주는 것을 확인했다.

키워드

전산유체역학

센터바디 디퓨저

센터바디 축소각

노즐-센터바디 간 거리

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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 : 30
No :5
Pages :1-11
Received Date : 2026-03-20
Revised Date : 2026-06-10
Accepted Date : 2026-07-15
DOI :https://doi.org/10.6108/KSPE.2026.30.5.001

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

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