Numerical Investigation for Spray Angles of Dual Swirl Injector

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Journal of the Korea Institute of Military Science and Technology 2003;6(4):132-144.

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Dual Swirl 인젝터의 분산각에 관한 해석적 연구

정해승, 김선진

¹충남대학교 기계공학과 대학원
²청양대학 소방안전관리과

Abstract

Numerical analysis of the spray angles of Dual swirl injector were investigated to obtain basic design data and to predict the combustion performance. Using the commercial thermal hydraulic program, discharge coefficients and spray angles were numerically analyzed with recess length, pressure drop, velocity ratio, mixture ratio and back hole length. Water was used as simulants for oxidizer and fuel, respectively to compare the experimental results. Swirl injectors were designed to inject oxidizer of 70.5g/s and fuel of 29.5g/s at the pressure drop of 1MPa and two recess lengths were considered. In addition, the effect of injector geometry coefficient and velocity ratio on the discharge coefficient was studied.

Key Words: LRE(Liquid Rocket Engine), swirl injector, spray angle