A Numerical Study on Quantification of Combustion-Response Parameters of Impinging-Jet Injectors using Time-Lag Model

시간지연 모델을 이용한 충돌형 분사기의 연소응답 인자 도출 및 정량화에 관한 수치해석적 연구

This study presents relations between the time lag and interaction index of the impinging-jet injectors using time lag model in a model chamber. To analyze the response of the flame, 5% amplitude of oxidizer velocity is artificially perturbed at a resonance frequency. At the mixing point of fuel and oxidizer, which determines the characteristic length, the relationship between velocity perturbation and heat release rate is quantified by combustion parameters of interaction index and time lag. As the improved method to apply the time-lag, the method using the average velocity obtained from numerical results is suggested.