THEORETICAL AND NUMERICAL STUDY ON SCAVENGE CHARACTERISTICS IN A SUBCHAMBER OP AN HCCI ENGINE

In this paper, we present the theoretical and numerical results of scavenge characteristics in a small subchamber of an HCCI(Homogeneous Charge Compression Ignition) engine. Two theoretical models are proposed in prediction of the scavenge time and the efficiency; one is the non-mixing model in which the input gas(CH4) and the existing gas(air) do not mix at all, and the other is the fully-mixed model in which the two gases are assumed to mix completely before ejection. Focus is also given to the effect on the scavenge performance of the size of the chamber outlet.

HCCI 엔진 부실내 소기특성에 대한 이론 및 수치해석적 연구