摘要
本文以热力学第二定律作基础的(火用)分析法,来评价点燃式发动机燃烧过程中燃料能转换为热量的有效程度。考虑建立了包括有燃烧离解及平衡、气体比热变化和非稳态传热的燃烧模型,以数值分析研究了影响点燃式发动机(火用)效率的各主要因素。
An inrestigation was made on available degree of fuel change over heat in the combustion process of spark ignation engine by means of exergy (available evergy)anlysis,which is based on the second law of themodynamics and is comparing to the conventional first law analysis, so that could be given a new pespective about the quantitative energy efficiency, thus be found out the all kinds of irre-versibilities within the engines system. The combustion model is established that is involved derivasion, chemical balance,varies of specific heats and non-steady heat transfer. Meanwhile, have study the effect of some main facts on exergy efficiency oy numerical analysis.
关键词
发动机
燃烧过程
YONG效率
model analysis,exergy efficiency,nmnerical calculation
