摘要
通过CFD软件建立了LPG转子发动机的流动和燃烧模型,对缸内燃烧过程进行计算,并利用文献结果进行了验证。计算得出转子发动机缸内流场的变化及火焰传播过程,分析了不同当量比和不同点火提前角对缸内燃烧过程的影响。计算结果表明:缸内最高压力与温度随着当量比的增大而增大,着火期和急燃期受当量比影响较小;在当量比为0.75时,点火提前角采用54°与原点火提前角(42°)相比,提高了燃烧压力和燃烧效率。
Combustion model and turbulent flow model of LPG rotary engine was adopted in the CFD software which was used to calculate the in-cylinder combustion process. The results were validated by the results in reference. With numerical simulation, some important information in the cylinder was obtained, such as the flow field and flame propagation process. The influence of different equivalence ratio and ignition advance angle to the combustion process in cylinder was analyzed. The calculation results show that: the maximum cylinder pressure and temperature increase with the equivalence ratio, but the main combustion period was affected little. When the equivalence ratio 0.75, compared the ignition advance angle of 54° with the original one, the combustion pressure and combustion efficient were improved. The work may provide a reference for the improvement of the combustion process of LPG rotary engine and its performance.
出处
《热科学与技术》
CAS
CSCD
北大核心
2013年第3期242-248,共7页
Journal of Thermal Science and Technology
基金
江苏省六大人才高峰第八批资助项目(装备制造201127)
江苏省高校优势学科建设工程资助项目
江苏大学"拔尖人才培养工程"资助项目
关键词
LPG转子发动机
当量比
点火提前角
燃烧过程
动态模拟
LPG rotary engine
equivalent ratio
ignition advance angle~ combustion process
dynamicsimulation