富氧条件下汽油机燃烧过程数值模拟与试验研究

Numerical Simulation and Experimental Research of Gasoline Engine Combustion under Oxygen-enriched Air

本文采用数值模拟和试验的方法研究进气中O2体积分数对汽油机燃烧特性的影响。根据湍流的分形特征,应用分形理论计算了湍流燃烧速度和质量燃烧率等。试验对一台单缸汽油机分别提供O2(氧气)体积分数为21%、23%、25%、27%和29%的富氧空气,分析缸内压力及放热率。借助VB语言编制计算程序,进行了计算与试验对比分析。

This paper applies numerical simulation and experimental research to investigate the effects of O2 concentration in the intake gas on combustion characteristics. Calculates the turbulent flame speed and mass fraction burnt on the basic of the fractal theory. The experiment supplies the single-cylinder gasoline engine with 21%, 23%, 25%, 27% and 29% oxygen enriched air, analyzes the press and heat release in the cylinder. All calculation results are compared with the experimental ones by the aid of VB.