摘要
在原有自行设计的多引射旋转预混燃烧器基础上,利用FLUENT软件对该燃烧器的引射器的喷嘴入口长度参数进行优化.综合考虑引射器的引射系数、混合燃气在出口处的一次空气系数和混合当量比系数,优化精度达到1mm.采用二分搜索法搜索引射系数为最佳的工况——最佳的喷嘴入口长度;再以最佳工况为中心,选取5个工况分析出口的一次空气系数和混合当量比系数,综合考虑并最终得出最优喷嘴入口长度参数.结果表明,最优喷嘴入口长度为距空气入口5 mm处,并分析了此时各横截面和中心轴线上的速度、压力分布情况.
This paper optimizes parameter of the nozzle inlet length of a self-designed ejector that was installed in a multi ejector tangential premixed burner by using FLUENT software.3parameters are considered comprehensively：the ejecting ratio,primary air coefficient and mixed equivalence ratio coefficient.Optimization precision is 1 mm.Firstly,searching the best working condition—the best nozzle inlet length that the ejector coefficient is best by using the binary search;once again,analyzing primary air coefficient and mixed equivalence ratio coefficient of the mixed gas in the outlet section of the 5conditions that is selected centering on the best working condition,and obtaining the optimal parameter of the nozzle inlet length by considering comprehensively the ejecting ratio,primary air coefficient and mixed equivalence ratio coefficient of the mixed gas in the outlet section of the 5conditions.The results show that the optimal parameter of the nozzle inlet length is 5mm from the air inlet section,and analyzing the velocity and pressure distribution of the cross section and the central axis of the condition,which is the optimal nozzle inlet length.
出处
《杭州电子科技大学学报（自然科学版）》
2016年第2期89-92,96,共5页
Journal of Hangzhou Dianzi University：Natural Sciences
基金
浙江省自然科学基金资助项目(LY15E060007)
关键词
引射器
最优喷嘴入口长度
引射系数
一次空气系数
ejector
the optimal nozzle inlet length
the ejecting ratio
primary air coefficient
