单点贫燃烧直喷射器的基础研究第一部分:空气旋流器角度和喷嘴尖端位置对喷雾特性的影响

2019/12/31   下载量： 1 次

方案摘要

方案下载
应用领域 航空航天
检测样本 航天
检测项目
参考标准 暂无

采用LaVision公司的粒子成像测速系统和喷雾几何参量测量系统。对单点贫燃烧直喷射器的喷射速度场和几何形态进行了测量。研究了空气旋流器角度和喷嘴端部位置对喷雾特性的影响。

方案下载
配置单
方案详情

Lean direct injection (LDI) is a combustion concept to reduce oxides of nitrogen (NOx) for next generation aircraft gas turbine engines. These newer engines have cycles that increase fuel efficiency through increased operating pressures, which increase combustor inlet temperatures. NOx formation rates increase with higher temperatures; the LDI strategy avoids high temperature by staying fuel lean and away from stoichiometric burning. Thus, LDI relies on rapid and uniform fuel/air mixing. To understand this mixing process, a series of fundamental experiments are underway in the Combustion and Dynamics Facility at NASA Glenn Research Center. This first set of experiments examines cold flow (non-combusting) mixing using air and water. Using laser diagnostics, the effects of air swirler angle and
injector tip location on the spray distribution, recirculation zone, and droplet size distribution are examined. Of the three swirler angles examined, 60? is determined to have the most even spray distribution. The injector tip location primarily shifts the flow without changing the structure, unless the flow includes a recirculation zone. When a recirculation zone is present, minimum axial velocity decreases as the injector tip moves downstream towards the venturi exit; also the droplets become more uniform in size and angular distribution.

上一篇 在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位
下一篇 在泰勒-库埃特湍流中，使用疏水内筒实现气泡减阻

文献贡献者

北京欧兰科技发展有限公司
金牌会员 丨 第17年
查看全部资料
推荐方案
更多

相关产品

当前位置： 仪器信息网 欧兰科技 方案 单点贫燃烧直喷射器的基础研究第一部分:空气旋流器角度和喷嘴尖端位置对喷雾特性的影响

关注

拨打电话

留言咨询