湍动稳定环形分层火焰特性的实验研究

2011/05/07   下载量： 10 次

方案摘要

方案下载
应用领域 其他
检测样本 其他
检测项目
参考标准 暂无

A burner for investigating lean stratified premixed flames propagating in intense isotropic turbulence has been developed. Lean pre-mixtures of methane at different equivalence ratios are divided between two concentric co-flows to obtain annular stratification. Turbulence generators are used to control the level of turbulence intensity in the oncoming flow. A third annular weakly swirling air flow provides the flame stabilization mechanism. A fundamental characteristic is that flame stabilization does not rely on flow recirculation. The flames are maintained at a position where the local mass flux balances the burning rate, the result is a freely propagating turbulent flame front. The absence of physical surfaces in the vicinity of the flame provides free access for laser diagnostics. Stereoscopic Planar Image Velocimetry (SPIV) has been applied to obtain the three components of the instantaneous velocity vectors on a vertical plane above the burner outlet where the flames propagate. The instantaneous temperature fields have been determined through Laser Induced Rayleigh (LIRay) scattering. Planar Laser Induced Fluorescence (PLIF) on acetone has been used to calculate the average equivalence ratio distributions. Instantaneous turbulent burning velocities have been extracted from SPIV results, while flame curvature and flame thermal thickness values have been calculated using the instantaneous temperature fields. The probability distributions of these quantities have been compared considering the separate influence of equivalence ratio stratification and turbulence.

方案下载
配置单
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 部分负荷3500转/分工作状态下光学发动机缸内流动结构的多平面PIV分析

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
相关仪器 更多
相关方案
更多

相关产品

当前位置： 欧兰科技 方案 湍动稳定环形分层火焰特性的实验研究

关注

拨打电话

留言咨询