Large eddy simulation for flows in low pressure turbine
讲座名称：
Large eddy simulation for flows in low pressure turbine
讲座时间：
2016-06-30
讲座人：
崔佳欢
形式：
校区：
兴庆校区
实践学分：
讲座内容：
应能源与动力工程学院张楚华教授和琚亚平副教授邀请，英国剑桥大学工程系计算流体力学实验室崔佳欢博士将于2016年6月29日至2016年7月1日访问我校，并就低压透平大涡模拟研究做学术报告，届时欢迎各位师生参与交流。
报告题目：Large eddy simulation for flows in low pressure turbine
报告时间：2016年6月30日下午3:00-5:00
报告地点：工程馆四楼会议室
报告人：崔佳欢 博士
内容简介：
Flows within the low pressure turbine are under constant disturbance. These disturbances include free stream turbulence, incoming wakes, surface roughness and so on. To achieve higher blade loading, modern blade design features a separation bubble on the suction surface under steady flow conditions. This separation bubble has to be suppressed by the flow disturbance within the real engine. Due to this advanced blade design philosophy, understanding of the disturbance environment within the low pressure turbine becomes increasingly important.
Through several eddy resolving simulations, this study covers a broad picture of the effect of different disturbances on the flow at the midspan. The free stream turbulence, incoming wakes and surface roughness are found to be effective in suppressing the separation bubble. These disturbances generate streaky structures within the boundary layer. As these streaks travel to the separated region, they trigger earlier transition and then suppress the separation bubble.
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