沈阳航空航天大学学报2024，Vol.41Issue(3)：30-36,7.DOI:10.3969/j.issn.2095-1248.2024.03.005
旋转对缩扩蜿蜒通道流动及换热特性影响
Influence of rotation on flow and heat transfer characteristics of con-stricted and expanded serpentine channels
摘要
Abstract
In order to explore the changes in the flow and heat transfer characteristics of the internal cold channel in turbine blades,the effects of rotation numbers 0,0.03,0.06,0.09 and 0.3 on the flow re-sistance and heat transfer capacity of constricted and expanded serpentine channels with inlet Reynolds number Re=3×104 were investigated.The results show that the Coriolis force and centrifugal force to-gether push the fluid in the center of the channel to the pressure surface,and then the upper wall of the channel is returned to form a vortex with the central fluid,thereby changing the flow structure in the channel.With the increase of the rotation number,the channel resistance coefficient shows a trend of first increasing and then decreasing.When the rotation number rises from 0 to 0.3,the channel resis-tance coefficient decreases by 53.79%.Rotation destroys the boundary layers of the suction surface and the pressure surface by strengthening the fluid disturbance to enhance the overall heat transfer capacity of the channel.When the rotation number increases from 0 to 0.3,the local heat transfer capacity of the first and second processes increases significantly higher than that of other processes,and increases by 68.49%compared with the relative stationary channel.The overall heat transfer capacity of the constrict-ed and expanded serpentine channel is increased by 21.18%compared with the stationary state.关键词
涡轮叶片/内冷通道/哥氏力/旋转/蜿蜒通道Key words
turbine blade/internal cold channel/Coriolis force/rotation/serpentine channel分类
航空航天引用本文复制引用
张鸿磊,李广超..旋转对缩扩蜿蜒通道流动及换热特性影响[J].沈阳航空航天大学学报,2024,41(3):30-36,7.基金项目
国家自然科学基金(项目编号:52376028) （项目编号:52376028）
辽宁省自然科学基金(项目编号:2022-MS-296) （项目编号:2022-MS-296）
