摘要
本文运用有限体积法,采用结构化六面体网格和k-ε湍流模型来求解三维N-S方程,对不同宽高比的内置V型扰流肋片的直冷却通道在入口雷诺数为20 000时的流动与换热特性进行数值模拟。分析了不同通道宽高比对肋间壁面的流动换热情况,并对W/H进行全局寻优。结果表明,带肋直通道的整体换热效果和综合冷却效率分别与W/H呈近似的函数关系,W/H为4.5时的通道整体换热效果最好,W/H为0.35时的通道综合冷却效率最佳。
A finite volume method with hexahedral structured meshes and k-ε turbulence model was used to solve the three dimensions compressible Navier-Stokes equations in the paper. Numerical simulation was conducted to investigate flow and heat transfer properties in rectangular channel of different aspect ratios with v-shaped disturbed flow rib at inlet Reynolds number of 20 000. Analyzing the different passage aspect ratio W / H that affects the heat transfer and flow loss at the wall between the ribs. Then,conduct global optimization to W / H. The numerical result shows that the overall effect of heat transfer and integrated cooling efficiency of straight cooling channels with ribs both are approximated functions with W / H. The overall effect of heat transfer of the channel with the aspect ratio is 4. 5that is best,the channel integrated cooling efficiency is optimal when the aspect ratio is 5. 2.
出处
《燃气轮机技术》
2015年第1期29-34,共6页
Gas Turbine Technology
基金
东北电力大学博士科研启动基金项目(编号:BSJXM-201207)
关键词
燃气轮机
V型扰流肋
宽高比
全局寻优
数值模拟
gas-turbine
v-shaped disturbed flow rib
aspect ratio
overall optimization
numerical simulation
