有去旋进气共转盘腔内流动换热数值模拟

对左边转盘高位带去旋孔且附有内隔片的共转盘腔内的流动和换热进行了数值模拟.揭示了去旋角、旋转雷诺数、去旋喷嘴进气无量纲流量系数等参数对共转盘腔内的流动结构、压力损失和换热效果的影响.结果表明:盘腔内的总压降随无量纲流量系数的增加呈"S"形变化趋势;旋转雷诺数和冷气无量纲流量系数的增大都能增强转盘表面的换热效果;与预旋转静盘腔相比,去旋进气共转盘腔能使出口气流温度更低,冷却效果更好.

Numerical simulation of flow and heat transfer in the co-rotating cavity with de-swirl inflow

In order to investigate the flow and heat transfer performances in the co-rotating cavity with two inner shrouds and de-swirl inflow holes in its left disc,a numerical study was conducted.The effects of de-swirl angle,rotational Reynolds number and non-dimensional flow velocities on the flow and heat transfer characteristics in the co-rotating cavity were numerically simulated.The results show that the total pressure drop in the cavity exhibits an "S-curve" variation with the increase of non-dimensional mass flow coefficient.The heat transfer of the disc surface is enhanced with the increase of rotational Reynolds number and non-dimensional mass flow coefficient.The de-swirl inflow in the co-rotating cavity has better cooling efficiency than the pre-swirl inflow in the rotor-stator cavity.