The results show that the parameter w, the ratio of the inner wall heat flux to the outer wall heat flux, has great influences on the heat transfer characteristics in bilaterally heated narrow annuli.

• 计算结果表明，环形通道内、外壁加热热流密度比的不同，对环形通道内、外壁与单相水的对流换热特性有着显著的影响。