缩放管内脉动流动对流换热的数值模拟研究

Numerical simulation of convection heat transfer with pulsatile flow in the convergent-divergent tube

通过数值模拟计算,研究在不同脉动频率、脉动振幅下的管内流体脉动对缩放管的传热和阻力的影响。研究结果表明:管内流体脉动能够强化缩放管的传热效果,相比稳态时,传热被强化了约为16%;管内流体脉动在一定条件下,也会增大缩放管的沿程阻力。

The effects of pulsatile flow on heat transfer and resistance of the convergent-divergent tube under different pulse frequency and pulse amplitude were studied through numerical simulation. The results showed that heat transfer of the convergent-divergent tube was enhanced by the pulsatile flow（ about 16% compared with steady flow）,and resistance of the convergent-divergent tube was increased by the pulsatile flow under certain conditions.