裂缝角度对含气多孔介质热流耦合特性影响研究

Influence of fracture angle on heat flow coupling characteristics of gas-bearing porous media

为研究含裂缝多孔介质内部流体的流动和传热特性,通过热-流耦合传热实验测试对5种裂缝倾角(0°,15°,30°,150°,165°)多孔介质进行了研究。结果表明:裂缝角度γ=0°的多孔介质达到稳态需要时间最长,约为720min,传热速率最慢,适用于削弱传热应用;裂缝角度旋转方向对多孔介质内高低温流体的混合能力影响较大,裂缝逆时针旋转时,其传热速率大于裂缝顺时针旋转时传热速率,适用于强化传热应用。

To study the fluid flow and heat transfer characteristics in porous media containing cracks, five kinds of porous media with crack inclination angle 0°, 15°, 30°, 150°, 165°, respectively, were studied by heat-flow coupled heat transfer experiment. The results show that when the fracture angle, it takes the longest time of about 720 min for the porous media to reach steady state, and the heat transfer rate is the slowest, which is suitable for weakening heat transfer applications. The rotation direction of crack angle has a great influence on the mixing capacity of high and low temperature fluids in the porous media. When the crack rotates counterclockwise, its heat transfer rate is higher than that when the crack rotates clockwise, which is suitable for the application of enhanced heat transfer. The results have important theoretical significance for controlling heat transfer.