城门洞形风道三通局部阻力系数模拟与实验

将流体流态限定在阻力平方区,对城门洞形风道三通(分流三通、封堵三通)的局部阻力系数进行模拟,将封堵三通局部阻力系数的实验结果与模拟结果进行比较。当流动处于阻力平方区时,分流三通、封堵三通局部阻力系数稳定在某个常数附近,几乎与雷诺数无关;分流三通局部阻力系数与当量粗糙度无关。

Simulation and Experiment on Local Resistance Coefficient of Horseshoe-shaped Duct Tee

The fluid flow is limited to the resistance square area. The local resistance coefficients of the horseshoe-shaped duct tees （shunt tee and block tee） are simulated, and the experimental results of local resistance coefficient of block tee is compared with the simulation results. When flow is in resistance square area, the local resistance coefficients of the shunt tee and block tee are in the vicinity of a con- stant, almost independent of the Reynolds number, and the local resistance coefficient of the shunt tee is inde- pendent of the equivalent roughness.