空调水管等径分流三通阻力系数随管径、流速的变化规律
Variation laws of resistance coefficient of equal-diameter shunt tee of air conditioning water pipes with pipe diameter and flow rate
摘要：
采用数值模拟方法,得到不同流速下DN80空调水管等径分流三通的局部阻力系数,并通过全尺寸实验验证了模拟结果的准确性。模拟了不同管径管道中等径分流三通在不同流速下直流方向和旁通方向的局部阻力系数,以及DN100管道中不同流量比情况下直流方向和旁通方向的局部阻力系数。结果表明:随着流速的增大,2个方向的局部阻力系数均呈增大趋势;随着流量比的增大,2个方向局部阻力系数均呈现先减小后增大的趋势。
Abstract：
Numerical simulation is used to obtain the local resistance coefficients of equal-diameter shunt tees in DN80 air conditioning water pipes at different flow rates, and the accuracy of the simulation results is verified by full-size experiments. The local resistance coefficients in the direction of direct current and bypass of equal-diameter shunt tees in different pipe diameter pipelines at different flow rates are simulated, as well as the local resistance coefficients in the direction of direct current and bypass for different flow ratios in DN100 pipelines. The results show that with the increase of flow rate, the local resistance coefficients in both directions show an increasing trend, and with the increase of flow ratio, the local resistance coefficients in both directions show a trend of decreasing first and then increasing.
Keywords:air conditioning; water pipe; equal-diameter shunt tee; local resistance coefficient; flow rate; pipe diameter; flow ratio