The local head loss of tee could be calculated with the determination of local resistance coefficient by CFDsimulation and test. Based on the mesh-independent feature identified, the flow field inner tee was numerically simulatedby the standard k - ε turbulent model and SIMPLEC algorithms, which has revealed the mainstream was obliged to turn tothe opposite side of tee junction, and a rise in pressure drop between upstream and downstream was caused as a result.Furthermore, the frictional resistance coefficient was calculated for eliminating the frictional head loss of model, whichdecreased from 0.0207 to 0.0133 when the inlet velocity increased from 1 m/s to 12 m/s. Additionally, the local resistancecoefficients of tee at flow conditions were attained, and the quadratic polynomial between the local resistance coefficientand flux ratio was presented due to the influence of branch on mainstream. Through the test, the simulation result has beencompared and the effectiveness of simulation has been verified.
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机译：通过CFD模拟和测试确定局部阻力系数，可以计算出三通的局部水头损失。基于确定的与网格无关的特征，通过标准的k-ε湍流模型和SIMPLEC算法对流场内三通进行了数值模拟，这表明主流不得不转向三通的相对侧，并且压降上升此外，计算了摩擦阻力系数以消除模型的摩擦压头损失，当入口速度从1 m / s增加到12 m / s时，摩擦阻力系数从0.0207减小到0.0133。此外，获得了三通在流动条件下的局部阻力系数，并且由于支路对主流的影响，提出了局部阻力系数与通量比之间的二次多项式。通过测试，对仿真结果进行了比较，验证了仿真的有效性。
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