中文摘要：

在连接的流动地由于油流动速度的涟漪性质和在飞机的二泵的不同频率是复杂的。在这研究， T 连接和 Y 连接的流动领域被分析用砍在 ANSYS/CFX 的压力运输(SST ) 模型软件。模拟结果与不同频率在 T 连接识别了速度山峰的变化规则，同时，旋涡和速度震惊的阶段差别在工作的 T 连接，和限制的角落存在状态被获得。尽管旋涡消失在 Y 连接，速度吃惊和压力损失仍然太大。探讨这些差错，一个弧连接被设计。基于弧连接的流动地，在连接角落的旋涡消失了，速度山峰的最大值与 T 相比衰退了 -- 并且 Y 连接。另外，有不同半径的弧连接的 8 系列被测试得到速度山峰的变化规则。通过三个连接的压力损失的计算，弧连接有最低损失价值，并且当同时，弯曲半径是 35.42 公里时，它的压力损失到达了最小的价值速度吃惊在一个低阶段减少了。

英文摘要：

The flow field in junction is complicated due to the ripple property of oil flow velocity and different frequencies of two pumps in aircraft. In this study, the flow fields of T-junction and Y-junction were analyzed using shear stress transport （SST） model in ANSYS/CFX software. The simulation results identified the variation rule of velocity peak in T-junction with different frequencies and phase-differences, meanwhile, the eddy and velocity shock existed in the corner of the T-junction, and the limit working state was obtained. Although the eddy disappeared in Y-junction, the velocity shock and pressure loss were still too big. To address these faults, an arc-junction was designed. Based on the flow fields of arc-junction, the eddy in the junction corner disappeared and the maximum of velocity peak declined compared to T-and Y-junction. Additionally, 8 series of arc-junction with different radiuses were tested to get the variation rule of velocity peak. Through the computation of the pressure loss of three junctions, the arc-junction had a lowest loss value, and its pressure loss reached the minimum value when the curvature radius is 35.42 mm, meanwhile, the velocity shock has decreased in a low phase.