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Physical Experiment and Numerical Simulation of "T and Arc" Shaped Three-way Pipe’s Flow Field

Author: SunZuo
Tutor: QiuXiuYun；FanShiFeng
School: Xinjiang Agricultural University
Course: Hydraulics and River Dynamics
Keywords: T-branch pipeline Numerical simulation Flow field loss of head
CLC: S271
Type: Master's thesis
Year: 2009
Downloads: 241
Quote: 3
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Abstract


T shaped three-way pipe is massively used in the agriculture and the industry.In the Agricultural irrigation,T shaped three-way pipe is used to increase the water outlet.The different structure of the three-way pipe lead to the different local loss of head,it cause a great influence on operating costs of irrigation.optimize the form of T shaped three-way pipe is a good idea to reduce the pressure of the Drip irrigation system and the local loss of head.Processing head loss is not change in the same friction drag and the same flow regime.If we want to increase the flow rate in the same boundary condition and pressure head of the inlet,we have no choice but reduce the local of head.The mainstream separates from the boundary layer,products eddy currents in the place there is producting the local loss of head.The design of better form channel is very important to reduce the local head loss.In this paper,Analyze the turbulent flow in two kind of different channel form of T shaped three-way pipe by the Numerical simulation software.Contrasted the flowing characteristics which are in the two kind of different flow channel forms of T shaped three-way pipe.In the last it get to the computed result of T shaped three-way pipe,find out which flow channel form has smaller local loss of head and obtain to the following conclusions.(1) The three-way pipe is studied in the drip irrigation system that show us the experience which is model modelling and meshing.(2) It adopted the segtegated implicit solution and the RNG K-epsilon double equation model to calculate the internal flow field distributions and the flow rules of the three-way pipe.Numerical Simulation is a good way to Hydraulic calculation.lt brings to a new idea by the computer, use less money and less Human Resources to obtaining more precise results.

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CLC: > Agricultural Sciences > Agricultural Engineering > Irrigation and water conservancy > Agricultural hydrology
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