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- W2359667789 abstract "Installation of elbow with large bending radius in the LNG pipeline will fail sometimes because of limited space. To solve this problem,the numerical simulation of the flow field in the LNG pipeline is performed. First,structural grids are divided by Gambit software,then,numerical simulation is performed by Fluent software. The boundary conditions are set as the velocity inlet and pressure outlet,and RNG k-e turbulence model and SIMPLIE coupling method are used. Taking pipeline with DN 50 and DN 100 as the research objects,the impact of flow velocity on the pressure is studied,and the results show that the higher velocity of flow is,the lower pressure in elbow is,so the necessity of controlling the velocity of flow is fully demonstrated. Under the premise of limiting the inlet velocity at 3 m / s,the flow fields in elbow 90° with different diameters and different bending radius are simulated. Compared with the elbow with bending radius of 3D( D = outside diameter),when the bending radius is 1. 5 D,minimum pressure in the elbow is smaller,but the difference is very small,and the difference of minimum pressure between two kinds of elbows is less than or equal to 0. 28% of the outlet pressure.The minimum pressures of both kinds of elbows are 0. 04 MPa that is higher than the saturation pressures,without vaporization. Therefore,when the installation space is not enough,1. 5 D elbow can be used. With enough space,3D elbow can be used. The pipeline pressure stated in the engineering is usually pressure at pipe axis,for an elbow 90° with certain diameter and bending radius,the ratio of pressure difference between the axis center and inner arc center is approximately equal to the second power of velocity ratio at different flow velocities." @default.
- W2359667789 created "2016-06-24" @default.
- W2359667789 creator A5047351565 @default.
- W2359667789 date "2015-01-01" @default.
- W2359667789 modified "2023-09-23" @default.
- W2359667789 title "Numerical Simulation of Pressure Field for Elbow 90° in LNG Pipeline" @default.
- W2359667789 hasPublicationYear "2015" @default.
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