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Open AccessArticle

Force Analysis of a Circular Cylinder at Ununiformed Flow in a T Pipe Junction

1
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2
Department of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
*
Author to whom correspondence should be addressed.
Energies 2018, 11(4), 864; https://doi.org/10.3390/en11040864
Received: 1 March 2018 / Revised: 4 April 2018 / Accepted: 6 April 2018 / Published: 8 April 2018
(This article belongs to the Section Energy Fundamentals and Conversion)
Experimental and numerical investigations of force analysis acted on single circular cylinder in the T pipe junction with the effect of vanes are reported in this paper. Experiments are carried on in a small wind tunnel at five different velocity ratios (R) from 0.117 to 0.614. The mean pressure data acted on the cylinder are obtained and in turn the drag and lift. Vanes are installed at the junction to change the secondary flow in the branch duct and the angle is in the range of 90° ≤ φ ≤ 130°. Numerical studies which are validated by the experimental data help understand the flow structure for the analysis. It is found that in the T shape junction without vanes, the cylinder presents different surface mean pressure distributions at the different positions in the suction duct. As the increase of the distance from the junction to the cylinder center, the surface mean pressure distributions recover to the benchmark gradually which performs in the straight duct beforehand. Four feature points including the front/rear stagnation points and the separation points and the corresponding three divisions of flow region are analyzed in detail with the auxiliary numerical simulation of flow structure. Effect of the vanes with different angle is also discussed. Finally, the drag and lift coefficients acted on the cylinder with or without vanes are performed. View Full-Text
Keywords: force analysis; circular cylinder; ununiformed flow; T pipe junction; vanes force analysis; circular cylinder; ununiformed flow; T pipe junction; vanes
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MDPI and ACS Style

Yin, Y.; Li, S.; Wang, L.; Lin, M.; Wang, Q. Force Analysis of a Circular Cylinder at Ununiformed Flow in a T Pipe Junction. Energies 2018, 11, 864.

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