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Research Papers: Flows in Complex Systems

Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter

[+] Author and Article Information
Rao Yongchao

Graduate Research Assistant

Wang Shuli

Professor
e-mail: wsl@cczu.edu.cn

Zhou Shidong

Assistant Professor

Li Entian

Assistant Professor

Jiangsu Key Laboratory of Oil-Gas Storage and Transportation Technology,
Changzhou University,
Changzhou, 213016, China

Liu Wenming

Assistant Professor

College of Mechanical Engineering,
Changzhou University,
Changzhou, 213016, China

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received November 2, 2012; final manuscript received September 19, 2013; published online October 15, 2013. Assoc. Editor: Olivier Coutier-Delgosha.

J. Fluids Eng 136(1), 011104 (Oct 15, 2013) (9 pages) Paper No: FE-12-1549; doi: 10.1115/1.4025532 History: Received November 02, 2012; Revised September 19, 2013

An experimental study was conducted to get more insight into the flowing characteristics of single phase spiral flow in the horizontal pipe by the use of a laser Doppler velocimeter (LDV). Water was used as the working medium, and the spiral motion was produced by a vane. The vanes with different spiral angles and vane area were self-made. Influence of flow attenuation, average Reynolds number, spiral angle, and vane area on axial velocity distribution and tangential velocity distribution were studied. Turbulence intensity distribution was studied, and the spiral strength attenuation law was analyzed. The experimental results show that the vane is an efficient spiral device with low pressure drop, and it is used in pipeline, natural gas hydrate formation, and so on.

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References

Figures

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Fig. 1

Experimental apparatus flow chart: 1 water tank, 2 submersible pump, 3 valve, 4 pressure meter, 5 thermometer, 6 flowmeter, 7 experimental section, 8 spiral generator, 9 glass box, 10 laser emission and collection system, 11 computer data acquisition system

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Fig. 2

LDV system diagram: 1 He-Ne laser, 2 coolant mechanism, 3 collimator, 4 dispersion prism, 5 plane mirror, 6 differentiation converter, 7 beam separator, 8 acousto-optic modulator, 9 plane mirror, 10 convex lens, 11 experimental section profile, 12 doppler signal processor, 13 computer data acquisition system

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Fig. 4

Measurement section diagram

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Fig. 5

Axial velocity distribution from JM1 to JM5

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Fig. 6

Axial velocity distribution in different Reynolds number

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Fig. 7

The influence of spiral angle on axial velocity distribution

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Fig. 8

The influence of vane area on axial velocity distribution

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Fig. 9

Tangential velocity distribution from JM1 to JM5

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Fig. 10

Tangential velocity in different section

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Fig. 11

The influence of spiral angle on the tangential velocity

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Fig. 12

The influence of vane area on the tangential velocity

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Fig. 13

Axial turbulence intensity distribution

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Fig. 14

Tangential turbulence intensity distribution

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Fig. 15

Tangential velocity variation curve

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Fig. 16

Spiral flow intensity attenuation characteristic curve

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Fig. 17

The relation between Re and B

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Fig. 18

The error analysis on Eq. (14) results

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