Research Papers: Flows in Complex Systems

Experimental and Numerical Investigation on Flow Characteristics of Large Cross-Sectional Ionic Wind Pump With Multiple Needles-to-Mesh Electrode

[+] Author and Article Information
J. F. Zhang, S. Wang, M. J. Zeng

Key Laboratory of Thermo-Fluid Science
and Engineering,
Ministry of Education,
School of Power and Energy Engineering,
Xi'an Jiaotong University,
Xi'an 710049, China

Z. G. Qu

Key Laboratory of Thermo-Fluid Science
and Engineering,
Ministry of Education,
School of Power and Energy Engineering,
Xi'an Jiaotong University,
Xi'an 710049, China
e-mail: zgqu@mail.xjtu.edu.cn

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received March 9, 2018; final manuscript received August 29, 2018; published online October 5, 2018. Assoc. Editor: Shizhi Qian.

J. Fluids Eng 141(3), 031105 (Oct 05, 2018) (8 pages) Paper No: FE-18-1163; doi: 10.1115/1.4041391 History: Received March 09, 2018; Revised August 29, 2018

Ionic wind pumps have attracted considerable interest because of their low energy consumption, compact structures, flexible designs, and lack of moving parts. However, large cross-sectional ionic wind pumps have yet to be numerically analyzed and experimentally optimized. Accordingly, this study develops a large cross-sectional ionic wind pump with multiple needles-to-mesh electrode, as well as analyzes its flow characteristics using a proposed full three-dimensional simulation method validated with experimental data. To obtain a considerably high outlet average velocity, experimental studies and numerical methods are employed to optimize the pump's configuration parameters, including needle electrode configuration, needle diameter, grid size, and gap between electrodes. The breakdown voltage and highest velocity corresponding to the breakdown voltage increase with an increase in the needle tip-to-mesh gap. After parametric optimization, a maximum velocity of 2.55 m/s and a flow rate of 2868 L/min are achieved.

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Fig. 2

Physical model: (a) physical model, (b) mesh of the calculation model, and (c) simulation process

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Fig. 1

Experimental setup and ionic wind pump: (a) diagram of the experimental setup, (b) the corona electrode board, (c) the collector electrode board, and (d) diagram of the needle configuration, needle diameter, needle tip-to-mesh gap and grid unit

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Fig. 3

Verification of the simulation method

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Fig. 4

Electrical and flow field distribution (default model): (a) 3D electrical field distribution, (b) 3D flow field distribution, and (c) slice of the flow field distribution (y–z plate, x = 20 mm)

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Fig. 5

Average outlet velocity as a function of the transverse space

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Fig. 6

Average outlet velocity at different diameters of the needle electrode

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Fig. 7

Effects of different grid sizes: (a) the average outlet velocity at different grid sizes and (b) the power consumption at different grid sizes

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Fig. 8

Average outlet velocity at different needle tip-to-mesh gaps



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