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Research Papers: Flows in Complex Systems

Experimental Study of Pressure Drop-Flow Rate Characteristics of Heated Tight Porous Materials

[+] Author and Article Information
Yuxuan Liao

State Key Laboratory of Fluid Power
Transmission and Control,
Zhejiang University,
38 Zheda Road,
Hangzhou, Zhejiang 310027, China
e-mail: 290229671@qq.com

Xin Li

State Key Laboratory of Fluid Power
Transmission and Control,
Zhejiang University,
38 Zheda Road,
Hangzhou, Zhejiang 310027, China
e-mail: vortexdoctor@zju.edu.cn

Wei Zhong

School of Mechanical Engineering,
Jiangsu University of Science and Technology,
2 Mengxi Road,
Zhenjiang, Jiangsu 212003, China
e-mail: zhongwei@just.edu.cn

Guoliang Tao

State Key Laboratory of Fluid Power
Transmission and Control,
Zhejiang University,
38 Zheda Road,
Hangzhou, Zhejiang 310027, China
e-mail: gltao@zju.edu.cn

Hao Liu

State Key Laboratory of Fluid Power
Transmission and Control,
Zhejiang University,
38 Zheda Road,
Hangzhou, Zhejiang 310027, China
e-mail: hliu@zju.edu.cn

Toshiharu Kagawa

Precision and Intelligence Laboratory,
Tokyo Institute of Technology,
Yokohama 226-8503, Japan
e-mail: kagawa@pi.titech.ac.jp

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received March 7, 2015; final manuscript received February 3, 2016; published online April 22, 2016. Assoc. Editor: D. Keith Walters.

J. Fluids Eng 138(7), 071102 (Apr 22, 2016) (12 pages) Paper No: FE-15-1150; doi: 10.1115/1.4032751 History: Received March 07, 2015; Revised February 03, 2016

Tight porous materials are used as pneumatic components in a wide range of industrial applications. Such porous materials contain thousands of interconnected irregular micropores, which produce a large pressure drop (ΔP) between the upstream and downstream sides of the porous material when a fluid flows through it. The relationship between the pressure drop and flow rate (i.e., ΔP-G characteristics) is a very important basic characteristic. Temperature is one of the factors that affect the ΔP-G characteristics because variations in temperature change the viscosity and density of the fluid. In this study, we experimentally analyzed the ΔP-G characteristics of tight porous materials by heating them using an electromagnetic system. First, we experimentally investigated the change in the ΔP-G curve under the condition of constant heating power. Then, based on the Darcy–Forchheimer theory, we introduced an experimental method to determine the average temperature of the fluid. The results show that the temperature reaches approximately 500 K in the small flow rate range, which produces considerable changes in the ΔP-G curve. As the flow rate increases, the temperature decreases, and thus, the ΔP-G curve at constant heating power converges to the curve for the room temperature. Furthermore, we compared three porous materials with different permeability coefficients and porosities and analyzed the effect of these parameters on the ΔP-G characteristics. We also performed experiments at different downstream pressures to study the effect of the average density on the ΔP-G characteristics.

Copyright © 2016 by ASME
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References

Figures

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Fig. 1

Schematic of fluid flow through porous material

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Fig. 2

Test porous materials

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Fig. 3

Packing shell for test material: (a) schematic and (b) photograph

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Fig. 4

Photograph of heating system

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Fig. 6

Determination of Darcy and Forchheimer regimes using test material #3 as an example

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Fig. 7

Comparison of theoretical approximation and experimental results

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Fig. 8

ΔPθ,δθ, and ηθ versus flow rate for 79.3 W heating power

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Fig. 9

Temperature versus flow rate for 79.3 W heating power

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Fig. 10

ΔPθ,δθ, and ηθ versus flow rate for different heating powers

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Fig. 11

Average temperature versus flow rate for different heating powers

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Fig. 12

ΔPθ, δθ, and ηθ versus flow rate for different Kφ values

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Fig. 13

Average temperature versus flow rate for different Kφ values

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Fig. 14

ΔPθ, δθ, and ηθ versus flow rate for different densities

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Fig. 15

Average temperature versus flow rate for different densities

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Fig. 16

Relation of In(ΔPθ*),In(ρ0/ρ¯θ),In((μθ/μ0)(1/Reβ)+1), and Reβ at room temperature of #1, #2, and #3

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Fig. 17

Relation of In(ΔPθ*),In(ρ0/ρ¯θ),In(ηθ+1),In((μθ/μ0)(1/Reβ)+1), and Reβ of #1 in different heating power

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Fig. 18

Relation of In(ΔPθ*),In(ρ0/ρ¯θ),In(ηθ+1),In((μθ/μ0)(1/Reβ)+1), and Reβ of #2 in the same heating power

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Fig. 19

Relation of In(ΔPθ*),In(ρ0/ρ¯θ),In(ηθ+1),In((μθ/μ0)(1/Reβ)+1), and Reβ of #1, #2, and #3 in the same heating power

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