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Method and device for measuring viscous resistance coefficient and inertial resistance coefficient of porous medium

A technology of viscous resistance coefficient and inertial resistance coefficient, which is applied in the direction of measuring device, fluid dynamics test, machine/structural component test, etc., can solve the problems of low precision, complicated measurement method, large measurement error, etc., and achieve high precision, The effect of simple calculation method and compact device structure

Pending Publication Date: 2017-05-24
JILIN UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of complicated measurement methods and low precision of existing porous media viscous resistance coefficient and inertial resistance coefficient
[0004] Another object of the present invention is to overcome the large defect of existing measurement device measurement error

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  • Method and device for measuring viscous resistance coefficient and inertial resistance coefficient of porous medium
  • Method and device for measuring viscous resistance coefficient and inertial resistance coefficient of porous medium
  • Method and device for measuring viscous resistance coefficient and inertial resistance coefficient of porous medium

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0030] Such as figure 1 As shown, the present invention provides a device for measuring the viscous resistance coefficient and inertial resistance coefficient of porous media materials, which includes an air source generating device, an air source stabilizing device, a flow control device and a test pipeline connected in sequence. Wherein, the air source generating device adopts an air compressor 110 that compresses 360 liters per minute, which can continuously provide fluid for the entire measurement system.

[0031] The gas generated from the air compressor 110 is not stable, and the air pressure can be output stably through the gas source stabilizing device, which is convenient for the measurement of the subsequent gas flow rate. The air source stabilizing device adopts t...

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Abstract

The invention discloses a method and device for measuring the viscous resistance coefficient and the inertial resistance coefficient of a porous medium. The method comprises the following steps: 1, obtaining the pressure drop delta p of fluid before and after the fluid flows through the porous medium, and the flowing speed v of the fluid through the sensor; 2, carrying out the fitting of delta p and v in a quadratic polynomial: delta p=a<1>*v*v+a<2>*v, and obtaining the values of parameters a<1> and a<2>; 3, calculating the viscous resistance coefficient 1 / alpha and the inertial resistance coefficient C2, wherein the viscous resistance coefficient 1 / alpha and the inertial resistance coefficient C2 meets the formulas (shown in the description), delta n is the thickness of the material of the porous medium, mu is the dynamic viscosity of the fluid and Rho is the density of the fluid. The invention also provided a device for measuring the viscous resistance coefficient and the inertial resistance coefficient of the porous medium. The method can calculate the viscous resistance coefficient and the inertial resistance coefficient through measuring the flowing speed of the fluid and the pressure difference before and after the fluid flows through the porous medium, is simple, and is high in precision. The device for measuring the parameters is compact in structure, is low in cost, and is very convenient to use.

Description

technical field [0001] The invention belongs to the technical field of fluid fluid dynamics measurement, and in particular relates to a method and device for measuring viscous resistance coefficient and inertial resistance coefficient of porous media. Background technique [0002] Porous media is a substance composed of a skeleton composed of solid matter and a large number of densely clustered tiny voids separated by the skeleton. The tiny voids in porous media may be connected to each other, or partly connected and partly disconnected. Due to the structural characteristics of porous media, the research on the resistance characteristics of porous media is still very scarce. At present, there is no technology that can accurately measure the resistance coefficient and inertia coefficient of porous media, which brings a lot of inconvenience to the application of porous media. Most of the existing measuring devices are relatively simple and have large measurement errors, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 辛俐胡兴军惠政郭鹏马洪刚于旭涛吴宾张景银姚宏义王彬彬金铃丁九洋孙兴智
Owner JILIN UNIV
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