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Method for testing performance of micro-dimension labyrinth type unit flow passage waterpower

A technology of hydraulic performance and labyrinth flow channel, which is applied in the field of unit flow channel hydraulic performance testing, and can solve problems affecting fluid flow and other issues

Inactive Publication Date: 2009-08-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the previous approach ignores some basic issues in the micro-flow theory, such as the surface roughness of the flow channel will affect the fluid flow to a greater extent, etc.

Method used

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  • Method for testing performance of micro-dimension labyrinth type unit flow passage waterpower
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  • Method for testing performance of micro-dimension labyrinth type unit flow passage waterpower

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] see figure 1 , the present invention includes a high-pressure gas cylinder 1 and a closed water tank 3 connected with the high-pressure gas cylinder 1, a pressure reducing valve 2 is also arranged between the high-pressure gas cylinder 1 and the closed water tank 3, and the outlet of the closed water tank 3 is connected in series through pipelines There are interconnected spherical valve 4, filter 5, needle valve 6, glass rotameter 7 and labyrinth flow channel test piece 9, conical beaker 10 is set at the outlet of labyrinth flow channel test piece 9, conical beaker 10 It is placed on the precision electronic scale 11 connected to the computer 13 through the A / D conversion card, and the differential pressure transmitter connected to the computer 13 through the tee 8 and the A / D conversion card is also connected in parallel on the labyrinth flow channel...

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Abstract

A method for testing the hydraulic performance of a micro-scale labyrinth-type unit flow channel. Connect the test parts to be tested into the pipeline of the test device, and use a high-precision differential pressure transmitter to measure the pressure at the inlet and outlet after the water flow passes through the labyrinth flow channel. Difference ΔP, use two different test piece length measurement methods to determine the local loss ΔP loss of the inlet and outlet, and obtain the real pressure drop ΔP flow channel of the labyrinth flow channel; at the same time, use a precision electronic scale to measure the mass flow rate through the labyrinth flow channel per unit time M, which is converted into volume flow Q by the formula. The real-time data measured by the two instruments are input into the computer for display and storage through a high-precision A / D conversion card to ensure the simultaneity and accuracy of data collection.

Description

technical field [0001] The invention relates to a method for testing the hydraulic performance of a unit flow channel, in particular to a method for testing the hydraulic performance of a microscale labyrinth type unit flow channel. Background technique [0002] Microscale fluid mechanics is a research field between classical macroscopic fluid mechanics and microscopic mechanics, and mainly studies the laws of fluid flow with characteristic scales ranging from mm to μm. The labyrinth flow channel at the microscale is widely used because its boundary tortuousness can make the fluid turbulent, thereby reducing the sensitivity of the pressure to the flow rate. The structural characteristics of its flow channel have a great effect. The labyrinth emitter is a typical example. The size of the flow channel is mostly at the mm level. The flow channel of the emitter is generally composed of several units of the same shape (such as triangles and trapezoids). Different parameters are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
Inventor 赵万华张俊卢秉恒
Owner XI AN JIAOTONG UNIV