Liquid CO2 phase-change jet flow impact force influence factor and change rule experiment method

A technology of influencing factors and changing rules, applied in the field of liquid CO2 phase change jet impact dynamic experiment, can solve problems in the initial stage, reduce experimental errors and promote development

Active Publication Date: 2020-12-25
NANHUA UNIV +1
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Problems solved by technology

At present, this technology has made great progress in field application and technical equipment, but for the liquid carbon dioxide phase change jet simulation experiment, it still needs to use dynamic and static load loading devices and coal rock samples, and for the carbon dioxide phase change jet proc

Method used

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  • Liquid CO2 phase-change jet flow impact force influence factor and change rule experiment method
  • Liquid CO2 phase-change jet flow impact force influence factor and change rule experiment method
  • Liquid CO2 phase-change jet flow impact force influence factor and change rule experiment method

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[0041]In the following, the present invention will be further explained through the embodiments and the accompanying drawings:

[0042]Such asfigure 1 As shown, the liquid carbon dioxide phase change jet experimental system used in the present invention is mainly composed of a carbon dioxide pressurization liquefaction system 100, a liquid carbon dioxide phase change jet and its monitoring system 200, and a remote control and data acquisition system 300.

[0043]The carbon dioxide pressurization and liquefaction system 100 is used for liquefying and pressurizing carbon dioxide to form high-pressure liquid carbon dioxide capable of undergoing phase change jets. Such asfigure 2 As shown, the carbon dioxide pressurized liquefaction system 100 preferably adopts a two-stage pressurized liquefaction system, which is mainly composed of an air compressor 1, a carbon dioxide cylinder 2, a carbon dioxide gas liquefaction pump 3, a low pressure carbon dioxide storage tank 4, a liquid carbon dioxide ...

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Abstract

The invention discloses a liquid CO2 phase-change jet flow impact force influence factor and change rule experiment method. The method comprises the following steps: S1, preparing a liquid CO2 phase-change jet flow experiment system; S2, formulating an experiment scheme; S3, preparing an experiment; S4, preparing high-pressure liquid carbon dioxide; S5, forming liquid CO2 jet flow, and testing jetflow form, speed and pressure data; and S6, adjusting the CO2 initial pressure, the distance from a jet flow nozzle to an impact stress sensor and the included angle parameter between the jet flow nozzle and the impact stress sensor, repeating the step 4 and 5 to obtain the time-varying parameter of the liquid CO2 phase-change jet flow impact force under different initial pressures, different distances and different included angles, and analyzing the relationship among the liquid CO2 phase-change jet flow impact force, the initial pressure, the distance, the included angle and the time parameter. The method can be used for researching the influence and change rule of different initial pressures, jet angles and jet distances on the carbon dioxide phase-change jet impact force, and promoting the development of technical basic theories and application technologies.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide phase change fracturing of coal and rock mass, and in particular relates to a liquid CO2 under different initial pressures and temperatures 2 Experimental method of phase change jet impingement dynamics. Background technique [0002] Liquid carbon dioxide phase change fracturing technology, as an effective coal-rock crushing technology, is widely used in rock mass crushing and low-permeability coal-rock reservoir fracturing and permeability enhancement. The principle of this technology is: pressurize and liquefy carbon dioxide and store it in a sealed container, adopt the form of instantaneous heating or instantaneous pressure relief, generate a high-pressure gas jet to act on the target coal and rock mass, and cause structural damage to the coal and rock mass under the action of high-pressure gas. At present, this technology has made great progress in field application and technical equip...

Claims

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Application Information

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IPC IPC(8): G01M10/00
CPCG01M10/00Y02P90/70
Inventor 白鑫张东明贺桂成王艳喻清张树文朱忠华
Owner NANHUA UNIV
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