A simulation analysis of factors influencing the flow field of the abrasive supercritical CO<sub>2</sub> jet

He Zhen-guo; Li Gen-sheng; Wang Hai-zhu; Shen Zhong-hou; Tian Shou-ceng

doi:10.11883/1001-1455(2015)05-0659-09

Volume 35 Issue 5

Nov. 2015

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He Zhen-guo, Li Gen-sheng, Wang Hai-zhu, Shen Zhong-hou, Tian Shou-ceng. A simulation analysis of factors influencing the flow field of the abrasive supercritical CO2 jet[J]. Explosion And Shock Waves, 2015, 35(5): 659-667. doi: 10.11883/1001-1455(2015)05-0659-09

Citation:

He Zhen-guo, Li Gen-sheng, Wang Hai-zhu, Shen Zhong-hou, Tian Shou-ceng. A simulation analysis of factors influencing the flow field of the abrasive supercritical CO₂ jet[J]. Explosion And Shock Waves, 2015, 35(5): 659-667. doi: 10.11883/1001-1455(2015)05-0659-09

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A simulation analysis of factors influencing the flow field of the abrasive supercritical CO₂ jet

doi: 10.11883/1001-1455(2015)05-0659-09

State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

Received Date: 2014-02-19
Rev Recd Date: 2014-07-14
Publish Date: 2015-10-10

Abstract

Abstract

To confirm and reveal the characteristics of the flow field of the abrasive supercritical CO₂ jet, the structure of the jet and the influence of the ambient factors were analyzed through numerical simulation, with the computational fluid dynamics software. Results show that the axial velocities of the fluid and particles on the wall firstly increase and then descend as the standoff distance increases, as well as the impact pressure of the fluid, which means that there is an optimal standoff distance where their peak values exist respectively and it is 3-6 times of the jet nozzle diameter at the differential pressure of 10-30 MPa; given fixed jet differential pressure, increase of the confining pressure from 10 MPa to 30 MPa has a weak negative effect on the axial velocity of the jet fluid. The supercritical CO₂ jet-breaking-rock experiment was conducted to provide test to the results of the numerical simulation. The velocities of the fluid and particles increase as the temperature goes up from 333 K to 413 K, while the impact pressure of the supercritical CO₂ fluid becomes weaker because of fluid density decrease as the volume fraction of the abrasive particles is set from 3.0% to 11.0% in a row, the velocity of each phase gradually decreases and the variation gradually gets smaller.
- fliud mechanics,
- supercritical CO₂,
- computational fluid dynamics software,
- abrasive jet,
- axial velocity

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References(29)

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