Numerical simulation of the abrasive supercritical carbon dioxide jet： The flow field and the influencing factors

• Published in: Journal of hydrodynamics. Series B Vol. 28; no. 2; pp. 238 - 246
• Main Author: 贺振国 李根生 王海柱 沈忠厚 田守增 陆沛青 郭斌
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.04.2016; Springer Singapore; State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China%PetroChina Tarim Company,Korla 841000,China
• Subjects: Abrasive cutting; Abrasive erosion; abrasive supercritical carbon dioxide jet; Computational fluid dynamics; Computer simulation; Constants; Cutting; Engineering; Engineering Fluid Dynamics; Fluid flow; Hydrology/Water Resources; impact factor; Mathematical models; Numerical and Computational Physics; numerical simulation; Simulation; velocity distribution; 射流流场; 影响因素; 数值模拟方法; 磨料射流; 磨料水射流; 计算流体力学; 超临界CO2; 超临界二氧化碳; impact factor; velocity distribution; abrasive supercritical carbon dioxide jet; numerical simulation
• ISSN: 1001-6058; 1878-0342
• DOI: 10.1016/S1001-6058(16)60625-X

The supercritical carbon dioxide （SC-CO2） jet can break rocks at higher penetration rates and lower threshold pressures than the water jet. The abrasive SC-CO2 jet, formed by adding solid particles into the SC-CO2 jet, is expected to achieve higher operation efficiency in eroding hard rocks and cutting metals. With the computational fluid dynamics numerical simulation method, the characteristics of the flow field of the abrasive SC-CO2 jet are analyzed, as well as the main influencing factors. Results show that the two-phase axial velocities of the abrasive SC-CO2 jet is much higher than those of the abrasive water jet, when the pressure difference across the jet nozzle is held constant at 20 MPa, the optimal standoff distance for the largest particle impact velocity is approximately 5 times of the jet nozzle diameter; the fluid temperature and the volume concentration of the abrasive particles have modest influences on the two-phase velocities, the ambient pressure has a negligible influence when the pressure difference is held constant. Therefore the abrasive SC-CO2 jet is expected to assure more effective erosion and cutting performance. This work can provide guidance for subsequent lab experiments and promote practical applications.