Particle following performance in supercritical CO2 swirling jet
Supercritical CO2(short as SC-CO2),used as a drilling and completion fluid in oil and gas industry,can contribute to alleviating water consumption,promoting energy conservation and emission reduction,and improving atmospheric environmental quality.It also facilitates CO2 utilization and storage,supporting China's dual carbon goals.SC-CO2 swirling abrasive jet technology,which combines the unique properties of SC-CO2 fluid with the advantages of swirling abrasive jets,shows promise for efficient rock breaking.To explore the particle following characteristics of SC-CO2 swirling abrasive jets,this study established a SC-CO2 swirling abrasive jets numerical model.The discrete phase model(DPM)was employed to track the trajectory of abrasive particles in the flow fields of swirling and conical jets.A particle erosion model was used to quantitatively characterize the erosion intensity of the abrasive particles.The study also compared and analyzed the effects of abrasive particle size,type,and mass flow rate on the flow field and erosion intensity of the swirling jet.The results indicated that SC-CO2 swirling abrasive jets outperformed abrasive water jets in terms of jet velocity,impact pressure,and abrasive erosion rate.Compared to conical jets,swirling abrasive jets could significantly expand the erosion area and enhance the erosion scope.The optimization of abrasive parameters needed to balance the erosion rate and erosion range of supercritical CO2 swirling abrasive jets..Increasing the size and density of the abrasive particles could enhance the erosion degree of the SC-CO2 swirling abrasive jets.However,due to the limited rock-carrying capacity of SC-CO2,the erosion range of the jet decreases.Increasing the mass flow rate of the abrasive resulted in a decrease in fluid and particle velocity,but the higher frequency of particle impacts compensates for the loss in particle velocity,leading to an overall increase in both the erosion range and intensity.The results of this study are expected to provide a theoretical basis for further expanding the engineering applications of supercritical CO2 jet.
CCUSsupercritical CO2 jetswirling abrasive jetparticle following
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