CFD-based parameter optimization for self-propelled nozzle

In order to effectively penetrate borehole pollution belt and expand the drainage area, certain work was done to increase the oil recovery and ultimately realize the purpose of production and injection increasing. By building a three-dimensional model of the nozzle, with the help of simulation software Fluent, flow field characteristics of self-propelled nozzle was studied under the conditions of different nozzle diameter and different angle between fore and post nozzles. The trend of the recoil power, rock breaking power and propulsion power were calculated by combining flow field velocity distribution law with the relevant formula. The results show that with the increasing of post nozzle diameter and fore nozzle angle, the recoil power and propulsion power increase, and rock breaking power decreases; on the other hand, with the rising of fore nozzle diameter and post nozzle angle, the recoil power and rock breaking power decrease, and propulsion power increases. The matching program of nozzle obtained by above numerical simulation provides a reliable basis for the actual production.