基于雾化效果评价的超音速喷管性能研究

Research on supersonic nozzle performance based on atomization effect evaluation

为提高低压低产井排水采气中井筒携液效率和排采工艺质量,对新型喷管内部超音速流动和雾化进行数值模拟和正交雾化实验,分析气相流量、液相流量、液相喷孔直径对雾化效果的影响。结果表明:气相流量为3 000~4 500 m^(3)/d时,随着流量的增加,雾化效果增强;液相流量为0.6~1.8 m^(3)/d、液相喷孔直径为6.0~7.8 mm时,随着流量与直径的增加,雾化效果减弱。雾化实验极差和相关系数分析结果表明:影响雾化效果的主次顺序为气相流量、液相流量、液相喷孔直径,对雾滴粒径影响的相关系数分别为-0.91、0.30、0.17。

In order to improve the efficiency of the wellbore liquid carrying efficiency and the quality of the drainage process in the drainage and gas recovery of low-pressure and low-yield wells, numerical simulation and orthogonal atomization experiments were carried out on the supersonic flow and atomization inside the new nozzle. The influences of gas flow rate, liquid flow rate, and liquid nozzle diameter on the atomization effect were analyzed. The results show when the gas flow rate is in the range of 3 000-4 500 m^(3)/d, as the flow rate increases, the atomization effect is enhanced. When the liquid flow rate is 0.6-1.8 m^(3)/d and the liquid nozzle diameter is in the range of 6.0-7.8 mm, as the flow rate and diameter increase, the atomization effect decreases. Atomization experiment range and correlation coefficient analysis show that the primary and secondary order of affecting the atomization effect is gas flow rate, liquid flow rate, and liquid nozzle diameter. The correlation coefficients on the atomized droplet size are-0.91, 0.30, and 0.17, respectively.