基于响应面法的低压气井液气引射器结构优化设计  

Optimization of the Liquid Gas Ejector in Low Pressure Gas Wells Based on Response Surface Method

作　　者：黄思[1] 胡宇雄 胡岩韬 官天日 傅浩 HUANG Si;HU Yuxiong;HU Yantao;GUAN Tianri;FU Hao(School of Mechanical&Automotive Engineering,South China University of Technology,Guangzhou Guangdong 510641,China;Guanfu Energy Technology Co.,Ltd.,Guangzhou Guangdong 510730,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510641 [2]广东管辅能源科技有限公司,广东广州510730

出　　处：《机床与液压》2024年第24期84-90,共7页Machine Tool & Hydraulics

摘　　要：通过对低压气井液气引射器内部的两相流动进行三维全流域数值模拟发现,液气混合主要发生在喷嘴至混合管的前半段位置,混合管尺寸和喷嘴位置影响液气混合的效果。为了提高液气引射器引射性能,基于数值模拟,以流量比为优化目标,以4个主要结构参数(混合管长径比、喉嘴距、喉嘴面积比及扩散管扩散角)为设计因素进行优化分析。单因素优化分析结果表明:优选方案将流量比提高了4.92%。基于此,设计Box-Benhnken试验,建立了设计因素与流量比的响应面模型,通过方差分析和响应面分析发现:影响流量比的显著因素为喉嘴距、喉嘴面积比以及扩散管扩散角,且各设计因素对流量比的影响存在交互作用,其中喉嘴面积比与喉嘴距的交互作用显著。通过响应面模型得到了最优方案,使流量比较原模型提高了8.49%,优化效果明显优于单因素优化结果。Through 3D numerical simulation of the two-phase flow in the liquid-gas ejector of low-pressure gas wells,it is found that the liquid-gas mixing mainly occurs in the position from the nozzle to the first half of the mixing throat,and the mixing throat size and the nozzle position affect the liquid-gas mixing effect.In order to improve the ejective performance of liquid-gas ejector,based on numerical simulation,the flow ratio of ejector was taken as the optimization objective,and four main structural parameters(the length-diameter ratio of mixing throat,throat-nozzle distance,the area ratio of throat-nozzle and the diffusion angle of diffusion tube)were taken as design factors for optimization analysis.The results of the single factor optimization analysis show that the flow ratio is increased by 4.92%.Based on this,Box-Benhnken experimental was designed,and the response surface model of design factors and flow ratio was established.Through variance analysis and response surface analysis,it is found that the significant factors affecting the flow ratio are throat-nozzle distance,the area ratio of throat-nozzle and the diffusion angle of diffusion tube,and there is interaction between the influence of each design factor on the flow ratio,among which the interaction between the area ratio of throat-nozzle and throat distance is significant.Through the response surface model,the optimal scheme is obtained,which improves the flow rate by 8.49%,and the optimization effect is obviously better than the single factor optimization result.

关 键 词：液气引射器 低压气井 数值模拟 结构优化 响应面法 

分 类 号：TH48[机械工程—机械制造及自动化]