基于CFD的直板式节流阀压降特性研究  

Research on Pressure Drop Characteristics of Straight Plate Throttle Valve Based on CFD

作　　者：魏立明 李伟华 王兴义 吕晓乐 胡友文 吴鑫磊 陈华龙 鲁郑 WEI Liming;LI Weihua;WANG Xingyi;LYU Xiaoyue;HU Youwen;WU Xinlei;CHEN Hualong;LU Zheng(Pipe and Well Control Technology Service Branch of CNPC Bohai Drilling Engineering Co.,Ltd.,Tianjin 300280,China;International Division,Daqing Drilling Engineering Company,Daqing 163000,China;Yangtze University,Wuhan 430100,China)

机构地区：[1]中国石油集团渤海钻探工程有限公司管具与井控技术服务分公司,天津300280 [2]大庆钻探工程公司国际事业部,黑龙江大庆163000 [3]长江大学,湖北武汉430100

出　　处：《机械制造与自动化》2022年第4期85-88,共4页Machine Building & Automation

基　　金：中国石油集团重大专项(2019E-2605)。

摘　　要：节流阀是井控管汇的重要装置之一,在控压钻井系统中可用来控制流体介质流量及其井底压降变化。采用数值仿真模拟的方式,对于直板式节流阀阀芯进行数值模拟,得到不同阀孔的压降曲线、流场曲线、速度变化云图等。经过定量分析得到恒定流速下直板式节流阀的压降规律。数值模拟结果表明:在相同的开度下,随着平板式节流阀阀芯长轴长度的增加,管道截面的最大流速有下降的趋势;随着开度从20%增大到40%,压降的曲线趋于平缓。通过对不同形状直板阀压降特性的分析,得到压降线性程度较高的节流阀形状,其控压精度满足现场要求,可为后续控压钻井节流阀设计提供理论基础。Throttle valve,as one of the important devices of well control manifold,is used to control fluid medium flow and well pressure drop variation in pressure-controlled drilling system.The spool of straight plate throttle valve is simulated by numerical simulation to abtain the cloud charts of pressure drop curve,flow field curve and velocity change of different valve holes.The pressure drop law of straight plate throttle valve under constant flow velocity is revealed.The numerical simulation results show that the maximum velocity of pipeline section,at the same opening,decreases along with the increase of spool length,while the curve of pressure drop tends to be more gentle with the increase of the opening from^(2)0%to 40%.Analysis is conducted on the characteristics of the pressure drops in different straight plate valve shapes to gain the throttle valves with high pressure drop linearity,whose pressure control accuracy meets site requirement,and which provides theoretical basis for follow-up throttle valve design ing in pressure-controlled well drilling.

关 键 词：节流阀 速度云图 压降分析 

分 类 号：TH137.522[机械工程—机械制造及自动化]