CAJ | 학술논문

井下节流技术是一种新的采气技术,但是喷嘴会受到气流的冲刷腐蚀,影响节流嘴的使用寿命.根据流体流动的基本定律,建立了喷嘴冲刷腐蚀的数学模型,运用SIMPLE算法解方程.根据数值计算的结果发现喷嘴的入口处和后端剪切应力比较大,冲刷腐蚀比较严重.喷嘴壁受到的剪切应力随入口压力和流体粘度的变大而升高,研究的结果可以为节流器喷嘴的设计提供指导.
정하절류기술시일충신적채기기술,단시분취회수도기류적충쇄부식,영향절류취적사용수명.근거류체류동적기본정률,건립료분취충쇄부식적수학모형,운용SIMPLE산법해방정.근거수치계산적결과발현분취적입구처화후단전절응력비교대,충쇄부식비교엄중.분취벽수도적전절응력수입구압력화류체점도적변대이승고,연구적결과가이위절류기분취적설계제공지도.
Downhole choking technique is a new gas production technology, but nozzles are eroded by erosion-corrosion, which will affect service life of the choke. In this paper, according to the basic law of fluid flow, a mathematical model of nozzle erosion-corrosion was established. And SIMPLE algorithm was used to solve equations. The numerical calculation results show that the shear stress of nozzle at the entrance and the back-end is larger;the erosion-corrosion is more serious. The shear stress of nozzle increases with increasing of inlet pressure and viscosity. The study can provide guidance for the design of choke nozzle.