CAJ | 학술논문

以川东北地区高压裂缝性气藏开发钻井现场普遍使用的楔形节流阀为例，分析开度与节流面积、节流压降、流体速度的关系，并依据伯努利方程建立节流压降与开度、流体密度、进口流量的数学模型，采用workbench流固耦合数值模拟方法，对所述条件下的节流阀内部流场和阀芯应力分布对比分析。结果表明，楔形节流阀节流能力随开度的增大迅速减小，随流体密度、进口流量的增大而增大，在一定开度下，由于阀腔内流体的高速流动，阀芯变径台阶面与轴销连接孔位置处出现应力集中，同时阀芯节流面附近有明显漩涡产生，引起阀芯振动，容易导致断裂失效；当开度较小时，节流效果显著，含固相颗粒的流体容易造成节流阀堵塞，且高速流体对阀座冲刷引起刺漏，该分析结果与现场节流阀失效情况十分吻合。
이천동북지구고압렬봉성기장개발찬정현장보편사용적설형절류벌위례，분석개도여절류면적、절류압강、류체속도적관계，병의거백노리방정건립절류압강여개도、류체밀도、진구류량적수학모형，채용workbench류고우합수치모의방법，대소술조건하적절류벌내부류장화벌심응력분포대비분석。결과표명，설형절류벌절류능력수개도적증대신속감소，수류체밀도、진구류량적증대이증대，재일정개도하，유우벌강내류체적고속류동，벌심변경태계면여축소련접공위치처출현응력집중，동시벌심절류면부근유명현선와산생，인기벌심진동，용역도치단렬실효；당개도교소시，절류효과현저，함고상과립적류체용역조성절류벌도새，차고속류체대벌좌충쇄인기자루，해분석결과여현장절류벌실효정황십분문합。
TakingausedinfieldoffracturedcontinentalhighpressuregasreservoirdevelopmentintheNortheasternSichuan wedge manual throttle valve as an example,investigated the relationship among throttle areas,pressure drop,velocity and throttle opening,and also established mathematical model which is concerned with throttle opening,fluid density,imported flow and pres-sure drop based on bernoulli’s equation.The distribution of the flow field inside the throttle valve and the spool stress distribution under different conditions are compared and analyzed by using the workbench fluid-structure interaction numerical simulation method.The results suggest that the throttling ability decreases quickly with the increase of the degrees of opening in addition it decreases with the increase of fluid density and imported flow.The results suggest that in a certain degree of opening,because of the high speed flow of the valve cavity fluid,the connecting hole of value core stepped surface and pin occurs stress concentration, and the wedge guide surface appears obvious vortex generation which will cause the valve vibration leading to fracture failure;When the degrees of opening is small,the throttling valve works effectively and cause some problems frequently because of the high pressure impact effects of solid-phase fluid such as wedge faces assassination,block and so on.The results of the analysis are very consistent with the field value core failure situation.