摘要
射流元件作为液动射流式冲击器的核心部件对冲击器的性能起着决定性作用,由于其内部流道结构复杂,压力和速度波动非常大,流动状态及其复杂,一直是冲击器研究的难点,近年来随着计算流体动力学(CFD)技术的发展,已有学者利用CFD技术对射流元件内部流场的压力、速度进行模拟分析,但如何对射流元件内部流场进行测量,如何对CFD结果进行验证一直未能有效解决。文章首次加工了透光的射流元件,并将射流元件至于冲击器本体以外,利用粒子图象测速(PIV)技术完成了对射流元件内部流场的观测,将实验结果和CFD模拟计算结果进行了对比分析,误差在10%以内,充分证明PIV实验结果和CFD计算的可靠性,为射流元件内部流场的测量提供了一种新方法。
Fluidic element plays an important role to the Hydro-efflux hammer as a centre component.It is a difficult part for researching Hydro-efflux hammer because of its complicate interior flow mechanism,seriously undulatory pressure and velocity,complex flow condition.In recent years,with the development of calculating flow dynamics(CFD) technology,some scholars have done a simulation analysis on pressure and velocity of the fluidic element interior field flow.But there is no efficient way on how to measure the fluidic element interior field flow and verify the CFD result.The euphotic fluidic element was produced for the first time and used outside the Hydro-efflux hammer.The fluidic element interior field flow was observed by Particle Image Velocimetry(PIV) technology.Comparative analysis the experiment result and the CFD analog computation result,the error is less than 10% which fully proofed the reliability of the PIV experiment result and CFD calculation.A new way was provided for measuring fluidic element interior field flow.
出处
《钻采工艺》
CAS
北大核心
2009年第2期54-55,共2页
Drilling & Production Technology
基金
国家863课题“超深井钻井技术研究”下设的“高效破岩冲击器的研制及旋冲钻井工艺技术研究”(编号:2006AA06A109-3-2)专题的部分研究成果
关键词
液动射流式冲击器
粒子图象测速
射流元件
hydro-efflux hammer,particle image measuring velocity(PIV),fluidic element
