幂律液体螺旋流场中球形颗粒的最小不上升粒径  

DETERMINATION OF MINIMAL NON-RISING SPHERICAL PARTICLE SIZE IN THE HELICAL FLOW OF POWER-LAW FLUID IN CONCENTRIC ANNULI

作　　者：张景富 陈家琅 白新华 

出　　处：《大庆石油学院学报》1994年第4期43-47,共5页Journal of Daqing Petroleum Institute

摘　　要：根据球形颗粒在幂律液体同心环空螺旋流场中绕流状况及受力特点．给出了颗粒沉降速度公式，导出了计算绕流状态参数公式及状态转变的临界值，依据颗粒极限沉降条件，得出了各不同绕流状态下最小不上升粒径的计算公式，并进行了简要的数值模拟分析。Abstract The partickdrop velocity formulas are given based on the detour flow form andforce characteristlcs acted on the spherical particle in the field of helical flow of power-law fluid in concentric annuli. The calculation eouation of detour flow state Parameterand critical value of state changing are derived when the particle size is unknown. Ac-cording to particle drop velocity,minimal non-rising size calculation formulas at everydetour flow state are obtained,and brief numeriCal value simulation and analysis are ac-complised.SUBJECT TERMS:power-law fluid,helical flow,detour flow,particle Reynolds num-ber.steer down velocity, minimal non-rising size

关 键 词：幂律液体 螺旋流 颗粒 最小不上升粒径 洗井 

分 类 号：TE252.2[石油与天然气工程—油气井工程]