摘要
用三维激光多普勒测速仪ＬＤＶ（ＬａｓｅｒＤｏｐｐｌｅｒＶｅｌｏｃｉｍｅｔｒｙ）对高分子添加剂淹没射流的湍流特性进行了测量。射流由直径为６ｍｍ的锥形喷嘴射出，流量为０．６９１７Ｌ／ｓ，添加剂为聚丙烯酰胺，其相对分子质量为４．２×１０６．研究了射流轴线和断面上脉动速度和湍流度的分布，以及沿射流轴线雷诺应力和方向关联系数的变化。为了探讨射流的统计特性，对偏态系数和平坦系数也进行了测量。高分子添加剂的加入。
The measurements of the turbulent submerged jets were made
by using a 3 dimensional Laser Doppler Velocimetry(LDV). The jets issue from a conical nozzle
6 mm in diameter. The flow rate is 0.691 7 L/s. The additive is Polyacrylamide(PAM) with a
molecular weight of 4.2×10 6. The distribution of the fluctuating velocity and turbulence
intensity on the jet axis and cross section,and the variations of the Reynolds stress and
correlation coefficient on the jet axis were analyzed. In addition, skewness coefficient and
flatness coefficient were also measured. The additive has some effects on turbulent
characteristics.
出处
《石油大学学报（自然科学版）》
EI
CSCD
1999年第2期40-43,46,共5页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
山东省自然科学基金
关键词
射流
湍流
高分子添加剂
钻井理论
流场
jet
turbulent characteristics
high polymer additive
measurement
