Some turbulent/non-turbulent properties of the outer intermittent region of a boundary layer
Some turbulent/non-turbulent properties of the outer intermittent region of a boundary layer
复制标题
边界层外部间歇区域的一些湍流/非湍流特性
DOI：
--
复制
发表时间：
1974
影响因子：
3.7
通讯作者：
J. Keffer
中科院分区：
文献类型：
--
作者：
Thomas B. Hedleyt;J. Keffer
利用数字采样和处理技术，对平板湍流边界层外部区域的间歇性进行了详细的研究。条件平均值用于生成流体的湍流区和非湍流区的平均值和波动分量。更具体地说，参考湍流/非湍流界面的瞬时位置，对这些变量进行点平均，以显示通过湍流锋面的各种量的分布。结果表明，湍流爆发的前缘和尾缘存在着明显的差异，从而对平均大涡的运动有了更完整的认识。
A detailed study of the intermittency in the outer region of a flat-plate turbulent boundary layer has been carried out using digital sampling and processing techniques. Conditional averages are used to generate mean and fluctuating components for the turbulent and non-turbulent zones of fluid. More particularly, point averages of these variables, taken with reference to the instantaneous position of the turbulent/non-turbulent interface, have been made to show the distribution of various quantities through the turbulent front. The results indicate that significant differences exist at leading and trailing edges of the turbulent bursts and a more complete picture of the motion of an average large eddy is deduced.