Plane turbulent buoyant jets. Part 1. Integral properties
Plane turbulent buoyant jets. Part 1. Integral properties
复制标题
平面湍流浮力射流。
DOI：
10.1017/s002211207700189x
复制
发表时间：
1977
影响因子：
3.7
通讯作者：
E. J. List
中科院分区：
文献类型：
--
作者：
N. E. Kotsovinos;E. J. List
Corrsin & Uberoi (1950) 和 Morton, Taylor & Turner (1956) 建议用于分析湍流射流的积分技术被重新检验，试图改进对夹带的描述。 Priestley & Ball (1955) 的假设，即夹带系数是射流理查森数的线性函数，被确定是合理的，并且两个凭经验确定的羽流参数足以描述浮力射流到羽流的转变。一系列实验的结果被用来验证基本思想，在这些实验中，在大量不同初始理查森数的平面湍流浮力射流中记录了时间平均速度和时间平均温度分布。此外，对一系列浮力射流中平均示踪剂通量的测量表明，羽流中多达 40% 的传输是通过湍流通量进行的。
An integral technique suggested for the analysis of turbulent jets by Corrsin & Uberoi (1950) and Morton, Taylor & Turner (1956) is re-examined in an attempt to improve the description of the entrainment. It is determined that the hypothesis of Priestley & Ball (1955), that the entrainment coefficient is a linear function of the jet Richardson number, is reasonable, and that two empirically determined plume parameters are sufficient to describe the transition of buoyant jets to plumes. The results of a series of experiments in which both time-averaged velocity and time-averaged temperature profiles were recorded in a substantial number of plane turbulent buoyant jets of varying initial Richardson numbers are used to verify the basic ideas. In addition, measurements of the mean tracer flux in a series of buoyant jets indicate that as much as 40% of the transport in plumes is by the turbulent flux.