明渠弯道边界层的Markov特性研究  

Study on Markov Properties of Boundary Layer in Open Channel Bend

作　　者：万涛[1] 白玉川[1] 

机构地区：[1]天津大学河流海岸工程泥沙研究所,天津300072

出　　处：《水利与建筑工程学报》2011年第5期1-4,30,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金资助项目(50979066;40776045)

摘　　要：针对明渠弯道湍流边界层,利用一阶Markov过程并结合象限分析法,计算了转化模式的转化概率。结果指出各象限平均自转化概率为65.51%,76.98%,69.42%,76.97%,湍流猝发的喷射和清扫发生频率最高;自转化概率P22、P44沿河宽周期性向凸岸衰减,并在弯顶凹岸处达到最大值,其随着底部环流的增大有微弱减小,但总体分布于67%～90%。Pointing to the turbulent boundary layer of open channel bend,and by utilizing the first-order Markov process combined with quadrant analysis,the 16 transfer probabilities are calculated here,the result indicates that four averaged self-transfer probabilities are 65.51 percent,76.98 percent,69.42 percent and 76.97 percent respectively,and the numbers show that the frequencies of ejection and swap in the bursting process are largest;The self-transfer probabilities P22 and P44 decrease from the concave bank to convex bank periodically,and reach the maximum values in the concave bank of the vault,at the same time,with the increase of circulation flow strength,the probabilities have a weak decrease between 67 percent and 90 percent.

关 键 词：MARKOV过程 UV-象限法 转化概率 猝发 环流 

分 类 号：TV143[水利工程—水力学及河流动力学]