摘要
管路输沙试验中观察到管路底部出现滑动底床的现象。当滑动底床的运动速度趋于零时即为管道输送固体颗粒(不含粘性)的临界淤积点。本文对作用于滑动底床上的力进行了严格的理论分析,并在此基础上得出了管路输送固体颗粒临界淤积点处的流速与压降的确定方法。与实验结果相比较,发现由本方法确定的临界淤积点处的流速与压降与实测值吻合很好。
Sliding bed has been observed in our experiments of hydrotransport. It can be defined as the critical condition when the speed of the sliding beb approaches to zero and solid particles in it begin to deposit. Mechanism of such phenomenon has been thoroughly studied and the forces acting on the sliding bed have been theoretically analysed. Based on such analysis, a new method for determining the velocity and energy slope under the critical condition has been established. It is found that the measured values in experiments keep good agreement with the theoretical estimation.
出处
《水利学报》
EI
CSCD
北大核心
1989年第12期21-30,共10页
Journal of Hydraulic Engineering
