摘要
在管道设计中 ,经常遇到局部阻力系数确定的问题。突然扩大局部阻力系数ξ1=1 - A1 / A2 2是通过理论确定的。通过对三种 A1 / A2 情况下的局部阻力系数的实验研究 ,结果发现ξ不但与两过流断面有关 ,而且还和流速有关。通过实验研究 ,确定了ξ1 与流速 v1 及A1 / A2 之间的关系 ,在设计中 ,只要根据设计流速 v1 与 A1 / A2 就可以采用相应的ξ1
During the design of pipe, the determination of local loss coefficient is often come across. The local loss coefficient at sudden expansion ξ\-1=1-A\-1A\-22 is determined by the theory. In the paper, the local loss coefficient at sudden expansion under the condition of three kinds of A\-1A\-2 is studied by experiment. In the end, the result shows that ξ\-1 is related not only to two flow cross sections, but also to the velocity. By the experiment studying, the relationship of ξ\-1, A\-1A\-2 and v\-1 is determined. In a word, the water-power calculation of pipe can be done by taking corresponding ξ\-1, according to the design velocity v\-1 and A\-1A\-2.
出处
《西北水资源与水工程》
2000年第1期13-16,共4页
Northwest Water Resources & Water Engineering
