摘要
在标准K-ε模式模拟孔板式泄洪洞水流方面,发现在收缩比小(收缩程度大)时,用其计算出的流速场和实测的数值相差较大。为探讨这一问题,本文用二维LDA流速测量仪对孔板式泄洪洞内紊流特性进行了测量,接着在不同的网格系统下,应用标准的K-ε模型,对洞内水流进行了数值分析,探讨了网格对计算结果的影响。在此基础上,又进而对其内水流进行了多尺度紊流模型的数值模拟,在回流区得到了和实测结果较为吻合的结果。
When the standard K-e turbulence model is used to analyse orifice tunnel flow with a radius ratio R1/R2 =0.65. the computed velocity differs very much from the observed data. To study this phenomenon, a 2-D LDA velocity anemometer is used to measure the turbulence characteristics of the tunnel flow, accordingly, numerical analysis is done with the standard K-e model under two different staggered grid system. In the end, numerical results are obtained with a multiple time scale turbulence model.
出处
《水力发电学报》
EI
CSCD
北大核心
1993年第2期27-36,共10页
Journal of Hydroelectric Engineering
基金
国家自然科学基金的资助
