[关键词]
[摘要]
旋流环形堰竖井泄洪洞是一种新型的环境友好的内消能工, 跟传统环形堰竖井泄洪洞相比, 泄洪洞的流态和 消能防蚀机理明显不同。作为一种新型布置形式, 其复杂的水流特性并不是十分清楚。依托于广东清远抽水蓄能 电站下水库泄洪洞工程, 基于RNG k2E双方程湍流数学模型, 并结合VOF( Volume Of Fluid) 方法, 对下库旋流环形 堰竖井泄洪洞进水口、竖井旋流泄洪洞、出口的复杂水流进行了三维数值模拟, 并对部分水力参数的特性进行了解 析计算, 获得了流态、压力、流速、空化数等水力要素的变化规律。模拟结果表明, 数值计算结果与物理模型试验成 果吻合较好。并通过数值模拟验证了该新型内消能工的泄流能力和高消能效率。
[Key word]
[Abstract]
The mor ning g lor y shaft spillw ay w ith sw ir ling flow is a new kind of env iro nmentally fr iendly inner energ y dissipa2 tion. Compared w ith the t raditio nal morning g lo ry shaft spillwa y, mo rning g lo ry shaft spillway with sw irling flow has obviously differ ent f low pattern, co rro sion mechanism, and ener gy dissipation. As a new type of mo rning g lo ry shaft spillw ay, its complex flow characterist ics a re no t illustrated clear ly . In this paper, the shaft spillway of Qing yuan pumped st orag e pow er stat ion w as select ed as the study object. Based o n t he RNG k2E tw o2equatio n mo del for turbulent flow and VOF method, thr ee2dimensional tur bulent flow in the inlet and o utlet of mo rning g lo ry shaft spillway w ith swirling flow w as simulated. Analytical calculations wer e perfo rmed to character ize some hy dr aulic parameter s. T he var iatio n law o f flow pattern, pr essure, v elocit y, and cav itatio n number was obtained. The calculated results w ere in g ood ag r eement w ith the observ ed data. The dischar ge ca pacity and hig h ef2 ficiency of ener gy dissipation wer e verified by the numerical simulatio n.
[中图分类号]
[基金项目]
国家重点基础研究发展规划/ 9730 项目( 2013CB036405) ; 中国水利水电科学研究院专项基金( 水集1313)