Three2dimensional numerical simulation of morning glory shaft spillway with swirling flow
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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.
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