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- Title
Structural Type Selection and CFD Study of Steel Bifurcation in Yaojiaping Water Conservancy Project.
- Authors
LIU Xian-cai; ZHANG Yu-meng; TANG Huai-xuan; HU Yue; WU He-gao
- Abstract
Combined with the general layout of Yaojiaping Hydraulic Project, this paper carries out three dimensional finite element stress analysis and flow field calculation respectively for the diversion system of the main power station with symmetrical Y shape and asymmetric Y shape crescent ribbed steel bifurcation. The calculation results show that the stress distribution at the two sides of symmetrical bifurcation is relatively uniform and the size of the rib is smaller. However, the stress concentration is greater near point A on the inner surface of the main branch taper intersecting line In terms of hydraulics, the head loss of two branches of asymmetric bifurcated pipe is not equal. The straight branch pipe with the main coaxial line has the smallest head loss, and the inclined branch pipe has the largest head loss, but not more than 0.358m of symmetrical bifurcation. It shows that the asymmetric bifurcation is slightly better than the symmetrical Y-shaped bifurcation in terms of head loss and flow pattern of the bifurcation. Considering the structural and hydraulic characteristics of bifurcation as well as the engineering topography, it is suggested that the asymmetric Y-shaped bifurcation layout should be chosen for the diversion system of the main power station in Yaojiaping Hydropower Project.
- Subjects
WATER conservation projects; COAXIAL cables; STEEL; STRESS concentration; FINITE element method; MECHANICAL stress analysis
- Publication
China Rural Water & Hydropower, 2024, Issue 1, p231
- ISSN
1007-2284
- Publication type
Article
- DOI
10.12396/znsd.230442