关键词: 数值模拟, 上游导墙, 墩头体型, 水力学指标, 绕流, 流场

Abstract: The upstream guide wall of flood discharge gate plays the role of restricting and guiding flow, improving the inlet boundary conditions, adjusting the flow pattern, and ensuring the safe operation of hydraulic structures. This paper, taking a proposed hydropower station on Dadu river as the research object, presents the numerical simulation used to study pier head of three shapes: respectively circular, streamlined, and square. The research results show that the backwater effect of the streamlined pier head is better than that of the circular pier head and the square pier head. The length of the detour flow zone around the streamlined pier head is 33.5%smaller than the circular pier head and is 62.3% smaller than the square pier head. The root mean square of the diversion ratio of the streamlined pier head is smaller than that of the square and circular pier heads, and the discharge capacity of the gate hole is more uniform. The relevant research results can provide guide for sluice design.

Key words: numerical simulation, upstream guide wall, pier head shape, hydraulic indicators, detour flow, flow field