Baffles are often used to retrofit culverts to aid in fish passage. Theobjective of this experimental investigation was to compare the turbulent flowstructure inside a full-scale spiral corrugated culvert fitted with sloped- andslotted-weir baffles to available turbulence descriptions for non-baffled culverts.Velocity measurements were taken in a 1.83 m diameter, 12.2 m longcorrugated metal culvert fitted with sloped- and slotted-weir baffles using aSontek Micro-acoustic Doppler velocimeter for flow rates of 0.043, 0.085, 0.113,and 0.198 m~3/s and culvert slopes of 1.14, 3.00, and 4.33%. Results showed therewere only minor differences in the turbulent flow structure created by each baffletype. The most significant differences included higher lateral turbulent intensitieson the edges of the jet created by the slotted-weir baffles, and higher turbulentkinetic energies on the left side of the culvert (looking downstream) caused by thesloped-weir baffles. Downstream from a slotted-weir baffle, a reduced velocityand streamwise turbulent intensity zone was found near the left edge of the flowthat was similar to that found in the bare culvert. The sloped-weir bafflesproduced a less pronounced zone near the right edge of the flow.
展开▼
