Deflector for dissolution of oxygen in a draft tube of a hydraulic turbine

摘要

A deflector for use in a hydraulic turbine is adapted to be mounted relative to a vertically extending wall (44) of the draft tube. The deflector (46) has an upstream plate (138) and a downstream plate (140). The upstream plate (138) is positioned to extend downwardly and outwardly from the wall (44) of the draft tube and the downstream plate (140) is positioned to extend downwardly and inwardly from the upstream plate (138). The downstream plate (140) has at least one elongated air communication port (170) extending therethrough and adjacent the upstream plate (138). An air supply inlet portion (200) extends from the wall (44) of the draft tube into the deflector (46) above the elongated air communication port (170) permitting an oxygen containing gas to flow from the air supply inlet portion (200) downwardly through the deflector (46), out the elongated air communication port (170) and into the water flowing past the downstream plate (140) so as to enhance the dissolved oxygen content of the water.