Hydraucone Draft Tube CFD
I own an old watermill in the east of France. I am in the process of installing a new 1.8m diameter Kaplan Hydro Turbine with a flow of 10 cubic metres per second.
Because of space constraints it would not be easy to install a conventional elbow Draft Tube.
I have come across a more compact form of Draft Tube known as White's Hydraucone Draft Tube.
This is a very simple design. The water exiting the turbine is deflected by a flat plate to the walls of the chamber. The water then exits the Draft Tube underneath the deflector plate to the exit canal, the velocity having been greatly reduced.
A Hydraucone Draft Tube was installed at Niagara Falls in the 1920's.
Does anyone in the forum know of design parameters for a White Hydraucone ? e.g. what is the optimal spacing to the deflector plate ?
Would it be possible for some kind person to run some simple CFD calculations on the effectiveness of a Hydraucone Draft Tube ?
Turbine diameter: 1.8m Water Flow: 10 m3/s Velocity 3.93 m/s (possibly with some rotation)
Water chamber 5m X 5m
The original paper on the Hydraucone Draft Tube can be found here:
This might make for an interesting student CFD project or perhaps a useful learning exercise for someone new to CFD.
Any assistance would be greatly appreciated.
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