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Hydraulic Cross-Flow TurbinesBy Alexander M. Gorlov, Professor Emeritus

October 26 28, 2005

Alexander M.

Gorlov:

1. Darrieus

Turbine2. Orthogonal

Turbine

3. Helical

Turbine

Alexander M.Gorlov:

1. DarrieusTurbine

2. OrthogonalTurbine

3. HelicalTurbine


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Double Helix GHT


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Triple Helix GHT


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Various Configurations


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Hexagon Helical


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2.2 m Triple Helix Steel


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Darrieus Classic


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Helical VS Orthogonal


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Low Head In Dam Use

Wh H d ?


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Why Hydra?


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24 meters orthogonal


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Forces


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Various Rotors


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Demo Projects. Cape Cod, 1996


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Uldolmok, Korea


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Korea, 2002. 1m Triple Helix


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Korea, 2004. New Cage for 3m GHT


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Maine 2001

M i 2003


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Maine 2003

Amazon


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Amazon

A 2002


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Amazon 2002Amazon Tide-Energy Project

Field Site Installations - Com bu Island

August 2002

Views of the pulley, belt drive, alterator, monitoring equipment, rheostat, and batteries.

Amazon GHT


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Amazon GHT

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Figure 1 - Rural artisans with a 6-blade helical turbineA significant improvement: the helical turbine. The technology we have developed usesjetties to force the flow of tidewater through a duct and run a helical-blade turbine.(See Figure 1.) This innovative turbine is more efficient in free flow than conventional,straight-blade versions and, when operating in a duct, can attain an efficiency of about 70%.

Amazon Electric Station


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Amazon Electric Station

Figure 2. Field Research Station: managing tidal flow with jetties, a duct, and a gate

Location. Above is a view of our field station on Combu Island near the mouth of theAmazon. It is located in a rural community about one half-hour by boat from Belem, thelar est cit in the re ion.

Korea, Project 1


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Korea, Project 1

Korea, Project 2


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Korea, Project 2

L I 2004


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L.I. 2004


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L.I.-1

L.I.-2


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Amesbury test


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Amesbury test

Ocean Power Farm


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Fig. 1. Air bubbles created by a Single-Blade GHT in the Tow Tank at Woods Hole

Oceanographic Institute (WHOI), July 2005. Current flows left to right. Turbine sits just underthe water surface, rotating clockwise. Blade inclined towards the direction of rotation (worst

case). Water velocity 1 m/s.

Vortex and

Aeration effect

05 crossflow turbine

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