Scale 1:10 wave flume experiments on IIT oscillating water column wave energy device

The tests presented were performed for the Indian Institute of Technology
(IIT)in Madras in the large wave flume at the Technical University in Berlin.
Theyrepresent a small part of the research program undertaken at the IIT to
develop an OWC device well suited to the sea state parameters of the Indian
Ocean. A model of the prototype planned at the IIT was built in acrylic glass
on the scale of 1:10; flow visualization and other measurements were performed.
The behaviour inside the chamber does not change significantly when the orifice
diameter, the direction of wave approach or the water level is altered. An
excess pressure and a down-shift of the water level are noticed in all
measurements. Remarkable is the appearance of the second harmonic superimposed
on the chamber pressure fluctuation which is connected with wave periods
smaller than the design period of the OWC device. It could be shown that there
is some imponderability for the design of the device for short waves that are
not reproducible in scale 1:100.

This report can be found at:
"http://www.uni-leipzig.de/~grw/lit/texte_099/16__1993/16_1993_scale.htm"