Fragmentation testing Experimental blast fragmentation research in model-scale bench blasts

2012 ◽  
pp. 67-76 ◽  
Keyword(s):  
Model Scale ◽  
Blast Fragmentation

Investment Model Scale

1998 ◽  
Author(s):  
Caryl E. Rusbult ◽  
John M. Martz ◽  
Christopher Agnew
Keyword(s):  
Investment Model ◽  
Model Scale

Investment Model Scale--Mayangna/Miskito Version

2018 ◽  
Author(s):  
Jeffrey Winking ◽  
Paul W. Eastwick ◽  
Leigh K. Smith ◽  
Jeremy Koster
Keyword(s):  
Investment Model ◽  
Model Scale

Auralization of Flyover Noise from Open Rotor Engines Using Model Scale Test Data

2014 ◽  
Author(s):  
Stephen A. Rizzi ◽  
David Stephens ◽  
Jeffrey J. Berton ◽  
Dale E. Van Zante ◽  
John Wojno ◽  
...  
Keyword(s):  
Test Data ◽  
Model Scale ◽  
Open Rotor ◽  
Scale Test

scholarly journals Physical Modelling of the Effect on the Wave Field of the WaveCat Wave Energy Converter

2021 ◽  
Vol 9 (3) ◽  
pp. 309
Author(s):  
James Allen ◽  
Gregorio Iglesias ◽  
Deborah Greaves ◽  
Jon Miles
Keyword(s):  
Wave Height ◽  
Wave Energy ◽  
Significant Wave Height ◽  
Wedge Angle ◽  
Wave Energy Converter ◽  
Wave Period ◽  
Surface Elevation ◽  
Energy Converter ◽  
Significant Wave ◽  
Model Scale

The WaveCat is a moored Wave Energy Converter design which uses wave overtopping discharge into a variable v-shaped hull, to generate electricity through low head turbines. Physical model tests of WaveCat WEC were carried out to determine the device reflection, transmission, absorption and capture coefficients based on selected wave conditions. The model scale was 1:30, with hulls of 3 m in length, 0.4 m in height and a freeboard of 0.2 m. Wave gauges monitored the surface elevation at discrete points around the experimental area, and level sensors and flowmeters recorded the amount of water captured and released by the model. Random waves of significant wave height between 0.03 m and 0.12 m and peak wave periods of 0.91 s to 2.37 s at model scale were tested. The wedge angle of the device was set to 60°. A reflection analysis was carried out using a revised three probe method and spectral analysis of the surface elevation to determine the incident, reflected and transmitted energy. The results show that the reflection coefficient is highest (0.79) at low significant wave height and low peak wave period, the transmission coefficient is highest (0.98) at low significant wave height and high peak wave period, and absorption coefficient is highest (0.78) when significant wave height is high and peak wave period is low. The model also shows the highest Capture Width Ratio (0.015) at wavelengths on the order of model length. The results have particular implications for wave energy conversion prediction potential using this design of device.

On The Hydrodynamics Of A Skiff At Different Crew Positions

2013 ◽  
Author(s):  
Ignazio Maria Viola ◽  
Joshua Enlander
Keyword(s):  
Uncertainty Analysis ◽  
High Performance ◽  
Olympic Games ◽  
Towing Tank ◽  
Lower Resistance ◽  
Model Scale ◽  
Sailing Boat ◽  
Large Vessels

A set of towing tank tests was undertaken on a 1:4-model-scale high-performance small sailing boat, which was a candidate for the 2016 Olympic games. The resistance, sink and trim were measured and uncertainty analysis was completed. The boat was tested for different longitudinal positions of the crew in displacement, transition and fully planning regimes. The resistance measurements in the towing tank were well correlated with established empirical formulations developed for planning hulls. It was found that at low Froude numbers, forward crew positions allow lower resistance and resistance increases significantly for after crew positions, while at higher Froude numbers after positions allow lower resistance, and the resistance is less sensible to the crew position. These findings are in agreement with sailor experience and with measurements performed by other authors on large vessels.

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