Experimental Determination of Oscillatory Lift and Moment Distributions on Fully Submerged Flexible Hydrofoils

1963 ◽  
Vol 7 (04) ◽  
pp. 24-41
Author(s):  
Guido E. Ransleben ◽  
H. Norman Abramson
Keyword(s):  
Steady State ◽  
Wind Tunnel ◽  
Aspect Ratio ◽  
Experimental Determination ◽  
Theoretical Predictions ◽  
Wind Tunnel Data

Measured span wise distributions of steady state and oscillatory lift and moment on fully submerged cantilever hydrofoils are presented. The hydrofoils were of aspect ratio 5 rectangular platform, and were towed at speeds sufficiently low to avoid cavitation. The data are compared with theoretical predictions and wind-tunnel data previously obtained at higher values of reduced velocity.

Experimental Determination of Steady and Unsteady Loads on a Submerged Supercavitating Hydrofoil

1968 ◽  
Vol 12 (02) ◽  
pp. 89-104
Author(s):  
Guido E. Ransleben
Keyword(s):  
Steady State ◽  
Aspect Ratio ◽  
Rigid Body ◽  
Experimental Determination ◽  
Data Reduction ◽  
Noise Levels ◽  
Considerable Difficulty ◽  
High Noise ◽  
Body Rolling

Measured spanwise distributions of steady-state and oscillatory lift and moment on a fully submerged supercavitating hydrofoil are presented. The foil had a rectangular planform of aspect ratio 5, and was excited in rigid-body rolling and pitching modes for the oscillatory tests. Considerable difficulty was experienced in the data reduction because of high noise levels, but a significant amount of data was recovered. All tests were made at a single angle of attack of 1 2 deg.

An Experimental Determination of the Relationship between Lift and Aerodynamic Power in Calliphora Erythrocephala and Phormia Regina

1972 ◽  
Vol 56 (1) ◽  
pp. 31-36
Author(s):  
JAMES WOOD
Keyword(s):  
Steady State ◽  
Experimental Determination ◽  
Insect Flight ◽  
Phormia Regina ◽  
Calliphora Erythrocephala ◽  
The Relationship

Lift and aerodynamic power were calculated for Calliphora and Phormia using assumptions which maximized and minimized the ratio of aerodynamic power to lift. The ratios of aerodynamic power to lift calculated by these methods, which do not rely on the assumption that steady-state aerodynamics applies to insect flight, are in agreement with results calculated by others using steady-state aerodynamics.

Determination of the Deformed Structural Shape of HIADs from Photogrammetric Wind Tunnel Data

2013 ◽  
Author(s):  
Cole D. Kazemba ◽  
Kevin Tran ◽  
Bill Quach ◽  
Laura K. Kushner ◽  
Alan Cassell ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Structural Shape ◽  
Wind Tunnel Data

The experimental determination of trajectories in geometrically similar plastic flows

1978 ◽  
Vol 13 (1) ◽  
pp. 29-34 ◽  
Author(s):  
R N Roth
Keyword(s):  
Steady State ◽  
Experimental Determination ◽  
Experimental Method ◽  
Quasi Steady State ◽  
Experimental Accuracy ◽  
Geometric Similarity ◽  
Orthogonal Grid ◽  
Wedge Indentation ◽  
Strain Wedge

A new experimental method is presented for determining trajectories of flow for non-steady-state processes which exhibit geometric similarity (quasi-steady-state processes (1)∗). One process that is normally regarded as quasi-steady-state (plane strain wedge indentation) is investigated using this method. It is shown that this process satisfies the requirements of geometric similarity within experimental accuracy. Results are presented for wedge angles of 30°, 60° and 90° and a range of indentation depths up to approximately 3 mm. Finally, it is suggested how this method can be combined with well-known orthogonal-grid techniques to provide information for the calculation of effective strains throughout the deforming region.

Experimental determination of adhesion and slip areas in rolling contact

1970 ◽  
Vol 5 (3) ◽  
pp. 193-199 ◽  
Author(s):  
E Ollerton ◽  
R Pigott
Keyword(s):  
Steady State ◽  
Experimental Determination ◽  
Experimental Technique ◽  
Contact Area ◽  
Rapid Determination ◽  
Glass Plate ◽  
Rolling Contact ◽  
Ground Glass ◽  
Steady State Rolling

An experimental technique has been developed to allow the rapid determination of adhesion and slip areas in steady-state rolling contact. The technique consists in rolling solid black-rubber toroids on a ground-glass plate under carefully controlled conditions. It enables the division of the contact area into slip and adhesion areas to be observed and photographed whilst rolling is taking place. A loading frame was devised to enable rolling with longitudinal shearing traction, rolling with transverse creep, and rolling with spin to be investigated either separately or in combinations. The results of the experiments have been compared with existing theories, and some conclusions as to the accuracy of the theories have been made.

scholarly journals Experimental determination of heat capacities and their correlation with theoretical predictions

2011 ◽  
Vol 79 (11) ◽  
pp. 1099-1103 ◽  
Author(s):  
Waqas Mahmood ◽  
Muhammad Sabieh Anwar ◽  
Wasif Zia
Keyword(s):  
Experimental Determination ◽  
Heat Capacities ◽  
Theoretical Predictions
Sign in / Sign up

Export Citation Format

Share Document