Experimental Mating of Trapped Vortex Diffusers with Large Area Ratio Thrust Augmentors

1974 ◽  
Author(s):  
Charles H. Haight ◽  
Robert M. O'Donnell
Keyword(s):  
Area Ratio ◽  
Large Area ◽  
Trapped Vortex ◽  
Experimental Mating

Simulations of High Altitude Tests for Large Area Ratio Rocket Motors

AIAA Journal ◽  
2013 ◽  
Vol 51 (2) ◽  
pp. 433-443 ◽  
Author(s):  
R. Manikanda Kumaran ◽  
T. Sundararajan ◽  
D. Raja Manohar
Keyword(s):  
High Altitude ◽  
Area Ratio ◽  
Large Area ◽  
Rocket Motors

Flow Characteristics in a Large Area Ratio Curved Diffuser

1996 ◽  
Vol 210 (1) ◽  
pp. 65-75 ◽  
Author(s):  
B Majumdar ◽  
S N Singh ◽  
D P Agrawal
Keyword(s):  
Turbulence Intensity ◽  
Marked Improvement ◽  
Static Pressure ◽  
Flow Characteristics ◽  
Flow Distribution ◽  
Area Ratio ◽  
Large Area ◽  
Recovery Coefficient ◽  
Convex Wall ◽  
Pressure Recovery Coefficient

Flow characteristics in a large area ratio curved diffuser (AR = 3.4, Δβ = 90°, AS = 0.685) have been experimentally evaluated with splitter vanes installed at different angles to the flow at the inlet of the diffuser. The splitter vanes deflect the flow towards the convex wall and simultaneously increase the turbulence intensity. A marked improvement in flow distribution inside the diffuser and a significant increase in the static pressure recovery coefficient are obtained with splitter vanes at a 10° angle.

Sound Produced by Large Area-Ratio Nozzles During Fixed and Transient Operations

AIAA Journal ◽  
2014 ◽  
Vol 52 (7) ◽  
pp. 1474-1485 ◽  
Author(s):  
Brian W. Donald ◽  
Woutijn J. Baars ◽  
Charles E. Tinney ◽  
Joseph H. Ruf
Keyword(s):  
Area Ratio ◽  
Large Area ◽  
Transient Operations

Effect of Aeroelasticity on Vibroacoustic Loads during Startup of Large Area Ratio Nozzles

2017 ◽  
Author(s):  
Charles E. Tinney ◽  
Kenneth Scott ◽  
Mandi Routon ◽  
Jayant Sirohi ◽  
Joseph Ruf
Keyword(s):  
Area Ratio ◽  
Large Area

scholarly journals The Effect of OPV Module Size on Stability and Diurnal Performance: Outdoor Tests and Application of a Computer Model

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6324
Author(s):  
Tudur Wyn David ◽  
Noel Bristow ◽  
Vasil Stoichkov ◽  
Han Huang ◽  
Grazia Todeschini ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Computer Model ◽  
Series Resistance ◽  
Area Ratio ◽  
Water Infiltration ◽  
Great Promise ◽  
Model Parameters ◽  
Computer Simulation Model ◽  
Large Area ◽  
Module Size

The outdoor performance of large area Organic Photovoltaics (OPVs) is investigated in this work. Initially, the diurnal performance of the three modules is determined and found to be similar. Subsequently module degradation is monitored, and it is found that the larger area module displays a significantly greater stability as compared to the smallest area module; in fact the larger module displays a T50% (time to fall to 50% of its original value) of 191 days whilst the smallest module displays a T50% of 57 days. This is attributed to an increased level of water infiltration due to a larger perimeter-to-area ratio. These findings are then used to verify a computer simulation model which allows the model parameters, series and shunt resistances, to be calculated. It is determined that the series resistance is not an obvious obstruction at these module sizes. The findings of this work provide great promise for the application of OPV technology on a larger scale.

Near-field/far-field study of the end-effects regime produced by large area ratio nozzles

2013 ◽  
Vol 134 (5) ◽  
pp. 4057-4057
Author(s):  
Raymundo M. Rojo ◽  
Charles E. Tinney ◽  
Woutijn J. Baars ◽  
Joseph H. Ruf
Keyword(s):  
Field Study ◽  
Near Field ◽  
Area Ratio ◽  
Far Field ◽  
Large Area ◽  
End Effects
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