scholarly journals Ares I Scale Model Acoustic Tests Instrumentation for Acoustic and Pressure Measurements

2011 ◽  
Vol 130 (4) ◽  
pp. 2542-2542
Author(s):  
Magda B. Vargas ◽  
Douglas D. Counter
Keyword(s):  
Scale Model ◽  
Pressure Measurements ◽  
Ares I

Overview of the Ares I scale model test program

2011 ◽  
Vol 130 (4) ◽  
pp. 2542-2542
Author(s):  
Douglas D. Counter ◽  
Janice Houstion
Keyword(s):  
Model Test ◽  
Scale Model ◽  
Test Program ◽  
Ares I

scholarly journals Ares I Scale Model Acoustic Test above deck water sound suppression results

2011 ◽  
Vol 130 (4) ◽  
pp. 2543-2543
Author(s):  
Douglas D. Counter ◽  
Janice Houston
Keyword(s):  
Scale Model ◽  
Ares I ◽  
Sound Suppression

scholarly journals Ares I scale model acoustic test lift-off acoustics

2011 ◽  
Vol 130 (4) ◽  
pp. 2542-2542
Author(s):  
Douglas D. Counter ◽  
Janice Houston
Keyword(s):  
Scale Model ◽  
Lift Off ◽  
Ares I

Effective Sealing of a Disk Cavity Using a Double-Toothed Rim Seal

1992 ◽  
Author(s):  
S. H. Bhavnani ◽  
V. I. Khilnani ◽  
L.-C. Tsai ◽  
J. M. Khodadadi ◽  
J. S. Goodling ◽  
...  
Keyword(s):  
Laser Sheet ◽  
Reynolds Numbers ◽  
Labyrinth Seal ◽  
Superior Performance ◽  
Scale Model ◽  
Pressure Measurements ◽  
Design Data ◽  
Outer Periphery ◽  
Turbo Expander ◽  
Cavity Configuration

The trend towards higher gas turbine inlet temperatures is a natural consequence of the pursuit of higher turbine operating efficiencies. More efficient disk cooling technology is therefore a prime need. The sealing characteristics of a advanced air-cooled turbo-expander disk cavity have been studied using laser sheet flow visualization and static pressure measurements. Experiments were performed on a simplified half-scale model of an actual low pressure turbo-expander first-stage disk cavity. The rotor-stator geometry tested was equipped with a double-toothed rim (DTR) seal at the outer periphery and a labyrinth seal (or shaft seal) at the inner periphery of the cavity. This is one of the first studies that incorporates the effects of shaft sealing flows. Experiments were conducted in the absence of an external flow stream for various labyrinth seal flow rates, and rotational Reynolds numbers up to 1.52 × 106. The results confirm the adequacy of previously estimated design data for this disk cavity configuration. Pressure measurements reveal that a pressure difference criterion based on the differential pressure across the teeth of the rim seal can be used to detect ingress of mainstream flow. The superior performance of the seal geometry studied was confirmed by a comparison against a single-toothed rim seal and a simple axial rim seal.

5% Ares I scale model acoustic test: Overpressure characterization and analysis

2011 ◽  
Vol 130 (4) ◽  
pp. 2543-2543 ◽  
Author(s):  
David Alvord ◽  
Matthew Casiano ◽  
David McDaniels
Keyword(s):  
Scale Model ◽  
Ares I

Slamming Impacts of Hydrodynamically–Supported Craft

2014 ◽  
Author(s):  
Christine M. Ikeda ◽  
Carolyn Q. Judge
Keyword(s):  
Temporal Resolution ◽  
Structural Damage ◽  
High Speed ◽  
Irregular Waves ◽  
Scale Model ◽  
High Temporal Resolution ◽  
Pressure Measurements ◽  
Calm Water ◽  
Point Pressure ◽  
Wave Slamming

High–speed planing boats are subject to repeated slamming impacts, which can cause structural damage and discomfort or injury to passengers. The goal of this research is to study the fundamental physics of the water-impact of high–speed planing hulls and to measure the slamming loads and resulting motions of the craft upon re–entry into the water after becoming partially airborne. A set of towed scale–model experiments was conducted in calm water, regular waves and irregular waves to capture a sequence of individual impact events. Pressure measurements were taken on the bottom of the hull using both point sensors (PCB Piezotronics) and a pressure mapping system (Tekscan). The pressure signals from the pressure pads (providing both spatial and temporal resolution) and the point–pressure measurements (high temporal resolution) will be presented for individual slam events, allowing a deterministic approach to investigating high–speed planing craft wave slamming.

scholarly journals Simulation of acoustics for Ares I scale model acoustic tests

2011 ◽  
Vol 130 (4) ◽  
pp. 2543-2543 ◽  
Author(s):  
Gabriel C. Putnam ◽  
Louise L. Strutzenburg
Keyword(s):  
Scale Model ◽  
Ares I
Sign in / Sign up

Export Citation Format

Share Document