scholarly journals Portable Wind Tunnels for Field Testing of Soils and Natural Surfaces

10.5772/54141 ◽  
2013 ◽  
Author(s):  
R. Scott Van Pelt ◽  
Ted M.
Keyword(s):  
Field Testing ◽  
Wind Tunnels

Field Testing of a Load Reducing Bushing Assembly for Valve Position Indicators

2007 ◽  
Author(s):  
Alton Reich ◽  
Steve Doherty ◽  
Michael Vogt ◽  
Keith Williams
Keyword(s):  
Flow Rate ◽  
Vibrational Energy ◽  
Angular Displacement ◽  
Field Testing ◽  
The United States ◽  
High Rate ◽  
Wind Tunnels ◽  
Operating Pressure ◽  
Monitoring And Control ◽  
Operating Environments

The Arnold Engineering Development Center (AEDC) testing complex includes more than 50 wind tunnels, test cells, arc heaters, and other specialized test facilities. Of these, 27 units have capabilities that are unmatched in the United States, and 14 are unmatched in the world. These unique facilities create equally unique operating environments for instrumentation used for monitoring and control of test conditions. Several high flow-rate, supersonic wind tunnels utilize off-the-shelf angular displacement transducers (ADTs) for monitoring the position of 90° valves (i.e. butterfly valves) used to control the air flow-rate, operating pressure, and temperature during testing. There are significant structural vibrations in the wind tunnels to which the ADTs are subject. These ADTs have experienced an unacceptably high rate of failure during testing. These failures increase maintenance costs, and in some cases can require test operations be suspended while the faulty ADT is replaced; leading to significant cost and schedule impacts associated with the down-time. This paper will discuss an effort to design a bushing assembly to reduce the loads experienced by the ADTs. The bushing assembly redirects vibrational energy from the valves into supporting structure, rather than into the ADT where it could cause bearing wear and ultimately failure. The paper will focus on the efforts to develop a meaningful field test arrangement for the bushing assemblies on one of the wind tunnels at AEDC, and an instrumentation package that monitored and recorded data relative to the performance of the bushing assembly during normal wind tunnel operations. Key results of this test program will be highlighted.

CFD Analysis of a Savonius Rotor in a Confined Test Section and in Open Field

2011 ◽  
Author(s):  
Marco Torresi ◽  
Bernardo Fortunato ◽  
Giuseppe Pascazio ◽  
Sergio Mario Camporeale
Keyword(s):  
Open Field ◽  
Test Section ◽  
Stokes Equations ◽  
Experimental Tests ◽  
Field Testing ◽  
Numerical Approach ◽  
Wind Tunnels ◽  
Savonius Rotor ◽  
Turbine Performance ◽  
Fundamental Information

Aim of this paper is to provide a deep insight into the dynamic behavior of the flow through a Savonius rotor by means of computational fluid dynamics (CFD). The analysis is carried out solving the incompressible Unsteady Reynolds Averaged Navier-Stokes equations, providing fundamental information concerning the complex unsteady flow field in and around the rotor. The motivation for employing a numerical approach relies on the consideration that detailed analysis of wind turbines, aiming to improve their design, cannot be easily performed by means of experimental full-scale field-testing due to the lack of control on the test conditions. At the same time, few are the wind tunnels where large turbine prototype testing is possible, so that experimental tests are usually carried out inside wind tunnels having dimensions comparable with those of the prototype. Moreover, if the available wind tunnel has a confined test section, the turbine performance could be quite different from those expected in open field. Therefore, in this paper, the turbine is firstly supposed to operate in open field and then in a bounded test section, in order to analyze the effect of flow confinement and to correlate the turbine performance in open field with experimental results obtained from prototypes tested in small wind tunnels of assigned blockage.

Field testing the AMIT Job Performance Aid: Methods, results, and implications for the Air Force maintenance community

2007 ◽  
Author(s):  
David E. Kancler ◽  
Christopher C. Curtis ◽  
Darryl S. Stimson ◽  
Johnnie Jernigan
Keyword(s):  
Job Performance ◽  
Air Force ◽  
Field Testing ◽  
Force Maintenance

Field Testing a Behavioral Measure of Excess Disability in Persons with Dementia

2013 ◽  
Author(s):  
Casey C. Catlin ◽  
Jane E. Fisher
Keyword(s):  
Field Testing ◽  
Behavioral Measure

Leadership Effectiveness Assessment Profile (LEAP): Officer Instrument Field Testing and Refinement

1992 ◽  
Author(s):  
Victor H. Appel ◽  
Carol Murray Quintana ◽  
Richard W. Cole ◽  
Mark D. Shermis ◽  
Paul D. Grubb ◽  
...  
Keyword(s):  
Leadership Effectiveness ◽  
Field Testing ◽  
Effectiveness Assessment

Sexuality-related conditions: A multistakeholder approach to explore feasibility of field-testing ICD-11 revisions in developing countries.

2016 ◽  
Vol 5 (3) ◽  
pp. 184-191 ◽  
Author(s):  
Megan M. Campbell ◽  
Rebeca Robles ◽  
Denise L. Vieira ◽  
Brigitte Khoury ◽  
Saria Daouk ◽  
...  
Keyword(s):  
Developing Countries ◽  
Field Testing

Speed control of large wind tunnels

1958 ◽  
Vol 4 (39) ◽  
pp. 146-147
Author(s):  
L.S. Drake ◽  
J.A. Fox ◽  
G.H.A. Gunnell
Keyword(s):  
Speed Control ◽  
Wind Tunnels ◽  
Large Wind

114. Field Testing Hearing Protector Performance

2004 ◽  
Author(s):  
N. Barone
Keyword(s):  
Field Testing ◽  
Hearing Protector

Optimizing, validating, and field testing a multiplex qPCR for the detection of amphibian pathogens

2018 ◽  
Vol 129 (1) ◽  
pp. 1-13 ◽  
Author(s):  
I Standish ◽  
E Leis ◽  
N Schmitz ◽  
J Credico ◽  
S Erickson ◽  
...  
Keyword(s):  
Field Testing ◽  
Multiplex Qpcr ◽  
Amphibian Pathogens
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