The new CIRA Icing Wind Tunnel Spray Bar System development

2000 ◽  
Author(s):  
G. Leone ◽  
L. Vecchione ◽  
P. De Matteis ◽  
V. Szemskat ◽  
A. Reister
Keyword(s):  
Wind Tunnel ◽  
System Development

MEMS sensor system development at NASA Langley Research Center for wind tunnel applications

2002 ◽  
Author(s):  
R. Lawrence ◽  
S. Kahng ◽  
E. Adcock ◽  
H. Soto ◽  
W. Culliton ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
System Development ◽  
Sensor System ◽  
Research Center ◽  
Mems Sensor ◽  
Langley Research Center

Highlights of the Lockheed Martin F-35 STOVL jet effects programme

2009 ◽  
Vol 113 (1140) ◽  
pp. 119-127 ◽  
Author(s):  
R. Hoggarth ◽  
Richard Mange
Keyword(s):  
Wind Tunnel ◽  
System Development ◽  
Ground Effect ◽  
Wind Tunnels ◽  
Wind Tunnel Model ◽  
Low Speed ◽  
Test Conditions ◽  
Tunnel Model ◽  
Testing Techniques ◽  
Flight Regimes

Abstract This paper presents the highlights of the F-35 STOVL Jet Effects (SJE) test effort during the complete four years of the System Development and Demonstration phase. A new 12%-scale F-35 SJE model was tested in the German-Dutch wind-tunnels Large Low Speed Facility in order to gather STOVL jet-induced Forces and Moments. Ten separate test entries were conducted, covering all STOVL flight regimes from pure hover in ground effect through transition to wing borne flight. This paper will present an overview of this program, including a detailed description of the wind-tunnel model, testing techniques, test conditions, and accomplishments.

Application of Two-Component Pressure Sensitive Paint in Transonic Wind Tunnel

2011 ◽  
Vol 216 ◽  
pp. 181-187
Author(s):  
Yong Cun Zhang ◽  
Liu Sheng Chen ◽  
Jin Kui Shang ◽  
Xiao Guang Ma ◽  
Xue Yuan Chen ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
High Speed ◽  
System Development ◽  
Wind Tunnel Test ◽  
Pressure Sensitive Paint ◽  
Model Surface ◽  
Pressure Sensitive ◽  
Sensor Technique ◽  
Two Component ◽  
Optical Pressure

As a new optical pressure sensor technique, Pressure Sensitive Paint (PSP) is one of the important techn iques for model surface p ressure m easurement in wind tunnel test s . With the help of PSP , it is possible to do p ressure m easurement on compl icated or special model surface , which is usually difficult to be measured by pressure tap s . Since PSP technique being introduced into China from TsAGI (Russia) , AVIC ARI has investigated two-component PSP technique in high-speed wind tunnel in cooperati on with ICCAS China . T his report present s the principle of PSP technique, test control system development and the test result comparison s between PSP technique with two-component pressure sensitive paint FOP-2 and classic tap measurement on wing surface of an airplane model . T he results showed that the two-component pressure sensitive paint has better performance and can be used for model pressure measurement.

Dynamic Analysis and Control System Development for a Laboratory Wind Tunnel

2000 ◽  
Author(s):  
Dean H. Kim ◽  
Martin J. Morris ◽  
Greg M. Leja ◽  
Tyler R. Scarlata ◽  
Stephen R. Wylie
Keyword(s):  
Control System ◽  
Wind Tunnel ◽  
System Dynamics ◽  
Dynamic Analysis ◽  
Mechanical Engineering ◽  
System Development ◽  
Operating Conditions ◽  
Single Input Single Output ◽  
And Control ◽  
Tunnel System

Abstract This paper describes the dynamic modeling and control system development to maintain a constant air speed in the test section of a laboratory wind tunnel. The previous manual operation procedure of this wind tunnel during a typical test with multiple operating conditions had been tedious and awkward at best. The wind tunnel system dynamics have been accurately characterized using single-input, single output (SISO) experimental step responses for specified operating conditions. The implementation of the subsequent control system has improved performance such that this wind tunnel system now can be used like a commercial wind tunnel and both as a classroom instruction tool and as a research tool. This work has been performed by an undergraduate team for the two-semester capstone design course for the Mechanical Engineering Department at Bradley University. This project incorporates many aspects of a mechanical engineer’s education such as mechanical design, sensor selection, software mastery, dynamic analysis, and feedback control implementation. This project also crosses traditional mechanical engineering boundaries because of its connection to the fields of fluid dynamics, system dynamics, and control systems.

Cross-sectional TEM specimen preparation from magneto-optical disk by ultramicrotomy

1993 ◽  
Vol 51 ◽  
pp. 236-237
Author(s):  
F. Shaapur ◽  
M.J. Kim ◽  
Seh Kwang Lee ◽  
Soon Gwang Kim
Keyword(s):  
System Development ◽  
Thin Foil ◽  
Specimen Preparation ◽  
Material System ◽  
Cross Sectional ◽  
Protective Layers ◽  
New Material ◽  
Diamond Saw ◽  
Original Production ◽  
Thick Medium

TEM characterization and microanalysis of the recording media is crucial and complementary to new material system development as well as quality control applications. Due to the type of material generally used for supporting the medium, i.e., a polymer, conventional macro- and microthinning procedures for thin foil preparation are not applicable. Ultramicrotorny (UM) is a viable option and has been employed in previous similar studies. In this work UM has been used for preparation of XTEM samples from a magneto-optical (MO) recording medium in its original production format.The as-received material system consisted of a 4-layer, 2100 Å thick medium including a 300 Å TbFeCo layer enveloped by silicon nitride protective layers supported on a 1.2 mm thick × 135 mm (5.25 in.) diameter polycarbonate disk. Recording tracks had an approximate pitch of 1.6 μm separated by 800 Å deep peripheral grooves. Using a Buehler Isomet low-speed diamond saw, 1 mm wide and 20 mm long strips were cut out of the disk along the recording tracks.

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