Application of Temperature and Pressure Sensitive Paints to DLR Hypersonic Facilities: “lessons learned”

2015 ◽  
Author(s):  
Walter H. Beck ◽  
Christian Klein ◽  
Ulrich Henne ◽  
Jan Martinez Schramm ◽  
Alexander Wagner ◽  
...  
Keyword(s):  
Lessons Learned ◽  
Pressure Sensitive ◽  
Temperature And Pressure

635 Development on Temperature and Pressure Sensitive Paint Using 2-Color Laser Induced Fluorescence

2003 ◽  
Vol 2003 (0) ◽  
pp. _635-1_-_635-5_
Author(s):  
Souichi SAEKI ◽  
Muneo YAMAOKA ◽  
Hidenobu TAKAO ◽  
Motoya KANETA ◽  
Kakuji OGAWARA
Keyword(s):  
Laser Induced Fluorescence ◽  
Pressure Sensitive Paint ◽  
Pressure Sensitive ◽  
Temperature And Pressure

Temperature- and Pressure-Sensitive Paint Measurements in Short-Duration Hypersonic Flow

AIAA Journal ◽  
2001 ◽  
Vol 39 (4) ◽  
pp. 654-659 ◽  
Author(s):  
J. P. Hubner ◽  
B. F. Carroll ◽  
K. S. Schanze ◽  
H. F. Ji ◽  
M. S. Holden
Keyword(s):  
Hypersonic Flow ◽  
Short Duration ◽  
Pressure Sensitive Paint ◽  
Pressure Sensitive ◽  
Temperature And Pressure

MEMS Microvalve for Harsh Environment

2003 ◽  
Author(s):  
Charles Seeley ◽  
Jeff Fortin ◽  
Todd Wetzel ◽  
Scott Sealing ◽  
Keith Fosen
Keyword(s):  
High Temperature ◽  
Failure Modes ◽  
Piezoelectric Materials ◽  
Lessons Learned ◽  
Control Flow ◽  
Ambient Conditions ◽  
Micro Electro Mechanical Systems ◽  
High Temperature And Pressure ◽  
Materials Modeling ◽  
Temperature And Pressure

There is a need for small valves which control flow at high temperature and pressure for a number of commercial and military applications. However, traditional solenoid actuated valves are typically expensive, heavy and subject to undesirable electrical and mechanical failure modes. Micromachining techniques, commonly used in the electronics industry, are finding more and more applications for Micro Electro Mechanical Systems (MEMS). Most of the previous work in the area of MEMS valves has been limited to low pressure/low temperature flows at ambient conditions. In this presentation, the development and testing of a two stage MEMS diaphragm valve that is capable of operating at high temperature and pressure gas flows is presented. Valve requirements, tolerances and thermal management are considered in the design. Valve fabrication processes, such as Reactive Ion Etching (RIE) and laser ablation, are discussed in detail. Issues related to the actuation of the microvalve are also discussed, including two approaches based on shape memory alloy and piezoelectric materials. Modeling and test results are presented throughout to identify successes and lessons learned.

Pressure Sensitive Paint Visualization of Pressure Distribution of Externally Pressurized Circular Thrust Gas Bearing With a Single Gas Supply Hole: Experimental Validation of Variation of Pressure Distribution by Supply Pressure

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Tomohiko Ise ◽  
Shuma Kobayashi ◽  
Kazuhiro Itoh ◽  
Toshihiko Asami
Keyword(s):  
Pressure Distribution ◽  
Complementary Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Pressure Sensitive Paint ◽  
Pressure Sensitive ◽  
Temperature And Pressure ◽  
Gas Bearing ◽  
Luminescence Characteristics ◽  
Gas Supply ◽  
Good Agreement

This study investigated the use of pressure sensitive paint (PSP) as new measuring technique for measuring the pressure distribution of a gas bearing. An externally pressurized circular thrust gas bearing with single gas supply hole was used as the test bearing to investigate the suitability of this technique. The test bearing was 30 mm in diameter, with a gas supply hole of diameter 0.7 mm. A coat of PtTFPP, the substance used as the PSP, was applied to the bearing surface using an air-assisted spray. The PSP luminescence characteristics were calibrated before the tests because of their dependency on temperature and pressure. The pressure distribution was obtained by averaging 50 images captured by a 12-bit complementary metal-oxide semiconductor (CMOS) camera. These experimental results were compared with the results of a numerical analysis based on the divergence formulation method. There was good agreement between the experimental and analytical results, thus demonstrating the effectiveness of using PSP for pressure distribution measurements.

scholarly journals PSP Measurement of Stator Vane Surface Pressures in a High Speed Fan

1998 ◽  
Author(s):  
Jan Lepicovsky
Keyword(s):  
High Speed ◽  
Suction Side ◽  
Lessons Learned ◽  
Operating Conditions ◽  
Meridional Plane ◽  
Pressure Sensitive Paint ◽  
Pressure Sensitive ◽  
Calibration Methods ◽  
Stator Vane ◽  
Recorded Image

This paper presents measurements of static pressures on the stator vane suction side of a high-speed single stage fan using the technique of pressure sensitive paint (PSP). The paper illustrates development in application of the relatively new experimental technique to the complex environment of internal flows in turbomachines. First, there is a short explanation of the physics of the PSP technique and a discussion of calibration methods for pressure sensitive paint in the turbomachinery environment. A description of the image conversion process follows. The recorded image of the stator vane pressure field is skewed due to the limited optical access and must be converted to the meridional plane projection for comparison with analytical predictions. The experimental results for seven operating conditions along an off-design rotational speed line are shown in a concise form, including performance map points, midspan static tap pressure distributions, and vane suction side pressure fields. Then, a comparison between static tap and pressure sensitive paint data is discussed. Finally, the paper lists shortcomings of the pressure sensitive paint technology and lessons learned in this high-speed fan application.

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