Dynamic surface pressure measurements on a square cylinder with pressure sensitive paint

McGraw, Christina M.; Bell, James H.; Khalil, Gamal; Callis, James B.

doi:10.1007/s00348-005-0059-8

Cited by 23 publications

(8 citation statements)

References 15 publications

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“…This suggests that the highly porous silica TLC plate significantly increased the rate of oxygen diffusion through these PSPs as compared to the conventional ISSI PSP ͑227 s͒ that uses a polymeric supporting matrix. This effect, and similar response times for PSPs of this nature, was observed by both McGraw et al 17,20 and Sakaue and Sullivan. 18 The responses of the osmium-based PSPs are shown in Fig.…”

Section: Pressure Sensitive Paintssupporting

confidence: 75%

“…To date, fast responding PSP has been used to study airflow over rotor blades [13][14][15][16] and for measuring the unsteady pressure distribution on the side of a square cylinder during vortex shedding. 17 Studies have shown that the fastest responding PSPs have used matrices that are not polymer based. Sakaue and Sullivan 18 demonstrated that by using anodized aluminum as a supporting matrix, response times on the order of tens of microseconds are possible.…”

Section: A Psp and Psbeads Response Timesmentioning

confidence: 99%

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Development and characterization of fast responding pressure sensitive microspheres

Kimura

Rodríguez

McCann

et al. 2008

Review of Scientific Instruments

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The response times of pressure sensitive paint (PSP) and pressure sensitive microspheres to passing shockwaves were measured to investigate their ability to accurately determine pressure changes in unsteady flows. The PSPs tested used platinum tetra(pentafluorophenyl)porphine (PtTFPP), platinum octaethylporphine (PtOEP), and a novel set of osmium-based organometallic complexes as pressure sensitive luminophors incorporated into polymer matrices of dimethylsiloxane bisphenol A-polycarbonate block copolymer or polystyrene. Two types of pressure sensitive microspheres were used, the first being PtOEP-doped polystyrene microspheres (PSBeads) and the second being porous silicon dioxide microspheres containing the novel, pressure sensitive osmium complexes. Response times for the platinum-based PSPs ranged from 47.2 to 53.0 micros, while the osmium-based PSPs ranged between 37.6 and 58.9 micros. For the microspheres, 2.5 microm diameter PSBeads showed a response time of 3.15 ms, while the osmium-based silicon dioxide microspheres showed a response time ranging between 13.6 and 18.9 micros.

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Section: Pressure Sensitive Paintssupporting

confidence: 75%

Section: A Psp and Psbeads Response Timesmentioning

confidence: 99%

Development and characterization of fast responding pressure sensitive microspheres

Kimura

Rodríguez

McCann

et al. 2008

Review of Scientific Instruments

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“…For a 2 nd order system, the roll-off slope should be -40 dB/decade and the phase shift should level off at -180°. 42 Using a combination of the cftool command in Matlab and the equations used by Winslow et al 42 The trend of the response is similar to what was shown by McGraw 43 , however the high-frequency asymptote of the amplitude ratio is very steep, suggesting that this PSP model is that of higher order than a 2 nd order system. The amplitude ratio data fits well to the 4 th order system shown in (3.10), however, the phase shift seems to level off at -32° for high frequencies, which is much lower than what is expected from a higher order system.…”

Section: Psp Calibrationsupporting

confidence: 56%

Application of fast-responding pressure-sensitive paint to a hemispherical dome in unsteady transonic flow

et al. 2010

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“…McGraw et al [95] also used their PtTFBB/TLC plate paint formulation to resolve the unsteady pressure fluctuations on a square cylinder due to vortex shedding. They were able to measure [33] pressure changes as low as 230 Pa at a frequency of 95 to 125 Hz for a Reynolds number of 8.9 Â 10 4 .…”

Section: Acoustics Applicationsmentioning

confidence: 99%

A review of pressure-sensitive paint for high-speed and unsteady aerodynamics

Gregory

Asai

Kameda

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part G:

339

176

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Abstract:The current paper describes the development of pressure-sensitive paint (PSP) technology as an advanced measurement technique for unsteady flow fields and short-duration wind tunnels. Newly developed paint formulations have step response times approaching 1 ms, making them suitable for a wide range of unsteady testing. Developments in binder technology are discussed, which have resulted in new binder formulations such as anodized aluminium, thin-layer chromatography plate, polymer/ceramic, and poly(TMSP) PSP. The current paper also details modeling work done to describe the gas diffusion properties within the paint binder and understand the limitations of the paint response characteristics. Various dynamic calibration techniques for PSP are discussed, along with summaries of typical response times. A review of unsteady and high-speed PSP applications is presented, including experiments with shock tubes, hypersonic tunnels, unsteady delta wing aerodynamics, fluidic oscillator flows, Hartmann tube oscillations, acoustics, and turbomachinery. Flowfields with fundamental frequencies as high as 21 kHz have been successfully measured with porous PSP formulations.

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Dynamic surface pressure measurements on a square cylinder with pressure sensitive paint

Cited by 23 publications

References 15 publications

Development and characterization of fast responding pressure sensitive microspheres

Development and characterization of fast responding pressure sensitive microspheres

Application of fast-responding pressure-sensitive paint to a hemispherical dome in unsteady transonic flow

A review of pressure-sensitive paint for high-speed and unsteady aerodynamics

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