The Application of Pressure- and Temperature-Sensitive Paints to an Advanced Compressor

Navarra, Kelly R.; Rabe, Douglas C.; Fonov, Sergey; Goss, L. P.; Hah, Chunill

doi:10.1115/1.1400116

Cited by 24 publications

(13 citation statements)

References 14 publications

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“…There have been several studies involving the use of PSP for measurement of steady pressures in turbomachinery. Investigations such as those of Liu et al [98], Torgerson et al [99], Bencic [100], Jordan et al [59,60], or Navarra et al [101] have effectively implemented PSP and TSP for measurement of steady pressures in the rotating frame of reference. Very few investigations, however, have attempted to resolve the unsteady pressure fluctuations inherent in turbomachinery.…”

Section: Turbomachinerymentioning

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

182

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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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Section: Turbomachinerymentioning

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

182

View full text Add to dashboard Cite

show abstract

“…To account for model distortions, eight marker dots were applied to the surface with a felt tip pen at known locations. The location of each marker dot was entered into the OMS software and image registration was accounted for using an eight-step quantum pixel energy distribution (QPED) algorithm as described by Navarra et al (2001) with three iterations and an initial box size of 16 × 16 pixels. Due to the paint's thermal and pressure dependence, the PSP was calibrated by a second-order least-squares approximation with known temperatures and pressures.…”

Section: Schlieren Photographymentioning

confidence: 99%

Response of supersonic turbulent boundary layers to local and global mechanical distortions

et al. 2009

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The response of the mean and turbulent flow structure of a supersonic high-Reynolds-number turbulent boundary layer flow subjected to local and global mechanical distortions was experimentally examined. Local disturbances were introduced via small-scale wall patterns, and global distortions were induced through streamline curvature-driven pressure gradients. Local surface topologies included k-type diamond and d-type square elements; a smooth wall was examined for comparison purposes. Three global distortions were studied with each of the three surface topologies. Measurements included planar contours of the mean and fluctuating velocity via particle image velocimetry, Pitot pressure profiles, pressure sensitive paint and Schlieren photography. The velocity data were acquired with sufficient resolution to characterize the mean and turbulent flow structure and to examine interactions between the local surface roughness distortions and the imposed pressure gradients on the turbulence production. A strong response to both the local and global distortions was observed with the diamond elements, where the effect of the elements extended into the outer regions of the boundary layer. It was shown that the primary cause for the observed response was the result of local shock and expansion waves modifying the turbulence structure and production. By contrast, the square elements showed a less pronounced response to local flow distortions as the waves were significantly weaker. However, the frictional losses were higher for the blunter square roughness elements. Detailed quantitative characterizations of the turbulence flow structure and the associated production mechanisms are described herein. These experiments demonstrate fundamental differences between supersonic and subsonic rough-wall flows, and the new understanding of the underlying mechanisms provides a scientific basis to systematically modify the mean and turbulence flow structure all the way across supersonic boundary layers.

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“…Rotor blades are a suitable object to which to apply fast response PSPs. In this paper, we focus on the application of fast-response PSP to compressors [14][15][16][17]. From the PSP measurement point of view, a remarkable characteristic of compressors is that the temperature of the measurement environment exceeds 100 • C. Previous studies have demonstrated that measurements can be made, but it is not clear whether the accuracy is sufficient to evaluate the performance of the compressor.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Improvement of Heat Resistance of a Polymer-Ceramic Pressure-Sensitive Paint at High Temperatures

Furuya

Nakai

Imai

et al. 2021

Sensors

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Degradation of fast response pressure-sensitive paints (PSP) above room temperature is a serious problem for PSP measurements in high-temperature environments. A standard polymer-ceramic PSP (PC-PSP) composed of platinum(II)-5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorphenyl)-porphyrin (PtTFPP), titania particles and poly(isobutyl methacrylate) (polyIBM) was characterized to elucidate the degradation mechanism. Applying a two-gate lifetime-based method, the PC-PSP has sufficient pressure and temperature sensitivities even at 100 °C, while the luminescence intensity significantly decreases during the test. Subsequent measurements on thermal and photostability as well as luminescence spectra reveal that the main cause of the degradation is the photodegradation of PtTFPP due to direct exposure of the dye molecules to the atmosphere. In order to suppress such degradation, a small amount of urethane resin is added to the dye solution as a simple additional step in the preparation of PC-PSP. The addition of the urethane resin significantly reduces the degradation of the PSP, although its time response is slightly slower than that of the standard PC-PSP.

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The Application of Pressure- and Temperature-Sensitive Paints to an Advanced Compressor

Cited by 24 publications

References 14 publications

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

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

Response of supersonic turbulent boundary layers to local and global mechanical distortions

Characterization and Improvement of Heat Resistance of a Polymer-Ceramic Pressure-Sensitive Paint at High Temperatures

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