Experimental Study of Heat Transfer Measurement using Temperature-Sensitive Paint for High-Temperature Application in Hypersonic Flow

Nagai, Hiroki; Sawamura, Ryota; Asai, Keisuke

doi:10.2514/6.2011-850

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…The paint employed in this study consisted of Ruphen as the luminophore, polyacrylic acid as the binder, and ethanol as the solvent. Ruphen is a type of Ruthenium complex and a type of typical temperature sensitive luminophore used for TSP [15].…”

Section: Temperature Sensitive Paintmentioning

confidence: 99%

Experimental Study on Aerodynamic Heating Induced by Dual Injections into Hypersonic Cross Flow

Taguchi

Mori

Nakamura

2017

International Journal of Aerospace Engineering

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In this study, the distribution of surface heat transfer induced by dual side-jets injected into a hypersonic flow has been visualized using a temperature sensitive paint. The experiments were performed in both tandem and parallel injector arrangements, and the spacing between the injection holes was taken as a parameter in each arrangement. As a result, the aerodynamic heating in the separated region of the boundary layer and in the horseshoe vortex was clearly visualized. In the tandem arrangements, heat transfer remarkably increased immediately upstream of the front injector. The distributions and the intensity of surface heat transfer were similar to those caused by the single injection. On the other hand, in the parallel arrangements, the extent of the separation nearly doubled, and the maximum heat flux decreased to less than half of that from the single injection. The global distribution of heat transfer varied significantly as the injector spacing was changed. When the injectors were positioned with a large spacing, the interaction between the side-jets was relatively lowered, and thus distribution, as for the single injector, was induced around each injection hole individually. In contrast, with a short spacing, the dual injection behaved as a single obstacle. The most effective reduction of maximum heat flux was achieved with an intermediate injector spacing.

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Section: Temperature Sensitive Paintmentioning

confidence: 99%

Experimental Study on Aerodynamic Heating Induced by Dual Injections into Hypersonic Cross Flow

Taguchi

Mori

Nakamura

2017

International Journal of Aerospace Engineering

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“…In present paper, Fluorescein is employed to obtain reference image and Ruphen is used for test image observation. Ruphen is a kind of Ruthenium complex, and one of typical luminophore of TSP 13) . Polyacrylic acid and ethanol is used as binder and solvent of TSP, respectively.…”

Section: Compositions Of the Paintmentioning

confidence: 99%

Measurements by Temperature Sensitive Paint on Flexible and Deforming Model in Hypersonic Flow

Taguchi

Maruyama

Sato

et al. 2016

AEROSPACE TECHNOLOGY JAPAN

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Temperature measurement on deforming aeroshell model was performed in hypersonic test flow. Temperature Sensitive Paint (TSP) was used to measure surface temperature on the model. Generally, TSP is not available on flexible surface due to a problem in normalization procedure of images. Present paper describes the improved methodology of TSP which is able to apply to flexible and deforming model surface. For the improved TSP, two different kinds of luminophore, namely Ruphen and Fluorescein, are employed to observe reference image and test image simultaneously. An optical system is produced to detect the luminescence from Ruphen and Fluorescein separately. Results indicate that temperature rise caused by aerodynamic heating is observed, and the temperature distribution measured by the improved TSP method on flexible model shows qualitative agreement with the one obtained by conventional TSP measurement on rigid model which simulates deformed model configuration. Furthermore, the temperature measurement by this method shows good capability to follow model deformation.

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“…TSPs possess the advantages of high temperature sensitivity, small measurement error, and simple manufacture for convenient applications. [ 2–5 ] Recently, TSPs have been widely used in various aerodynamic experiments to measure the surface heat transfer and temperature distribution of the measured objects. [ 6–9 ]…”

Section: Introductionmentioning

confidence: 99%

Temperature sensitive properties and preparation of europium complexes with double ligands

et al. 2021

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Temperature sensitive paints (TSPs) are a class of rising materials for non‐contact temperature measurement technology. Efficient complexes with remarkable luminescent properties play the core role in TSPs. Rare earth organic complexes are often used as probe molecules for TSPs because of their long fluorescence lifetime, narrow fluorescence emission peaks, high fluorescence intensity, and large Stokes shift. Herein, two europium‐based complexes, Eu(PCCA)3phen and Eu (PMCA)3phen, were synthesized under hydrothermal conditions, using europium(III) oxide (Eu2O3), p‐chlorocinnamic acid (PCCA), p‐methoxy cinnamic acid (PMCA) and 1,10‐phenanthroline (phen) as raw materials. Two temperature sensitive paints (Eu(PCCA)3phen/PMMA and Eu(PMCA)3phen/PMMA) were obtained by the polymerization of methyl methacrylate (MMA) with different europium complexes. The structure, morphology, luminescent properties of the europium complexes and temperature quenching properties of the TSPs were characterized by infrared (IR) spectroscopy, scanning electron microscopy (SEM), and fluorescence spectroscopy. The fluorescence results show that both of the two TSPs have good temperature quenching performance in the range 20–100°C with high sensitivity 50–60°C and 80–90°C, respectively. Furthermore, the highest sensitivity of Eu(PCCA)3phen/PMMA is greater than that of Eu(PMCA)3phen/PMMA. This work can provide a universal way for preparing efficient TSPs in practical applications.

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Experimental Study of Heat Transfer Measurement using Temperature-Sensitive Paint for High-Temperature Application in Hypersonic Flow

Cited by 7 publications

References 4 publications

Experimental Study on Aerodynamic Heating Induced by Dual Injections into Hypersonic Cross Flow

Experimental Study on Aerodynamic Heating Induced by Dual Injections into Hypersonic Cross Flow

Measurements by Temperature Sensitive Paint on Flexible and Deforming Model in Hypersonic Flow

Temperature sensitive properties and preparation of europium complexes with double ligands

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