Measurement of boundary layer transition on oscillating airfoil using cntTSP in low-speed wind tunnel

Ikami, Tsubasa; Fujita, Koji; Nagai, Hiroki; Yorita, Daisuke

doi:10.1088/1361-6501/abe2be

Cited by 8 publications

(3 citation statements)

References 34 publications

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“…These TSPs exhibited an exceptionally high temperature sensitivity in a range from −35 • C to 100 • C, low pressure sensitivity, and good photostability [209]. This luminescent lanthanide complex was thereupon used for the detection of boundary layer transitions [210][211][212][213][214], for skin-friction-based measurements [215,216], and for experiments under water [217,218].…”

Section: Temperature-sensitive Paintsmentioning

confidence: 99%

The Art of Fluorescence Imaging with Chemical Sensors: The Next Decade 2012–2022

Schäferling,

Ondrus

2024

Chemosensors

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Imaging methods by the means of optical sensors are applied in diverse scientific areas such as medical research and diagnostics, aerodynamics, environmental analysis, or marine research. After a general introduction to the field, this review is focused on works published between 2012 and 2022. The covered topics include planar sensors (optrodes), nanoprobes, and sensitive coatings. Advanced sensor materials combined with imaging technologies enable the visualization of parameters which exhibit no intrinsic color or fluorescence, such as oxygen, pH, CO2, H2O2, Ca2+, or temperature. The progress on the development of multiple sensors and methods for referenced signal read out is also highlighted, as is the recent progress in device design and application formats using model systems in the lab or methods for measurements’ in the field.

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Section: Temperature-sensitive Paintsmentioning

confidence: 99%

The Art of Fluorescence Imaging with Chemical Sensors: The Next Decade 2012–2022

Schäferling,

Ondrus

2024

Chemosensors

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“…Yorita et al and Ikami et al quantitatively evaluated the static and quasi-static transition points on a wing model surface in low-speed wind tunnel tests using cntTSP [14][15][16]. Moreover, Ikami et al dynamically evaluated the motion of the transition points on a pitching airfoil under low-speed conditions [17]. This study measured the transition points on an airfoil moving at a maximum frequency of 4.2 Hz.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the frequency characteristics of cntTSP measurement for unsteady low-speed flow

Ikami

Konishi

Nagai

2023

Meas. Sci. Technol.

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cntTSP is a fluid measurement technology that utilizes temperature-sensitive paint (TSP). It works as an optical temperature sensor, with a thin layer of carbon nanotubes (CNT) to heat the TSP layer. This study investigated the frequency characteristics of cntTSP measurements in low-speed flow. The flow field on the flat plate was periodically changed by introducing intermittent local disturbances to the flat plate in a low-speed wind tunnel test. cntTSP measurement was conducted behind the local disturbance to evaluate changes in the temperature associated with periodic changes in the flow. The amplitude of the temperature change decreased approximately linearly with the frequency in a double-logarithmic graph. Moreover, the temperature amplitude at 25 Hz was 0.0082 K, and it was necessary to detect a very small temperature change to evaluate high-frequency phenomena.

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“…Recently, TSP with carbon nano-tubes (CNT) thin heating layer, called cntTSP, has been developed [ 15 , 16 ]. The cntTSP has been used for the boundary layer transition measurement under various conditions, from cryogenic wind tunnels to low-speed wind tunnels [ 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Formulations on Characteristics of Ruthenium-Based Temperature-Sensitive Paints

Ikami

Fujita

Nagai

2022

Sensors

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Temperature-sensitive paint (TSP) can optically measure a global temperature distribution using a thermal quenching of dye molecules. The TSP measurement is often used in wind tunnel tests to measure the temperature and flow fields in the aerodynamic field. The measurement accuracy is affected by the characteristics of TSP, such as temperature sensitivity, pressure dependency, luminescent intensity, photostability, and surface condition. The characteristics depend on the formulation of TSP. This study investigates the characteristics of the TSP using dichlorotris (1,10-phenanthroline) ruthenium(II) hydrate (Ru-phen). We compare the characteristics of TSPs using different polymers, solvents, and dye concentrations. The TSPs using polyacrylic acid as a polymer shows linear calibration curves, high luminescent intensity, high photostability, and smooth surface. On the other hand, the TSPs using polymethyl methacrylate have nonlinear calibration curves, low luminescent intensity, strong photodegradation, and a rough surface.

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Measurement of boundary layer transition on oscillating airfoil using cntTSP in low-speed wind tunnel

Cited by 8 publications

References 34 publications

The Art of Fluorescence Imaging with Chemical Sensors: The Next Decade 2012–2022

The Art of Fluorescence Imaging with Chemical Sensors: The Next Decade 2012–2022

Evaluation of the frequency characteristics of cntTSP measurement for unsteady low-speed flow

Influence of Formulations on Characteristics of Ruthenium-Based Temperature-Sensitive Paints

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