Infrared thermography and calibration techniques for gas turbine applications: A review

Falsetti, Chiara; Sisti, M.; Beard, Paul F.

doi:10.1016/j.infrared.2020.103574

Cited by 16 publications

(6 citation statements)

References 53 publications

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“…The surface heat flux was primarily measured by employing infrared thermography with additional individual thin film gauges to support and validate the infrared measurements. infrared thermography spatially resolves the 2D flow structures at the wall and crucially, the non-intrusive [23,24] nature of this technique permits measurements directly on the porous injector without impeding or otherwise disturbing the coolant outflow. A series of calibration steps, further detailed in Ref.…”

Section: Heat Transfer Measurementsmentioning

confidence: 99%

Transpiration-Cooling Heat Transfer Experiments in Laminar and Turbulent Hypersonic Flows

Naved¹,

Hermann²,

Hambidge³

et al. 2023

Journal of Thermophysics and Heat Transfer

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The design of a transpiration cooled system requires detailed local heat transfer information on and in the vicinity of the porous injector; however, limited spatially resolved experimental studies exist, particularly in hypersonic flows. In this work experiments were conducted in the Oxford High Density Tunnel at Mach 6.1 in both laminar and turbulent regimes. Spatially resolved 2D surface heat transfer measurements were acquired by imaging directly on and downstream of two micro-porous transpiration cooled injectors (METAPOR CE170 and Zirconia) using high-speed infra-thermography. Whilst injection in the laminar regime results in a steady, monotonic reduction in heat transfer from the start of the injector, a flatter profile is present for the turbulent cases where turbulent mixing inhibits surface heat transfer reduction.

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Section: Heat Transfer Measurementsmentioning

confidence: 99%

Transpiration-Cooling Heat Transfer Experiments in Laminar and Turbulent Hypersonic Flows

Naved¹,

Hermann²,

Hambidge³

et al. 2023

Journal of Thermophysics and Heat Transfer

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“…The size of the detector is small and the installing way of magnetic suction is suitable for the status monitoring of the complex oil pipes of the gas turbine. In order to ensure the accuracy of the temperature data, the special calibration equipment is used [20]. The infrared calibration equipment uses ISOTECH Gemini R976/550 shown in figure 4, the high precision portable black body radiation source to calibre the infrared detector.…”

Section: Experimental Studymentioning

confidence: 99%

Infrared monitoring and identification of lubricating oil pipe on a gas turbine based on faster RCNN

Yin

夏²,

王³

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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The reliable work of gas turbine depends heavily on the good operation of the lubricating oil system and monitoring the temperature of lubricating oil removing heat from the heated end components can indirectly reflect the working state of the gas turbine, so the research on the infrared monitoring and identification of lubricating oil pipe on a gas turbine is of great significance to analyze the working state of the gas turbine. The method of infrared detection and recognition based on deep neural network is proposed in this paper, three different pipes were identified in a certain field of vision. The network obtained was tested by testing data sets and was found to be unable to give a unique label to an object in the image, and it was not effective to identify the infrared characteristics of the lubricating oil pipe. In order to accurately identify the three pipes, the pre-training AlexNet, Vgg16, Vgg19 and Resnet50 networks were used for training and testing the pipes by Faster RCNN algorithm. The results show that the method can accurately identify the lubricating oil pipe and other parts on the gas turbine, and the identification accuracy are more than 80%. Comparing with the training and testing results of four kinds of the transfer networks, the detection accuracy of Resnet50 transfer network for the oil pipe was lower than that of the other three transfer networks in the case of background interference, and the accuracy of the method was 89.5%.

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“…This study uses a FLIR A6751 SLS LWIR camera, which was chosen for its sensitivity and speed. The camera features a 640 × 512 [2], where 𝐸 𝑡 is the energy from the target, 𝐸 𝑟 the energy from surroundings reflected on the target, 𝐸 𝑤 the energy from the IR-transparent window, and 𝐸 𝑔 the energy from the mainstream gas.…”

Section: Infrared Thermography In the Otrfmentioning

confidence: 99%

“…An extensive review of calibration studies for both pyrometer and IR cameras in turbomachinery applications is presented by Falsetti et al [2]. The common approach, especially for stationary targets, is to calibrate the infrared thermography system in situ employing thermocouples embedded in the object surface.…”

Section: Introductionmentioning

confidence: 99%

“…1. (a) Image of the OTRF test section; (b) Schematic highlighting the energy components detected by an infrared system in a turbomachinery experiment[2], where 𝐸 𝑡 is the energy from the target, 𝐸 𝑟 the energy from surroundings reflected on the target, 𝐸 𝑤 the energy from the IR-transparent window, and 𝐸 𝑔 the energy from the mainstream gas.…”

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confidence: 99%

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Infrared Temperature Measurements on Fast Moving Targets: A Novel Calibration Approach

Sisti

Falsetti

Beard

2023

Preprint

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Infrared thermography and calibration techniques for gas turbine applications: A review

Cited by 16 publications

References 53 publications

Transpiration-Cooling Heat Transfer Experiments in Laminar and Turbulent Hypersonic Flows

Transpiration-Cooling Heat Transfer Experiments in Laminar and Turbulent Hypersonic Flows

Infrared monitoring and identification of lubricating oil pipe on a gas turbine based on faster RCNN

Infrared Temperature Measurements on Fast Moving Targets: A Novel Calibration Approach

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