Experimental Heat Transfer Study in an Intermediate Turbine Duct

Rojo, Borja; Chernoray, Valery; Johansson, Martin; Golubev, Maxim

doi:10.2514/6.2013-3622

Cited by 2 publications

(3 citation statements)

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“…The angular dependency ε(θ) is not covered in the camera calibration and was experimentally evaluated using Equation (8). T 4 bb (i, θ) is the camera-perceived temperature with increased θ, T 4 bb (i, 0) is the perceived temperature at θ = 0 and T b is the background temperature.…”

Section: Emissivity Directionality and Temperature Dependencementioning

confidence: 99%

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Infrared Thermography Investigation of Heat Transfer on Outlet Guide Vanes in a Turbine Rear Structure

Jonsson

Chernoray

Dhanasegaran

2020

IJTPP

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Aerothermal heat transfer measurements in fluid dynamics have a relatively high acceptance of uncertainty due to the intricate nature of the experiments. The large velocity and pressure gradients present in turbomachinery application add further complexity to the measurement procedure. Recent method and manufacturing development has addressed some of the primary sources of uncertainty in these heat transfer measurements. However, new methods have so far not been applied in a holistic approach for heat transfer studies. This gap is bridged in the present study where a cost-effective and highly accurate method for heat transfer measurements is implemented, utilising infrared thermography technique (IRT) for surface temperature measurement. Novel heat transfer results are obtained for the turbine rear sturcture (TRS), at engine representative conditions for three different outlet guide vane (OGV) blade loading and at Reynolds Number of 235000. In addition to that, an extensive description of the implementation and error mitigation is presented.

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Section: Emissivity Directionality and Temperature Dependencementioning

confidence: 99%

“…The heat transfer measurement approach used in the present study is based on techniques previously utilized at Chalmers. Initially, in an intermediate turbine duct by Arroyo et al [3] and by Rojo et al [4]. The method was later expanded for work in a linear cascade by Rojo et al [5] and Wang et al [6].…”

Section: Introductionmentioning

confidence: 99%

Infrared Thermography Investigation of Heat Transfer on Outlet Guide Vanes in a Turbine Rear Structure

Jonsson

Chernoray

Dhanasegaran

2020

IJTPP

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“…This is a MWIR Phoenix Camera System with a resolution of 320x256. This camera has been used in previous experiments in a large-scale low-speed annular cascade rig (see [12], [13]). Before the experiment starts, the camera must be calibrated and a non-uniformity correction is applied.…”

Section: Ir-cameramentioning

confidence: 99%

Experimental Heat Transfer Study of Endwall in a Linear Cascade with IR Thermography

Rojo

Jiménez

Chernoray

2014

EPJ Web of Conferences

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Abstract. This abstract presents an endwall heat transfer experimental data of air flow going through outlet guide vanes (OGVs) situated in a low speed linear cascade. The measurement technique for this experiment was infrared thermography. In order to calculate the heat transfer coefficient (HTC) on the endwall, it has been used an instrumented window with a controlled constant temperature in one side of a 5 millimeter Plexiglass in order to generate high temperature gradients and, therefore, by measuring the surface temperature one the other side of the Plexiglass, it is calculated the HTC. Due to the fact that Plexiglass material has not good optical properties at infrared spectrum, it has been used a thin layer of black paint (10-12 μm) which has high emissivity (0.973) in the range of temperature that we are working. The Reynolds number for this experiment is 300000 in on and off-design configuration of the OGVs (on-design 25• and off-design cases are 40• and -25• incident angle). Furthermore, the on-design case is run at two different Reynolds number, 300000 and 450000. During this experiments it can be seen how changing the inlet angle to the OGVs produces significant differences on the heat transfer along the endwall. The main objective for this investigation is to study the heat transfer along the endwall of a linear cascade so that it would be a well-defined test case for CFD validation.

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Experimental Heat Transfer Study in an Intermediate Turbine Duct

Cited by 2 publications

References 0 publications

Infrared Thermography Investigation of Heat Transfer on Outlet Guide Vanes in a Turbine Rear Structure

Infrared Thermography Investigation of Heat Transfer on Outlet Guide Vanes in a Turbine Rear Structure

Experimental Heat Transfer Study of Endwall in a Linear Cascade with IR Thermography

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