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http://dx.doi.org/10.6108/KSPE.2021.25.2.034

Heat Flux Measurements in High Velocity Oxygen-Fuel Torch Flow for Testing High Thermal Materials  

Chinnaraj, Rajesh Kumar (High-Enthalpy Plasma Research Center, Jeonbuk National University)
Choi, Seong Man (High-Enthalpy Plasma Research Center, Jeonbuk National University)
Hong, Seong Min (High-Enthalpy Plasma Research Center, Jeonbuk National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.25, no.2, 2021 , pp. 34-41 More about this Journal
Abstract
A commercial HVOF torch (originally designed for coating applications) has been modified as a high temperature flow source for material testing. In this study, a water cooled commercial Gardon gauge was used to measure heat fluxes at four locations away from the nozzle exit. The cooling water temperature data were used to calculate calorimetric heat fluxes at the same locations. The heat fluxes from both methods were compared and the calorimetric heat fluxes were found to be many times higher than the Gardon gauge heat fluxes. A hypothesis is applied to the calorimetric method to understand the discrepancy seen between the methods. The Gardon gauge heat fluxes are seen to be in the range of the hypothesized calorimetric calculations. This can be considered as a considerable validation for the hypothesis, but further refinement needed using appropriate numerical models.
Keywords
HVOF; Gardon Gauge; Calorimetric Heat Flux; Material Testing;
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