Describing the uncertainties in experimental results. Describing uncertainty in single sample experiments. Theory of transient experimental techniques for surface heat transfer. Advisory Group For Aerospace Research And Development Neuilly-Sur-Seine Neuilly-Sur-Seine 1973: AGARD-AG-165, University of Oxford. Heat-transfer measurements in short-duration hypersonic facilities. CFD analysis on the influence of helical carving in a vortex flow solar reactor. Design and fabrication of coaxial surface junction thermocouples for transient heat transfer measurements. Assessment of effective thermal product of surface junction thermocouples on millisecond and microsecond time scales. Making and testing small surface thermocouples for fast response. A special thermocouple for measuring transient temperatures. Experimental techniques for thermal product determination of coaxial surface junction thermocouples during short duration transient measurements. Review of hypersonic research investigations in IISc shock tunnel (HST1). Reddy NM, Nagashetty K, Jagadeesh G, Reddy KP. Calibration of a silver thin film gauge for short duration convective step heat load. Dynamic calibration of a coaxial thermocouples for short duration transient measurements. Forebody convective hypersonic heat transfer measurements over large-angle blunt cones. Jagadeesh G, Reddy NM, Nagashetty K, Reddy KP. Stagnation point heat flux in hypersonic high enthalpy flow. Convective heat-transfer rate distributions over a missile shaped body flying at hypersonic speeds. Transient temperature data analysis for a supersonic flight test. Measurement of transient tool-internal temperature fields during hard turning by insert-embedded thin film sensors. Comparative performance of K, E, and J-type fast response coaxial probes for short-period transient measurements. Performance assessment of thermal sensors during short-duration convective surface heating measurements. A fast response thermocouple for internal combustion engine surface temperature measurements. Marr MA, Wallace JS, Chandra S, Pershin L, Mostaghimi J. Effects of rear slant angles on the flow characteristics of Ahmed body. On the response of coaxial surface thermocouples for transient aerodynamic heating measurements. This investigation is analogous to aerodynamics heating facilities and the results are confirmed that these in-house fabricated coaxial thermocouples are capable to measure surface heat flux at different location of the aerodynamic vehicles. It has been noticed that, the average errors between experimental and numerical results are found in the range of ± 0.3% and ± 2.5% for transient temperature and surface heat flux respectively. The numerical analysis was performed by using software package Ansys-fluent for the experimental conditions to validate the experimental results. The K, E, and J-type coaxial thermocouples were used to measure surface heat flux over a flat plat at different angles of attack 0°, 15°, 30°, and 45° exposing them into a convective based flow environment. The coaxial thermocouples (CTs) have the response time in the range of milliseconds or less and they can capture the heating rate in impulsive ground-based conditions. The surface heat flux measurement is challenging in numerous engineering applications such as aerospace engineering, internal combustion engines, advanced manufacturing processes is challenging due to rapid change in flow conditions.
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