Eroding ribbon thermocouples: impulse response and transient heat flux analysis
Article
Article Title | Eroding ribbon thermocouples: impulse response and transient heat flux analysis |
---|---|
ERA Journal ID | 35105 |
Article Category | Article |
Authors | Buttsworth, David R. (Author), Stevens, Robert (Author) and Stone, C. Richard (Author) |
Journal Title | Measurement Science and Technology |
Journal Citation | 16 (7), pp. 1487-1494 |
Number of Pages | 8 |
Year | 2005 |
Place of Publication | United Kingdom |
ISSN | 0957-0233 |
1361-6501 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0957-0233/16/7/011 |
Web Address (URL) | http://iopscience.iop.org/0957-0233/16/7/011/ |
Abstract | We have investigated a particular type of fast-response surface thermocouple to determine if it is appropriate to use a one dimensional transient heat conduction model to derive the transient surface heat flux from the measurements of surface temperature. With these sensors, low thermal inertia thermocouple junctions are formed near the surface by abrasive wear. Using laser excitation, we obtained the impulse response of these commercially available devices. The response of particular sensors can vary if new junctions are created by abrasive wear. Furthermore, the response of these sensors was found to deviate substantially from the one dimensional model and varied from sensor to sensor. The impulse response was simulated with greater fidelity using a two dimensional finite element model, but three dimensional effects also appear to be significant. The impact of these variations on the derived heat flux is assessed for the case of measurements in an internal combustion engine. When the measured impulse response is used to derive the surface heat flux, the apparent reversal of heat flux during the expansion stroke does not occur. |
Keywords | transient heat flux; surface temperature measurement; fast response; eroding; surface junction thermocouples; internal combustion engine heat flux; aerothermodynamic measurements; internal ballistics research |
ANZSRC Field of Research 2020 | 510304. Thermodynamics and statistical physics |
511099. Synchrotrons and accelerators not elsewhere classified | |
401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics) | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | University of Oxford, United Kingdom |
https://research.usq.edu.au/item/9x874/eroding-ribbon-thermocouples-impulse-response-and-transient-heat-flux-analysis
Download files
2390
total views885
total downloads0
views this month2
downloads this month