We examined numerical and experimental use of a coupled-transducer system comprised of a thermocouple temperature measurements and time of flight acoustic measurements to determine the recession rate of a carbon material. A problem in the use of ultrasonic transducers for high temperature thickness measurements is that the temperature of the specimen is not always known. The variation of the speed of sound with temperature makes this a challenging problem and the use of a limited number of temperature measurements helps to construct a temperature profile on which the acoustic time of flight measurement can be characterized. In the problem of interest, a high heat flux is directed towards the surface of a carbon based material. A temperature profile is set up in the material. Initially the heated face simply increases in temperature with no mass loss. With increasing heating and oxygen transport to the surface, the hot face begins to oxidatively erode. Temperature measurements Y (xi) are made at xi locations within the material. At the same time a time of flight measurement is made in the material. We can assume that the time of flight measurement takes place over a time period that is small relative to the time for which the spatial temperature variation evolves. As such, the time of flight measurement primarily involves a weighted spatial integration of a function of temperature. Given the temperature measurements and the time of flight measurement, we seek the recession rate or equivalently, the sample length. We develop a simple thermal model with appropriate representation of oxidation kinetics to describe the process. A simple inversion analysis is developed and tested on synthetic data to best fit the experimental data.
Skip Nav Destination
ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology
July 14–19, 2013
Minneapolis, Minnesota, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-5548-5
PROCEEDINGS PAPER
Recession Experiments and Modeling for Carbon Surface Oxidation Processes
Andrew Kurzawski,
Andrew Kurzawski
University of Texas at Austin, Austin, TX
Search for other works by this author on:
Ofodike A. Ezekoye,
Ofodike A. Ezekoye
University of Texas at Austin, Austin, TX
Search for other works by this author on:
Joseph H. Koo,
Joseph H. Koo
KAI, LLC, Austin, TX
University of Texas at Austin, Austin, TX
Search for other works by this author on:
Colin Yee,
Colin Yee
University of Texas at Austin, Austin, TX
Search for other works by this author on:
Theodore Hardee
Theodore Hardee
University of Texas at Austin, Austin, TX
Search for other works by this author on:
Andrew Kurzawski
University of Texas at Austin, Austin, TX
Ofodike A. Ezekoye
University of Texas at Austin, Austin, TX
Joseph H. Koo
KAI, LLC, Austin, TX
University of Texas at Austin, Austin, TX
Colin Yee
University of Texas at Austin, Austin, TX
Theodore Hardee
University of Texas at Austin, Austin, TX
Paper No:
HT2013-17544, V002T05A015; 13 pages
Published Online:
December 21, 2013
Citation
Kurzawski, A, Ezekoye, OA, Koo, JH, Yee, C, & Hardee, T. "Recession Experiments and Modeling for Carbon Surface Oxidation Processes." Proceedings of the ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. Volume 2: Heat Transfer Enhancement for Practical Applications; Heat and Mass Transfer in Fire and Combustion; Heat Transfer in Multiphase Systems; Heat and Mass Transfer in Biotechnology. Minneapolis, Minnesota, USA. July 14–19, 2013. V002T05A015. ASME. https://doi.org/10.1115/HT2013-17544
Download citation file:
7
Views
0
Citations
Related Proceedings Papers
Related Articles
Inverse Heat Transfer Solution of the Heat Flux Due to Induction Heating
J. Manuf. Sci. Eng (August,2005)
Continuous Monitoring of Binary Gas Mixture Concentration With Application to Turbine Blade Cooling Experiments
J. Turbomach (July,2000)
Toward An Ultrasonic Sensor for Pressure Vessels
J. Pressure Vessel Technol (May,2008)
Related Chapters
Introduction and Scope
High Frequency Piezo-Composite Micromachined Ultrasound Transducer Array Technology for Biomedical Imaging
Clinical issues and experience
Mechanical Blood Trauma in Circulatory-Assist Devices
The Special Characteristics of Closed-Cycle Gas Turbines
Closed-Cycle Gas Turbines: Operating Experience and Future Potential