Prototype thin-film thermocouple/heat-flux sensor for a ceramic-insulated diesel engine
A platinum versus platinum-13 percent rhodium thin-film thermocouple/heat-flux sensor was devised and tested in the harsh, high-temperature environment of a ceramic-insulated, low-heat-rejection diesel engine. The sensor probe assembly was developed to provide experimental validation of heat transfer and thermal analysis methodologies applicable to the insulated diesel engine concept. The thin-film thermocouple configuration was chosen to approximate an uninterrupted chamber surface and provide a one dimension heat-flux path through the probe body. The engine test was conducted by Purdue University for Integral Technologies Inc., under a DOE-funded contract managed by NASA Lewis Research Center. The thin-film sensor performed reliably during 6 to 10 hr of repeated engine runs at indicated mean surface temperatures up to 950 k. However, the sensor suffered partial loss of adhesion in the thin-film thermocouple junction area following maximum cyclic temperature excursions to greater than 1150 k. 11 refs., 10 figs., 2 tabs.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- DOE Contract Number:
- AI01-86CE50162
- OSTI ID:
- 5357451
- Report Number(s):
- DOE/NASA/50162-1; NASA-TM-100798; ON: DE88007320
- Country of Publication:
- United States
- Language:
- English
Similar Records
On heat transfer measurements in diesel engines using fast-response coaxial thermocouples
A thin-film thermocouple for transient heat transfer measurements in ceramic-coated combustion chambers
Related Subjects
330102* -- Internal Combustion Engines-- Diesel
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
CERAMICS
DESIGN
DIESEL ENGINES
ELEMENTS
ENERGY TRANSFER
ENGINES
HEAT ENGINES
HEAT TRANSFER
HIGH TEMPERATURE
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
METALS
PLATINUM
PLATINUM METALS
RHODIUM
TEMPERATURE MEASUREMENT
THERMOCOUPLES
TRANSITION ELEMENTS