Thermoacoustic couple
An apparatus and method for determining acoustic power density level and its direction in a fluid using a single sensor are disclosed. The preferred embodiment of the apparatus, which is termed a thermoacoustic couple, consists of a stack of thin, spaced apart polymeric plates, selected ones of which include multiple bimetallic thermocouple junctions positioned along opposite end edges thereof. The thermocouple junctions are connected in series in the nature of a thermopile, and are arranged so as to be responsive to small temperature differences between the opposite edges of the plates. The magnitude of the temperature difference, as represented by the magnitude of the electrical potential difference generated by the thermopile, is found to be directly related to the level of acoustic power density in the gas.
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- Dept. of Energy
- Application Number:
- ON: DE84011296
- OSTI ID:
- 6853261
- Country of Publication:
- United States
- Language:
- English
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