Results 81 to 90 of about 11,617 (186)
On the Frequency Response of Nanostructured Thermoacoustic Loudspeakers
Nanomaterials, 2018 In this work, we investigate the thermal and acoustic frequency responses of nanostructured thermoacoustic loudspeakers. An opposite frequency dependence of thermal and acoustic responses was found independently of the device substrate (Kapton and glass)
Paolo La Torraca +6 more
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Thermoacoustic refrigeration for space applications
Space Programs and Technologies Conference, 1991 A thermoacoustic refrigerator has been designed, tested, and certified by NASA to be flown aboard the space-shuttle get-away-special (GAS) payload program on STS-42 in January 1992. This thermoacoustic heat pump uses acoustic power to pump heat from a low-temperature source to a high-temperature sink. It has only 15 g of moving mass operating at 400 Hz,
Garrett, Steven L. +2 more
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Applied SciencesExisting thermoacoustic dynamic measurement instrumentation is typically expensive and relies on proprietary designs, sensors, and acquisition equipment.
Carmen Iniesta +4 more
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Electromagnetic–Acoustic Sensing for Biomedical Applications
Sensors, 2018 This paper reviews the theories and applications of electromagnetic–acoustic (EMA) techniques (covering light-induced photoacoustic, microwave-induced thermoacoustic, magnetic-modulated thermoacoustic, and X-ray-induced thermoacoustic) belonging to
Siyu Liu +3 more
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, 1991 A new refrigerator which uses resonant high amplitude sound in inert gases to pump heat is described and demonstrated. The phasing of the thermoacoustic cycle is provided by thermal conduction. This 'natural' phasing allows the entire refrigerator to operate with only one moving part (the loudspeaker diaphragm).
Garrett, Steven L., Hofler, Thomas J.
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, 2003 Thermoacoustic refrigerators have typically been designed to cool an isolated working fluid, necessitating a heat exchanging device to draw heat from the outside target fluid into the cooled working fluid. For example, a thermoacoustic refrigerator designed to chill air might utilize argon as an isolated working fluid, necessitating a heat exchanger to
openaire +3 more sources
Advances and Challenges in Thermoacoustic Network Modeling for Hydrogen and Ammonia Combustors
EnergiesThe transition to low-carbon energy systems has heightened interest in hydrogen and ammonia as sustainable alternatives to traditional hydrocarbon fuels.
Seungmin Guk +3 more
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The Influence of Heat Input Ratio on Electrical Power Output of a Dual-Core Travelling-Wave Thermoacoustic Engine [PDF]
This paper presents an analytical and experimental investigation of an electricity generator that employs a two-stage looped tube travellin -wave thermoacoustic prime-mover to deliver acoustic power from heat energy, a loudspeaker to extract electricity ...
Hann, D. +3 more
core
Frequency dependence of microwave thermo-acoustic imaging of breast tumors and microcalcifications
Journal of Engineering and Applied SciencePhotoacoustic imaging has established itself as a prominent medical imaging modality. However, its efficacy is limited by its shallow penetration depth.
Mohamed A. Oransa +2 more
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Journal of Low Frequency Noise, Vibration and Active ControlDue to the incurred damages to the combustors, large-amplitude self-sustained thermoacoustic oscillations are unwanted in many propulsion systems, such as liquid/solid rocket motors and aero-engines.
Kai Pang +4 more
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