Thermoacoustics is the interaction between temperature, density and pressure variations of acoustic waves. Thermoacoustic heat engines can readily be driven using solar energy or waste heat and they can be controlled using proportional control. They can use heat available at low temperatures which makes it ideal for heat recovery and low power applications. The components included in thermoacoustic engines are usually very simple compared to conventional engines. The device can easily be controlled and maintained.
Thermoacoustic effects can be observed when partly molten glass tubes are connected to glass vessels. Sometimes spontaneously a loud and monotone sound is produced. A similar effect is observed if one side of a stainless steel tube is at room temperature (293 K) and the other side is in contact with liquid helium at 4.2 K. In this case, spontaneous oscillations are observed which are named "Taconis oscillations".[1] The mathematical foundation of thermoacoustics is by Nikolaus Rott.[2][3] Later, the field was inspired by the work of John Wheatley[4] and Swift and his co-workers. Technologically thermoacoustic devices have the advantage that they have no moving parts, which makes them attractive for applications where reliability is of key importance.[5][6]
^K. W. Taconis, J. J. M. Beenakker, A. O. C. Nier, and L. T. Aldrich (1949) "Measurements concerning the vapour-liquid equilibrium of solutions of He3 in He4 below 2.19 K," Physica, 15 : 733-739.
^N. Rott, Damped and thermally driven acoustic oscillations in wide and narrow tubes, Zeitschrift für Angewandte Mathematik und Physik. 20:230 (1969).
^Rott, Nikolaus (1980). "Thermoacoustics". Advances in Applied Mechanics Volume 20. Advances in Applied Mechanics. Vol. 20. pp. 135–175. doi:10.1016/S0065-2156(08)70233-3. ISBN 9780120020201.
^Wheatley, John (1985). "Understanding some simple phenomena in thermoacoustics with applications to acoustical heat engines". American Journal of Physics. 53 (2): 147–162. Bibcode:1985AmJPh..53..147W. doi:10.1119/1.14100.
^Swift, G. W. (1988). "Thermoacoustic engines". The Journal of the Acoustical Society of America. 84 (4): 1145–1180. Bibcode:1988ASAJ...84.1145S. doi:10.1121/1.396617.
^Waele, A. T. A. M. (2011). "Basic Operation of Cryocoolers and Related Thermal Machines". Journal of Low Temperature Physics. 164 (5–6): 179–236. Bibcode:2011JLTP..164..179D. doi:10.1007/s10909-011-0373-x.
Thermoacoustics is the interaction between temperature, density and pressure variations of acoustic waves. Thermoacoustic heat engines can readily be...
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radio receivers used balanced armature drivers for their cones. The thermoacoustic effect generates sound from the audio frequency Joule heating of the...
reactors. Helium, mixed with a heavier gas such as xenon, is useful for thermoacoustic refrigeration due to the resulting high heat capacity ratio and low...
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follow a real Stirling cycle. These devices include the thermoacoustic engine and thermoacoustic refrigerator. High-amplitude acoustic standing waves cause...
standing-wave "engine" is presented in: Swift, Greg (2007). "Chapter 7: Thermoacoustics". In Rossing, Thomas (ed.). Springer Handbook of Acoustics. New York...
demonstrated a thermoacoustic loudspeaker (or thermophone) of carbon nanotube thin film, whose working mechanism is a thermoacoustic effect. Sound frequency...
}{\partial p \over p_{m}}} This fact is exploited within the field of thermoacoustics. The propagation speed, or acoustic velocity, of acoustic waves is...
Split-single Steam (reciprocating) Steam turbine Aeolipile Stirling Thermoacoustic Manson engine Beale number West number Timeline of heat engine technology...
early 1980s with a series of other innovations in the broader field of thermoacoustics. In contrast with other cryocoolers (e.g. Stirling cryocooler and GM-refrigerators)...
Split-single Steam (reciprocating) Steam turbine Aeolipile Stirling Thermoacoustic Manson engine Beale number West number Timeline of heat engine technology...
Split-single Steam (reciprocating) Steam turbine Aeolipile Stirling Thermoacoustic Manson engine Beale number West number Timeline of heat engine technology...
magnitude of the thermoacoustic instability is maximised. On the other hand, if the Rayleigh Index is negative, then thermoacoustic damping occurs. The...
Split-single Steam (reciprocating) Steam turbine Aeolipile Stirling Thermoacoustic Manson engine Beale number West number Timeline of heat engine technology...
avalanche photodiodes. The proposed acoustic detection of neutrinos via the thermoacoustic effect is the subject of dedicated studies done by the ANTARES, IceCube...
installed in the Danish town of Esbjerg in 2023. A thermoacoustic heat pump operates as a thermoacoustic heat engine without refrigerant but instead uses...
Swift, G. W. (27 July 2000). "The Huygens entrainment phenomenon and thermoacoustic engines". The Journal of the Acoustical Society of America. 108 (2):...
Split-single Steam (reciprocating) Steam turbine Aeolipile Stirling Thermoacoustic Manson engine Beale number West number Timeline of heat engine technology...
Split-single Steam (reciprocating) Steam turbine Aeolipile Stirling Thermoacoustic Manson engine Beale number West number Timeline of heat engine technology...
Split-single Steam (reciprocating) Steam turbine Aeolipile Stirling Thermoacoustic Manson engine Beale number West number Timeline of heat engine technology...
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