Results 11 to 20 of about 219 (182)
International Journal of Thermofluids, 2023 Performance of thermoacoustic (TA) systems are very complex, and their performance optimization is a difficult task, and most TA systems have relatively very low efficiencies.
Karim Mazaheri, Mahyar Fazli
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Introduction to thermoacoustic Stirling engines: First steps and praxis [PDF]
E3S Web of Conferences, 2021 The work focuses on the theoretical study and design of Thermoacoustic Stirling-Like Cycle Engines. One of the main goals of this study is to describe the application of a methodology for energy analysis and optimization of thermoacoustic devices.
Iniesta Carmen +4 more
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Thermodynamic cycle of the traveling wave thermoacoustic engine
Case Studies in Thermal Engineering, 2022 The paper presents a new numerical solution as a method for the thermodynamic cycle of a thermoacoustic engine estimation. A mathematical solution for calculating the gas averaged velocity was developed. The proposed method uses acoustic impedance of the
G.V. Vorotnikov +2 more
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Demonstration of flywheel-based travelling-wave thermoacoustic engine [PDF]
E3S Web of Conferences, 2021 We report test results on a thermoacoustic engine having a piston-crank-flywheel assembly. The engine maintained steady rotation states when the heating temperature was increased more than 114°C.
Watanabe Takumaru +3 more
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Measurements of the impedance matrix of a thermoacoustic core: Applications to the design of thermoacoustic engines [PDF]
The Journal of the Acoustical Society of America, 2013 The successful design of a thermoacoustic engine depends on the appropriate description of the processes involved inside the thermoacoustic core (TAC). This is a difficult task when considering the complexity of both the heat transfer phenomena and the geometry of the porous material wherein the thermoacoustic amplification process occurs.
Bannwart, Flavio +3 more
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Standing-wave thermoacoustic engines
EPJ Web of Conferences, 2012 The aim of this study is mainly devoted to explain a thermoacoustic effect. We explore the basic principles of thermoacoustic engines and primarily we focus on a quarter-wavelength closed-open thermoacoustic engine as a prime mover, where temperature ...
Vestfálová Magda +3 more
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Optimization of a Thermoacoustic Engine with a Complex Heat Transfer Exponent
Entropy, 2003 : Heat transfer between a thermoacoustic engine and its surrounding heat reservoirs can be out of phase with oscillating working gas temperature. The paper presents a generalized heat transfer model using a complex heat transfer exponent.
Lingen Chen +4 more
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Thermoacoustic Engines and Refrigerators [PDF]
Physics Today, 1995 We ordinarily think of a sound wave in a gas as consisting of coupled pressure and displacement oscillations. However, temperature oscillations always accompany the pressure changes. The combination of all these oscillations, and their interaction with solid boundaries, produces a rich variety of “thermoacoustic” effects. Although these effects as they
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Abrupt reduction of the critical temperature difference of a thermoacoustic engine by adding water
AIP Advances, 2015 The critical temperature difference (ΔTcri) that causes a thermoacoustic spontaneous oscillation is reduced by the presence of water in the working fluid of a thermoacoustic engine.
K. Tsuda, Y. Ueda
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Numerical simulation of stages number influence to the characteristics of a looped tube thermoacoustic Stirling engine [PDF]
Известия Саратовского университета. Новая серия: Физика, 2021 Background and Objectives: The traveling wave thermoacoustic engine is a variation of the Stirling engine family. With an increase in the number of stages of a traveling wave thermoacoustic engine from one to four, an improvement in the characteristics ...
Gorshkov, Ilya Borisovich +1 more
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