Results 171 to 180 of about 2,806 (227)
Some of the next articles are maybe not open access.
Working gases in thermoacoustic engines
The Journal of the Acoustical Society of America, 1999The best working gases for thermoacoustic refrigeration have high ratios of specific heats and low Prandtl numbers. These properties can be optimized by the use of a mixture of light and heavy noble gases. In this paper it is shown that light noble gas–heavy polyatomic gas mixtures can result in useful working gases.
J R, Belcher +4 more
openaire +2 more sources
Non-linear phenomena in thermoacoustic engines
Journal of Non-Equilibrium Thermodynamics, 2004zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Rivera-Alvarez, Alejandro, Chejne, Farid
openaire +2 more sources
A Thermoacoustic Engine Design
Volume 2: 31st Computers and Information in Engineering Conference, Parts A and B, 2011This paper discusses basic standing wave theory as it relates to thermoacoustics as well as the design, construction, and testing of a simple thermoacoustic engine based upon these principles. This paper covers the design, construction, and testing of a proof-of-concept engine to demonstrate the possibility of converting heat energy into mechanical ...
Evan Wind +4 more
openaire +1 more source
The Journal of the Acoustical Society of America, 1988
Thermoacoustic engines, or acoustic heat engines, are energy-conversion devices that achieve simplicity and concomitant reliability by use of acoustic technology. Their efficiency can be a substantial fraction of Carnot’s efficiency. In thermoacoustic prime movers, heat flow from a high-temperature source to a low-temperature sink generates acoustic ...
openaire +1 more source
Thermoacoustic engines, or acoustic heat engines, are energy-conversion devices that achieve simplicity and concomitant reliability by use of acoustic technology. Their efficiency can be a substantial fraction of Carnot’s efficiency. In thermoacoustic prime movers, heat flow from a high-temperature source to a low-temperature sink generates acoustic ...
openaire +1 more source
Liquid-sodium thermoacoustic engine
Applied Physics Letters, 1988We have constructed a thermoacoustic engine that uses liquid sodium as its working substance. The engine generates acoustic power using heat flowing from a high-temperature source to a low-temperature sink. The measured performance of this engine disagrees significantly with numerical calculations based on our theory of thermoacoustic engines.
A. Migliori, G. W. Swift
openaire +1 more source
Streaming in thermoacoustic engines
The Journal of the Acoustical Society of America, 1999Thermoacoustics utilizes an acoustic process to transport heat. Interestingly enough, sound sources that move essentially in a sinusoidal manner often do not yield flow fields of a sinusoidal nature. In addition to the oscillation of each fluid element contributing to the acoustic system, there can exist a pattern of steady vortices or other time ...
Gordon Smith, Richard Raspet, Henry Bass
openaire +1 more source
A loaded thermoacoustic engine
The Journal of the Acoustical Society of America, 1995Measurements and analysis of the performance of a thermoacoustic engine driving a dissipative load are presented. The effect of the load can be explained qualitatively using a simple low-amplitude approximation and quantitatively by invoking a more accurate low-amplitude numerical solution. The heater power Q̇ and hot-end temperature TH are found to be
J. R. Olson, G. W. Swift
openaire +1 more source
Unconventional thermoacoustic heat engines
The Journal of the Acoustical Society of America, 2006During 1988 to 1994, John Strachen and Harold Aspden demonstrated an all-solid-state thermoelastic cooler which was 0.5 cm thick and a few centimeters in length. With 7.2 V dc applied across the device, it drew 6.3 W of electrical power and produced 13.7 W of cooling power with a 20<th>°C temperature drop.
Matthew G. Hilt +6 more
openaire +1 more source
Annular thermoacoustic engines
AIP Conference Proceedings, 2000The goal of this paper is to describe some of the properties of single- and dual-stack annular thermoacoustic engines. It is explained that the single-stack configuration is not well suited for operation under parameters typical of standing-wave thermoacoustics.
openaire +1 more source
Thermoacoustic engines and refrigerators
AIP Conference Proceedings, 2012Thermoacoustic engines and refrigerators use gas inertia and compressibility to eliminate many of the mechanical contrivances required by traditional engines and refrigerators while providing potentially attractive options that might reduce environmental impacts.
openaire +1 more source