Resonator Shape Effect on the Performance of a Standing-Wave Thermoacoustic Heat Engine

2011 ◽  
Author(s):  
Essam Khalil ◽  
Mahmoud Fouad ◽  
Mazen Eldeeb
Keyword(s):  
Standing Wave ◽  
Heat Engine ◽  
Shape Effect

Determination Performance of Thermoacoustic Heat Engine Simulation by Delta EC Software

2015 ◽  
Vol 660 ◽  
pp. 311-316 ◽  
Author(s):  
Irfan Abd Rahim ◽  
Mohd Zarhamdy Mohd Zain ◽  
Nor Zelawati Asmuin ◽  
Mohd Sazli Mohd Saad
Keyword(s):  
Standing Wave ◽  
Electronic Devices ◽  
Heat Engine ◽  
Electrical Energy ◽  
Acoustic Power ◽  
Maximum Pressure ◽  
Wave System ◽  
Pressure Amplitude ◽  
Structure Interaction ◽  
Engine Simulation

Thermoacoustic Heat Engine probably the most efficient energy source for electronic devices for the next 10 year ahead that require small amount of electrical energy to operate. This study was to simulate the Thermoacoustic Heat Engine (TAHE) standing wave system by conducting a Fluid Structure Interaction (FSI) by using a Thermoacoustic system’s software named DeltaEC for better uderstanding on the fundamental of TAHE standing wave system. Some characteristics or parameters in the system that were studied in order to derive the fundamental knowledge of TAHE standing wave system. The thickness of Hot Heat Exchangers (Hot HX) plays the major role in affecting the maximum acoustic power generated, the level of onset temperature difference and maximum pressure amplitude followed by the stack length. Hot HX dimension (thickness) contributes nearly 3.3% changes in maximum acoustic power where the lowest thickness scores the highest maximum acoustic power generated. 2.9% of increment on maximum acoustic power generated by altering the length of the stack by 5 mm.

scholarly journals Numerical study of transient characteristics of a standing-wave thermoacoustic heat engine

2022 ◽  
Vol 186 ◽  
pp. 122530
Author(s):  
Mohammad Ja'fari ◽  
Artur J. Jaworski ◽  
Antonio Piccolo ◽  
Kevin Simpson
Keyword(s):  
Standing Wave ◽  
Numerical Study ◽  
Heat Engine ◽  
Transient Characteristics

scholarly journals Investigation of a Portable Standing Wave Thermoacoustic Heat Engine

2013 ◽  
Vol 56 ◽  
pp. 829-834 ◽  
Author(s):  
M.G. Normah ◽  
A.R. Irfan ◽  
K.S. Koh ◽  
A. Manet ◽  
Ab.M. Zaki
Keyword(s):  
Standing Wave ◽  
Heat Engine

Study on energy conversion characteristics of a high frequency standing-wave thermoacoustic heat engine

2013 ◽  
Vol 111 ◽  
pp. 1147-1151 ◽  
Author(s):  
Guoyao Yu ◽  
Xiaotao Wang ◽  
Wei Dai ◽  
Ercang Luo
Keyword(s):  
Energy Conversion ◽  
Standing Wave ◽  
High Frequency ◽  
Heat Engine

Eels Under Standing Wave Conditions

1982 ◽  
Vol 40 ◽  
pp. 492-495
Author(s):  
O.L. Krivanek ◽  
J. TaftØ
Keyword(s):  
Standing Wave ◽  
Wave Conditions ◽  
Set Up ◽  
A Site ◽  
Complex Crystal

It is well known that a standing electron wavefield can be set up in a crystal such that its intensity peaks at the atomic sites or between the sites or in the case of more complex crystal, at one or another type of a site. The effect is usually referred to as channelling but this term is not entirely appropriate; by analogy with the more established particle channelling, electrons would have to be described as channelling either through the channels or through the channel walls, depending on the diffraction conditions.

Voltage and Orientation Dependence of Characteristic X-Ray Production in Thin Crystals

1985 ◽  
Vol 43 ◽  
pp. 414-415
Author(s):  
G. Thomas ◽  
K. M. Krishnan ◽  
Y. Yokota ◽  
H. Hashimoto
Keyword(s):  
Standing Wave ◽  
Incident Beam ◽  
Orientation Dependence ◽  
Incident Plane Wave ◽  
Crystalline Materials ◽  
X Ray ◽  
Incident Plane ◽  
Crystal Unit Cell ◽  
Beam Orientation ◽  
Acceleration Voltage

For crystalline materials, an incident plane wave of electrons under conditions of strong dynamical scattering sets up a standing wave within the crystal. The intensity modulations of this standing wave within the crystal unit cell are a function of the incident beam orientation and the acceleration voltage. As the scattering events (such as inner shell excitations) that lead to characteristic x-ray production are highly localized, the x-ray intensities in turn, are strongly determined by the orientation and the acceleration voltage. For a given acceleration voltage or wavelength of the incident wave, it has been shown that this orientation dependence of the characteristic x-ray emission, termed the “Borrmann effect”, can also be used as a probe for determining specific site occupations of elemental additions in single crystals.

3-D optical transfer in excitation field synthesis microscopes

1995 ◽  
Vol 53 ◽  
pp. 64-65
Author(s):  
Vijay Krishnamurthi ◽  
Brent Bailey ◽  
Frederick Lanni
Keyword(s):  
Standing Wave ◽  
Spatial Information ◽  
3D Structure ◽  
Complete Recovery ◽  
Weighting Factor ◽  
Optical Transfer Function ◽  
Excitation Field ◽  
Optical Transfer ◽  
Set Up ◽  
Focus Plane

Excitation field synthesis (EFS) refers to the use of an interference optical system in a direct-imaging microscope to improve 3D resolution by axially-selective excitation of fluorescence within a specimen. The excitation field can be thought of as a weighting factor for the point-spread function (PSF) of the microscope, so that the optical transfer function (OTF) gets expanded by convolution with the Fourier transform of the field intensity. The simplest EFS system is the standing-wave fluorescence microscope, in which an axially-periodic excitation field is set up through the specimen by interference of a pair of collimated, coherent, s-polarized beams that enter the specimen from opposite sides at matching angles. In this case, spatial information about the object is recovered in the central OTF passband, plus two symmetric, axially-shifted sidebands. Gaps between these bands represent "lost" information about the 3D structure of the object. Because the sideband shift is equal to the spatial frequency of the standing-wave (SW) field, more complete recovery of information is possible by superposition of fields having different periods. When all of the fields have an antinode at a common plane (set to be coincident with the in-focus plane), the "synthesized" field is peaked in a narrow infocus zone.

Standing wave diffraction with a beam of slow atoms

1997 ◽  
Vol 44 (10) ◽  
pp. 1863-1882 ◽  
Author(s):  
S. KUNZE , S. DURR, K. DIECKMANN , M.
Keyword(s):  
Standing Wave ◽  
Wave Diffraction
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