Stack Parameters Effect on the Performance of Anharmonic Resonator Thermoacoustic Heat Engine

Nouh, M.; Arafa, Nadim; Abdel‐Rahman, Ehab

doi:10.2478/meceng-2014-0006

Cited by 14 publications

(4 citation statements)

References 7 publications

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“…The thermal penetration depth is the distance surrounding the stack plate where thermoacoustic effects are present [4]. This finding was also supported by Nouh et al [15] where their numerical study concluded that the optimal stack spacing was 2.4δk.…”

Section: Introductionmentioning

confidence: 52%

Effect of Stack Position and Stack Length on the Performance of Thermoacoustic Engine

Masalmeh¹,

Ali²,

Islam³

et al. 2022

International Conference on Fluid Flow, Heat and Mass Transfer

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In this paper, the influence of the stack length and stack position on the performance of the thermoacoustic engine is numerically investigated. In the thermoacoustic engine (TAE), thermal energy is converted into acoustic energy which can be utilized for various applications. Here, two stack lengths and five stack positions are used to study their effect on the parameters of the developed acoustic wave. The two stack sizes are 5% and 15% of the length of the resonator tube, whereas the stack centre position is varied between 10% to 50% of the resonator length. The results are given in terms of the pressure, axial velocity, and frequency of the acoustic wave. These quantities are observed at three different locations in the resonator tube, i.e., sensor 1, 2, and 3. The results indicated that longer stack produced the sound wave with higher intensity and higher frequency as compared to the shorter stack. Moving the stack away from the closed end of the resonator increased the frequency of the wave, whereas the pressure and velocity increased until a maximum peak was reached, and then started to decrease.

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Section: Introductionmentioning

confidence: 52%

Effect of Stack Position and Stack Length on the Performance of Thermoacoustic Engine

Masalmeh¹,

Ali²,

Islam³

et al. 2022

International Conference on Fluid Flow, Heat and Mass Transfer

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“…For the standing-wave engine or refrigerator, Babaei and Siddiqui 50 apply parametric variation in their own thermoacoustic model to predict the optimum length of the engine and the position of the stack within it, from the point of view of the thermal efficiency or the coefficient of performance, respectively. In a similar analysis for standing-wave prime movers, Nouh et al 144 use calculations with DeltaE to determine the optimum stack position for a variable area resonator, the results being relatively insensitive to the stack length. With helium at 10 bar, the plate spacing for maximum efficiency was 2.4 times the thermal penetration depth in this case.…”

Section: Passive Control Of Engines Through Designmentioning

confidence: 99%

Common features in the thermoacoustics of flames and engines

Lawn

Pénelet

2017

International Journal of Spray and Combustion Dynamics

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Thermoacoustic phenomena generated inadvertently during combustion, and those produced by heating and cooling material to generate a temperature gradient, have mostly been studied independently. Indeed, researchers of one phenomenon are seldom familiar with the literature on the other. This paper seeks to remedy this by reviewing the two subjects alongside one another, by comparing and contrasting them where possible. There is a brief account of the historically important papers in the development of both subjects, followed by a description of the nature of the phenomena. A selective number of papers is called upon to illustrate these principles. Techniques for handling the pure acoustics in the two subjects are addressed, before an outline is given of the modelling of the two thermoacoustic systems. Non-linear phenomena in the two systems are then explored. Finally, methods of 'control', of changing the system characteristics, are briefly discussed.

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“…600W of heat source could produce 27W of acoustic power, as reported by Feldman on his PhD dissertation [4]. Investigations on the theory that could explain the phenomena, have been done by later researchers, to find a possible optimization and operations of the actual system [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Determination Performance of Thermoacoustic Heat Engine Simulation by Delta EC Software

Rahim

Zain²,

Asmuin

et al. 2015

KEM

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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.

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Stack Parameters Effect on the Performance of Anharmonic Resonator Thermoacoustic Heat Engine

Cited by 14 publications

References 7 publications

Effect of Stack Position and Stack Length on the Performance of Thermoacoustic Engine

Effect of Stack Position and Stack Length on the Performance of Thermoacoustic Engine

Common features in the thermoacoustics of flames and engines

Determination Performance of Thermoacoustic Heat Engine Simulation by Delta EC Software

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