Numerical investigation of a looped-tube traveling-wave thermoacoustic generator with a bypass pipe

Al-Kayiem, Ali; Yu, Zhibin

doi:10.1016/j.egypro.2017.12.595

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…It was thereby possible to approximate probes with a coefficient of determination greater than 95% (R 2 > 0.95). Second-order oscillating elements were estimated using equation (1) and the Curve Fitting Tool, with custom equation settings and default 95% confidence bounds:…”

Section: Experimental Test Rigmentioning

confidence: 99%

“…Pulsations and resonance in pipelines cause problems in a wide range of industrial applications, from process engineering to automobiles, including the latest thermoacoustic engines [1] and new metamaterials [2,3]. The difficulty of identifying resonance in pipes with pulsating flow is due to the nonstationary and periodic nature of the supply, which is provided by reciprocating compressors [4] or receivers such as pumps or periodically working units.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Investigations of Pipeline with Resonator

Pałczyński

Kantyka

2019

Mechanics and Mechanical Engineering

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This article presents the current state of the art regarding the use resonators in straight pipes. There is considerable need to control and reduce pressure pulsation in pipelines supplied with pulsating flows. The use of a Helmholz resonator introduces an additional degree of freedom to the analysed dynamic system. Building on previous experimental investigations by the authors, which identified the nonlinear properties of straight pipes supplied with pulsating flows, this study describes an experimental test rig, measurement methods and mechanical analogies for one (1DOF) and two (2DOF) degrees of freedom. The results are presented in the form of a 3D map of amplitude-frequency characteristics, as a function of the resonator volume determined by piston height. The dynamic properties of the described system are presented as amplitude-phase characteristics, based on a comparison of the numerical and experimental results.

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Section: Experimental Test Rigmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations of Pipeline with Resonator

Pałczyński

Kantyka

2019

Mechanics and Mechanical Engineering

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“…14) In this study, to design a traveling wave thermoacoustic system with a dry stack, we treat the heat exchange cycle as a Stirling cycle. The feedback loop type [15][16][17][18] with a sub-loop attached to the loop tube and the double-loop type 3,19) with two loop tubes connected generate a high acoustic power and a lowtemperature drive by appropriately adjusting the phase in terms of the system's shape. De Blok 5,6) developed a traveling wave feedback thermoacoustic generator that enhances the acoustic power owing to its low acoustic loss and low-temperature drive by connecting multiple stages of the prime movers.…”

Section: Introductionmentioning

confidence: 99%

An approach to low-temperature oscillation and high efficiency of thermoacoustic prime mover: influence of end face and reduction area of phase adjuster

Matsumoto¹,

Sakamoto²

2023

Jpn. J. Appl. Phys.

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Phase Adjuster (PA) has contributed to the reduction of the onset temperature and improvement of the energy conversion efficiency of thermoacoustic systems. In this study, we investigated the performance characteristics of thin medal-shaped PAs representing the PA end faces. The results show that inserting 2 mm thick medal-shaped PAs lowered the onset temperature by 220 K. However, insertion of thicker medal-shaped PAs maintained the onset temperature. In contrast, the energy conversion efficiency increased with the medal-shaped PA thickness. The energy conversion efficiency for 2 mm thick PAs was lower than that without PA. In addition, the thinner the medal-shaped PAs, the lower the power required for oscillation but the lower the energy conversion efficiency. These effects of the medal-shaped PA thickness indicate the necessity of different design guidelines for designing PAs for low-temperature oscillation and high efficiency in thermoacoustic systems.

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Justifying performance of thermo-acoustic Stirling engines based on a novel lumped mechanical model

Tavakolpour-Saleh

Zare

2021

Energy

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Numerical investigation of a looped-tube traveling-wave thermoacoustic generator with a bypass pipe

Cited by 5 publications

References 9 publications

Experimental and Numerical Investigations of Pipeline with Resonator

Experimental and Numerical Investigations of Pipeline with Resonator

An approach to low-temperature oscillation and high efficiency of thermoacoustic prime mover: influence of end face and reduction area of phase adjuster

Justifying performance of thermo-acoustic Stirling engines based on a novel lumped mechanical model

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