Results 61 to 70 of about 1,128 (182)

Thermoacoustic Modeling of Cryogenic Hydrogen

Energies
Future thermoacoustic cryocoolers employing hydrogen as a working fluid can reduce reliance on helium and improve hydrogen liquefaction processes. Traditional thermoacoustic modeling methods often assume ideal-gas thermophysical properties and neglect ...
Konstantin I. Matveev, Jacob W. Leachman
doaj   +1 more source

On the Frequency Response of Nanostructured Thermoacoustic Loudspeakers

Nanomaterials, 2018
In this work, we investigate the thermal and acoustic frequency responses of nanostructured thermoacoustic loudspeakers. An opposite frequency dependence of thermal and acoustic responses was found independently of the device substrate (Kapton and glass)
Paolo La Torraca, Marco Bobinger, Maurizio Servadio, Paolo Pavan, Markus Becherer, Paolo Lugli, Luca Larcher   +6 more
doaj   +1 more source

Experimental Performance Evaluation of a Thermoacoustic Stirling Engine with a Low-Cost Arduino-Based Acquisition System

Applied Sciences
Existing thermoacoustic dynamic measurement instrumentation is typically expensive and relies on proprietary designs, sensors, and acquisition equipment.
Carmen Iniesta, Jordi Vinolas, Federico Prieto, Jose Luis Olazagoitia, Luis Soliverdi   +4 more
doaj   +1 more source

Electromagnetic–Acoustic Sensing for Biomedical Applications

Sensors, 2018
This paper reviews the theories and applications of electromagnetic–acoustic (EMA) techniques (covering light-induced photoacoustic, microwave-induced thermoacoustic, magnetic-modulated thermoacoustic, and X-ray-induced thermoacoustic) belonging to
Siyu Liu, Ruochong Zhang, Zesheng Zheng, Yuanjin Zheng   +3 more
doaj   +1 more source

Triggering in Thermoacoustics

International Journal of Spray and Combustion Dynamics, 2012
Under certain conditions, the flow in a combustion chamber can sustain large amplitude oscillations even when its steady state is linearly stable. Experimental studies show that these large oscillations can sometimes be triggered by very low levels of background noise. This theoretical paper sets out the conditions that are necessary for triggering to
openaire   +1 more source

Frequency dependence of microwave thermo-acoustic imaging of breast tumors and microcalcifications

Journal of Engineering and Applied Science
Photoacoustic imaging has established itself as a prominent medical imaging modality. However, its efficacy is limited by its shallow penetration depth.
Mohamed A. Oransa, Nihal Y. Ibrahim, Noha M. Salem   +2 more
doaj   +1 more source

Investigation on the stability of the Rijke-type thermoacoustic system with an axially distributed heat source

Journal of Low Frequency Noise, Vibration and Active Control
Due to the incurred damages to the combustors, large-amplitude self-sustained thermoacoustic oscillations are unwanted in many propulsion systems, such as liquid/solid rocket motors and aero-engines.
Kai Pang, Yuanhao Wang, Xinyan Li, Hongquan Sun, Chenzhen Ji   +4 more
doaj   +1 more source

Advances and Challenges in Thermoacoustic Network Modeling for Hydrogen and Ammonia Combustors

Energies
The transition to low-carbon energy systems has heightened interest in hydrogen and ammonia as sustainable alternatives to traditional hydrocarbon fuels.
Seungmin Guk, Jaehoon Lee, Juwon Kim, Minwoo Lee   +3 more
doaj   +1 more source

PENGARUH PANJANG STACK SELUBUNG KABEL TERHADAP PERUBAHAN SUHU PADA SISTEM PENDINGIN TERMOAKUSTIK

Spektra: Jurnal Fisika dan Aplikasinya, 2017
Research on environmentally friendly thermo-acoustic coolants uses a heat exchanger from the cable sheath material. The resonator tube used in the thermoelectric cooler is a 5.25 cm diameter PVC (polyvinyl chloride) tube with a length of 87 cm ...
Indah Kharismawati, Hanif Rafika Putri
doaj   +1 more source

Boundaries of thermoacoustic instability in the thermoacoustic engine with cryogenic cooling [PDF]

Journal International Academy of Refrigeration, 2020
E.A. Zinoviev, G.V. Vorotnikov, A.I. Dovgyallo, S.O. Nekrasova   +3 more
openaire   +1 more source