Results 11 to 20 of about 100,607 (267)

Study of acoustic and aerodynamic performance of reactive silencer with different configurations: Theoretical, modeling and experimental

Heliyon, 2023
Periodic sound reduction at some frequencies and high pressure loss could be considered as the disadvantages of simple expansion silencers. Generally, reactive elements are applied in silencers to optimize their acoustic and aerodynamic performance.
Motaleb Rahimi Jokandan, Ali safari variani, Saeid Ahmadi   +2 more
doaj   +1 more source

Rarefied, superorbital flows in an expansion tube [PDF]

International Journal of Numerical Methods for Heat & Fluid Flow, 2004
A free-piston driven expansion tube [X1 at the Centre for Hypersonics, University of Queensland] and its instrumentation is described. The facility was used to generate rarefied flows at speeds of approximately 10 km/s. Although the flow in the tube itself was in the continuum regime, rarefied flow conditions were achieved by allowing the flow at the ...
Wheatley, V., Chiu, S., Jacobs, P., Macrossan, M., Mee, D., Morgan, R.   +5 more
openaire   +3 more sources

Analysis of nitinol actuator response under controlled conductive heating regimes

Results in Engineering, 2023
In the last few decades, Nitinol (NiTi) actuators have created a massive impact at the commercial level due to their application in various engineering and medical fields.
Lehar Asip Khan, Eanna McCarthy, Corné Muilwijk, Inam Ul Ahad, Dermot Brabazon   +4 more
doaj   +1 more source

Crystals of superconducting Baryonic tubes in the low energy limit of QCD at finite density

European Physical Journal C: Particles and Fields, 2020
The low energy limit of QCD admits (crystals of) superconducting Baryonic tubes at finite density. We begin with the Maxwell-gauged Skyrme model in (3 + 1)-dimensions (which is the low energy limit of QCD in the leading order of the large N expansion ...
Fabrizio Canfora, Marcela Lagos, Aldo Vera   +2 more
doaj   +1 more source

In-situ heat losses measurements of parabolic trough receiver tubes based on infrared camera and artificial intelligence

Environmental Challenges, 2023
Thermal problems occurring in glass cover, getters, vacuum, expansion bellows, and HTF lead to significant thermal losses due to convection-conduction, which accelerates the absorber degradation and implies replacing immediately these tubes.
Ayoub Oufadel, Massaab El Ydrissi, Aicha Alami Hassani, Hicham Ghennioui, Abdelattif Ghennioui, El Ghali bennouna, Abderrahmane El Amri, Farid Abdi   +7 more
doaj   +1 more source

Characterization of Mg–9Al–1Zn-0.2Mn alloy tubes processed by a new modified tube cyclic expansion extrusion (M-TCEE) process

Journal of Materials Research and Technology, 2023
In this study, a new modified tube cyclic expansion extrusion process named M-TCEE was utilized for producing tubes with ultrafine grained (UFG) microstructure and improved properties.
Milad Aali Majidabad, Mohammad Eftekhari, Ghader Faraji   +2 more
doaj   +1 more source

The Role of the Process and Design Variables in Improving the Performance of Heat Exchanger Tube Expansion

Applied Sciences, 2018
In the expansion process of a fin-tube heat exchanger, the process variables and shape of the expansion ball affect the deformation of the tube’s inner grooves, the adhesion, and the expansion force.
Changwan Han, Inchul Sin, Hyerin Kwon, Seonghun Park   +3 more
doaj   +1 more source

Assessment of Oxygen Expansion during Internal Bleaching with Enamel and Dentin: A Comparative In Vitro Study

Dentistry Journal, 2021
Internal bleaching is a conservative, non-invasive, and simple treatment that is frequently performed in daily clinical practice. The present in vitro study analyzes the oxygen expansion of different bleaching agents resulting from the oxidation reaction
Alba Pallarés-Serrano, Sandra Pallarés-Serrano, Antonio Pallarés-Serrano, Antonio Pallarés-Sabater   +3 more
doaj   +1 more source

Focal Serous Tubal Intra-Epithelial Carcinoma Lesions Are Associated With Global Changes in the Fallopian Tube Epithelia and Stroma

Frontiers in Oncology, 2022
ObjectiveSerous tubal intra-epithelial carcinoma (STIC) lesions are thought to be precursors to high-grade serous ovarian cancer (HGSOC), but HGSOC is not always accompanied by STIC.
Jingni Wu, Yael Raz, Maria Sol Recouvreux, Márcio Augusto Diniz, Jenny Lester, Beth Y. Karlan, Beth Y. Karlan, Ann E. Walts, Arkadiusz Gertych, Arkadiusz Gertych, Arkadiusz Gertych, Sandra Orsulic, Sandra Orsulic, Sandra Orsulic   +13 more
doaj   +1 more source

Expansion of oval tubes: prediction and experiment [PDF]

ESAFORM 2021, 2021
The manufacturing of oval tubes for automotive components from sheets consists of several steps, from the flat sheet to a tube with expanded ends. It involves roll-bending of tubes, welding and several expansion processes with segmented tools. Forming steps in this process are subject to springback after the release of tools. Finite-element-simulations
Markus Stennei, Francisco Tadeu, Manfred Stiglmair, Deniz Kaya, Hamad ul Hassan, Florian Gutknecht, Till Clausmeyer   +6 more
openaire   +1 more source