Results 1 to 10 of about 99,178 (137)

Evaluation Analysis on Leakage Performance for Beam Seal With Two Sealing Areas

open access: yesIEEE Access, 2022
As a special type of aviation hydraulic pipe joint, a beam seal comprises two annular sealing areas. This paper presented a leakage model for an annular sealing area based on a developed three-dimensional percolation grid model and the porous medium ...
Yingjia Yu   +4 more
doaj   +4 more sources

Contact mechanical behaviors of radial metal seal for the interval control valve in intelligent well: Modeling and theoretical study

open access: yesEnergy Science & Engineering, 2020
Intelligent wells equipped with the interval control valve (ICV), which have the potential applications to significantly improve oil production or control the water production of wells and fields, are more and more widely utilized in the oilfields.
Yiwei Yang   +7 more
doaj   +2 more sources

Contact Force Analysis of a Rotor-Brush Seal System With Eccentricity and Airflow

open access: yesIEEE Access, 2019
The mechanics properties of brush seals are usually very complicated. Here, the contact force of a rotor-brush seal system was analyzed based on the bending deformation theory considering the interaction of eccentricity and flow induced force.
Yuan Wei, Zhaobo Chen, Shulin Liu
doaj   +3 more sources

SEALING PERFORMANCE ANALYSIS AND STRUCTURAL OPTIMIZATION DESIGN OF NEW BEAM SEAL

open access: yesJixie qiangdu, 2023
In order to improve the sealing performance of the beam seal, the structural parameters of the beam seal were used as design variables, and the optimization design was carried out.
YAN GuoHua, REN XinJiang, LIU Yong
doaj   +1 more source

Nonlinear Modeling and Vibration Response Analysis of a Dual-Rotor System with an Inter-Shaft Graphite Seal

open access: yesMathematics
The inter-shaft graphite seal is a common structure in the dual-rotor system, and may generate nonlinear lateral excitation when there is large relative angular motion at the seal position.
Sen Xiao   +5 more
doaj   +3 more sources

Quality of Endodontic Treatment and Prevalence of Apical Radiolucencies in a Bulgarian Subpopulation: a CBCT Analysis [PDF]

open access: yesFolia Medica, 2021
Introduction: The advent of Cone Beam Computed Tomography (CBCT) in endodontics has enhanced the diagnosis of periapical radiolucencies and the assessment of endodontically treated teeth. Aim: The purpose of this study was to assess the ...
Teodora Karteva   +6 more
doaj   +3 more sources

Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf

open access: yesCommunications Earth & Environment, 2023
Poor coverage of the Antarctic continental shelf bathymetry impedes understanding the oceanographic processes affecting Antarctica’s role in global climate.
Clive R. McMahon   +9 more
doaj   +1 more source

Design and Preparation Methods of Metallic/Ceramic Barrier Layer for Titanium - Fire Retardant [PDF]

open access: yesCailiao Baohu, 2021
The metallic/ceramic barrier layer could be used not only for the titanium - fire retardant abradable seal coatings to play the role of fire - retardant, but also as the thermal barrier coatings for hot - section components in aero - engines.
LI Jia - hui, LIU Mei - jun
doaj   +1 more source

Evaluation of Ion Beam Behavior in 50 W Class RF Ion Thruster

open access: yesInternational Journal of Aerospace Engineering, 2021
Phenomenological behavior of ion beam acceleration through the grid system in 50 W class RF ion thruster has been investigated using PIC simulation and evaluated by experimental test using Faraday probe.
Huong T. T. Nguyen   +2 more
doaj   +1 more source

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