Results 61 to 70 of about 11,483,688 (354)
VESSEL MAIN PROPULSION ENGINE PERFORMANCE EVALUATION [PDF]
Journal of KONES. Powertrain and Transport, 2015 In general, the performance of a ship in service is different from that obtained on shipyard sea trial. Apart from any differences due to loading conditions, and for which due correction should be made, these differences arise principally from the weather, fouling and surface deterioration of the hull and propeller.
Tadeusz Borkowski +2 more
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Advanced Engineering Materials, EarlyView.Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat +6 more
wiley +1 more source
Computational Analysis of KCS Model with an Equalizing Duct
한국해양공학회지, 2021 In order to minimize carbon emissions and greenhouse gas, the Energy Efficiency Design Index (EEDI) has become a major factor to be considered in recent years in a ship’s design and operation phases.
Joseph Mwangi Ng’aru +2 more
doaj +1 more source
Boundary layer control for airships [PDF]
, 1975 An investigation is summarized of the aerodynamic principle of boundary layer control for nonrigid LTA craft. The project included a wind tunnel test on a BLC body of revolution at zero angle of attack.
Pake, F. A., Pipitone, S. J.
core +1 more source
A realistic quasi-physical model of the 100 metre dash [PDF]
, 2000 A quasi-physical model (having both physical and mathematical roots) of sprint performances is presented, accounting for the influence of drag modification via wind and altitude variations.
Mureika, J. R.
core +3 more sources
Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading
Advanced Engineering Materials, EarlyView.The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley +1 more source
AerospaceThe electric vertical take-off and landing (eVTOL) aircraft offers the advantages of vertical take-off and landing, environmental cleanliness, and automated control, making it a crucial component of future urban air traffic.
Junjie Wang +3 more
doaj +1 more source
NUMERICAL STUDY ON PROPULSIVE FACTORS IN REGULAR HEAD AND OBLIQUE WAVES
Brodogradnja, 2022 This paper applies Reynolds-averaged Navier-Stokes (RANS) method to study propulsion performance in head and oblique waves. Finite volume method (FVM) is employed to discretize the governing equations and SST k-ω model is used for modeling the turbulent ...
Kun Dai +5 more
doaj +1 more source
Scaling laws for the propulsive performance of three-dimensional pitching propulsors [PDF]
Journal of Fluid Mechanics, 2018 Scaling laws for the thrust production and energetics of self-propelled or fixed-velocity three-dimensional rigid propulsors undergoing pitching motions are presented.
F. Ayancik +5 more
semanticscholar +1 more source
On the performance of electrohydrodynamic propulsion [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2013 Partially ionized fluids can gain net momentum under an electric field, as charged particles undergo momentum-transfer collisions with neutral molecules in a phenomenon termed an ionic wind. Electrohydrodynamic (EHD) thrusters generate thrust by using two or more electrodes to ionize the ambient fluid and create an electric field.
Kento Masuyama, Steven R. H. Barrett
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