Results 21 to 30 of about 130,331 (289)

HORIZONTAL AXIS MARINE CURRENT TURBINE DESIGN FOR WIND-ELECTRIC HYBRID SAILING BOAT

open access: yesBrodogradnja, 2017
In recent decades, the number of theoretical studies and applications on electric power production from renewable sources such as wind, solar, sea and tidal flows, has been increasing rapidly.
Serkan Ekinci, Mustafa Alvar
doaj   +1 more source

Simulation of the Battery Pack Exploitation Based on Real Measurement Data of Applied Chemical Cells

open access: yesMATEC Web of Conferences, 2016
Authors of following article present the method of battery work simulation based on real measurement data of applied chemical cells and workload data. Description of method as its assumptions are presented.
Koniak Marcin   +3 more
doaj   +1 more source

Quadrocopter propeller specifications

open access: yesАвіаційно-космічна техніка та технологія, 2023
The subject of the study is the characteristics of the quadrocopter propeller. The object of the study is a two-blade propeller of a quadrocopter. The aim of this study was to evaluate the efficiency, acoustic characteristics of the propeller of a ...
Kateryna Balalaieva   +3 more
doaj   +1 more source

Research on Optimization of Parametric Propeller Based on Anti-Icing Performance and Simulation of Cutting State of Ice Propeller

open access: yesJournal of Marine Science and Engineering, 2021
When a ship sails in an ice area, the ice could cause damage to ship hull and the propeller as well as the rudder. In the design process of an ice class propeller, the strength verification of the propeller has always been the focus of the design and ...
Yu Lu   +5 more
doaj   +1 more source

Formation of a Propeller Structure by a Moonlet in a Dense Planetary Ring

open access: yes, 2011
The Cassini spacecraft discovered a propeller-shaped structure in Saturn's A ring. This propeller structure is thought to be formed by gravitational scattering of ring particles by an unseen embedded moonlet.
Daisaka   +7 more
core   +1 more source

An Investigation of the Aerodynamic Performance for a Fuel Saving Double Channel Wing Configuration

open access: yesEnergies, 2019
This paper presents a fuel saving double channel wing (FADCW) configuration for a propeller driven aircraft to reduce fuel consumption. In pursuit of this objective, FADCW configuration combines the tractor propeller layout and over-the-wing propeller ...
Hongbo Wang, Wenbiao Gan, Daochun Li
doaj   +1 more source

An analysis of low-frequency propeller vibration and sound radiation characteristics: The Jellyfish effect

open access: yesZhongguo Jianchuan Yanjiu, 2020
Objectives Arousing the "Jellyfish mode" of a propeller can lead to strong low-frequency, narrow band sound radiation. On this basis, the second sound radiation mechanism of the "Jellyfish mode" has been investigated.
WU Chongjian   +4 more
doaj   +1 more source

The analysis of a propeller's low-frequency vibration and sound radiation characteristics: Jellyfish mode

open access: yesZhongguo Jianchuan Yanjiu, 2020
[Objectives] We found a new component of propeller noises which is induced by the excitation of the low-frequency elastic mode of the propeller. In particular,the model where all the blades of a propeller vibrate in the same phase is stimulated will ...
WU Chongjian   +4 more
doaj   +1 more source

Propeller aeroacoustic methodologies [PDF]

open access: yes, 1980
The aspects related to propeller performance by means of a review of propeller methodologies are addressed. Preliminary wind tunnel propeller performance data are presented and the predominent limitations of existing propeller performance methodologies ...
Gregorek, G. M., Korkan, K. D.
core   +1 more source

Determination of the hydrodynamic performance of marine propellers using fibre Bragg gratings [PDF]

open access: yes, 2019
Downloading of the abstract is permitted for personal use only. A critical aspect in the design of marine propellers is their hydrodynamic performance which, when evaluated experimentally, requires a number of parameters to be monitored at the same time,
Carlton, J.   +8 more
core   +1 more source

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