Results 21 to 30 of about 187,061 (298)

Determination of representative loading conditions for effective semitrailer design

open access: yesTransport, 2014
Obtaining a representative loading spectrum that corresponds well to the reality is still one of the greatest challenges for fatigue life calculations and optimal design of the trailer body.
Karel Kural   +3 more
doaj   +1 more source

Propulsion Performance of the Full-Active Flapping Foil in Time-Varying Freestream

open access: yesApplied Sciences, 2020
A numerical investigation of the propulsion performance and hydrodynamic characters of the full-active flapping foil under time-varying freestream is conducted. The finite volume method is used to calculate the unsteady Reynolds averaged Navier–Stokes by
Zhanfeng Qi   +4 more
doaj   +1 more source

Effects of Regular Waves on Propulsion Performance of Flexible Flapping Foil

open access: yesApplied Sciences, 2018
The objective of the present study is to analyze the effects of waves on the propulsive performance and flow field evolution of flexible flapping foil, and then offer a way to take advantage of wave energy.
Peng Liu   +4 more
doaj   +1 more source

Conceptual Design and Control Schedule Optimization for Parallel Hybrid Propulsion System of Regional Turboprop Aircraft [PDF]

open access: yesE3S Web of Conferences, 2023
Current environmental policies for the aviation industry motivate the use of cleaner propulsion systems to reduce its CO2 and noise footprint in the coming years.
Mikhailov Alexey   +5 more
doaj   +1 more source

Analysis of the Propulsion Performance and Internal Flow Field of an Underwater Launcher

open access: yesApplied Sciences, 2022
The gas-curtain launch is designed to address the shortcomings of conventional underwater launchers, such as poor dependability and low muzzle velocity. In this paper, the influence of jet structures on the propulsion performance and internal flow field ...
Xinwei Zhang, Yonggang Yu
doaj   +1 more source

Installed performance assessment of a boundary layer ingesting distributed propulsion system at design point [PDF]

open access: yes, 2016
Boundary layer ingesting systems have been proposed as a concept with great potential for reducing the fuel consumption of conventional propulsion systems and the overall drag of an aircraft.
Goldberg, Chana   +3 more
core   +1 more source

Study on the Hydrodynamic Performance of Typical Underwater Bionic Foils with Spanwise Flexibility

open access: yesApplied Sciences, 2017
Bionic foils are usually similar in shape to the locomotive organs of animals living in fluid media, which is helpful in the analysis of the motion mode and hydrodynamic mechanisms of biological prototypes.
Kai Zhou, Junkao Liu, Weishan Chen
doaj   +1 more source

Experimental study of controlling tip clearance flow in a pump-jet propulsor

open access: yesZhongguo Jianchuan Yanjiu, 2023
ObjectiveThis paper aims to suppress the adverse effects of tip clearance flow on the hydrodynamic performance and unsteady excitation force of a pump-jet propulsor. MethodAs for the pre-swirl stator pump-jet propulsor, an annular flexible seal structure
Ruilin HAN   +5 more
doaj   +1 more source

Propulsion Rig: A multirotor performance measurement test platform [PDF]

open access: yesMATEC Web of Conferences
Off-the-shelf multirotor propulsion system components can produce uncertain static and dynamic performance. Commercially, solutions exist to characterise the inexact performance of the propulsion system, yet they are prohibitively expensive. To that end,
Hasewinkel Guy, Pretorius Arnold
doaj   +1 more source

Analysis of Key Technologies for New Green Marine Propulsion Systems [PDF]

open access: yesE3S Web of Conferences, 2020
The new green Marine propulsion system, as a new generation of marine propulsion, has advantages of strong mobility, low fuel consumption, low noise, safety and comfort.
Duan Zheng   +3 more
doaj   +1 more source

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