Results 41 to 50 of about 491,279 (390)
, 2023 “Surface propulsion”means that the aircraft uses its surface of the shell to propel air. Due to the large surface area of the aircraft shell, aircraft using surface propulsion is equivalent to having a huge jet area. The huge surface area of the outer shell allows the aircraft to use a smaller airflow velocity to drive a large flow of gas, achieving ...
openaire +1 more source
Displaced geostationary orbit design using hybrid sail propulsion [PDF]
, 2011 Because of an increase in the number of geostationary spacecraft and the limits imposed by east–west spacing requirements, the geostationary orbit is becoming congested. To increase its capacity, this paper proposes to create new geostationary slots by
Becerra V. M. +14 more
core +1 more source
Numerical Study on Fluid Dynamic Characteristics of a Cross-Flow Fan
Journal of Marine Science and Engineering, 2023 This paper focuses on the application of a cross-flow fan (CFF) to generate propulsion for a submersible aircraft with a flying wing configuration. A numerical method is established to simulate the CFF operating both in the air and underwater. This paper
Xiaowei Cai, Chun Zhang, Baoshou Wang
doaj +1 more source
The Role of the Double-Layer Potential in Regularised Stokeslet Models of Self-Propulsion
Fluids, 2021 The method of regularised stokeslets is widely used to model microscale biological propulsion. The method is usually implemented with only the single-layer potential, the double-layer potential being neglected, despite this formulation often not being ...
David J. Smith +3 more
doaj +1 more source
Propulsive Capability of an Asymmetric GDM Propulsion System [PDF]
42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006 *† The role of the ambipolar potential in the propulsive capability of the Gasdynamic Mirror (GDM) has been studied previously. The electrostatic potential arises as a result of the initial rapid escape of the electrons due to their small mass, leaving behind an excess of ions and creating a positive electric potential that slows down the electron ...
Kammash, Terry B., Tang, Ricky
openaire +2 more sources
Introduction to "To the Question of Energy Use of Detonation Combustion" by Ya. B. Zel'dovich [PDF]
, 2006 Ya. B. Zel’dovich (1914–1987) made numerous contributions [1] to the theory of detonation, beginning with his very well known and widely translated article [2] on detonation structure that first introduced the standard Zel’dovich-von Neumann-Döring (ZND)
Shepherd, J. E., Wintenberger, E.
core +1 more source
Frontiers in Sports and Active Living, 2023 IntroductionImproving swimming performance involves assessments of biomechanical variables of the stroke, and it can be achieved using semi-tethered swimming tests. The aim of this study was thus to investigate the associations between load-velocity (L-V)
Yannis Raineteau +8 more
doaj +1 more source
Supersonic Combustion in Air-Breathing Propulsion Systems for Hypersonic Flight
, 2018 Great efforts have been dedicated during the last decades to the research and development of hypersonic aircrafts that can fly at several times the speed of sound.
J. Urzay
semanticscholar +1 more source
Fan Stage Design and Performance Optimization for Low Specific Thrust Turbofans
International Journal of Turbomachinery, Propulsion and Power, 2023 In modern turbofan engines, the bypass section of the fan stage alone provides the majority of the total thrust required in cruise, and the size of the fan has a considerable effect on the overall engine weight and nacelle drag.
Oliver Sjögren +3 more
doaj +1 more source
Light-switchable propulsion of active particles with reversible interactions [PDF]
Nature Communications, 2020 Active systems such as microorganisms and self-propelled particles show a plethora of collective phenomena, including swarming, clustering, and phase separation.
H. R. Vutukuri +3 more
semanticscholar +1 more source