Reynolds number limits for jet propulsion: A numerical study of simplified jellyfish [PDF]
, 2010 The Scallop Theorem states that reciprocal methods of locomotion, such as jet propulsion or paddling, will not work in Stokes flow (Reynolds number = 0).
Herschlag, Gregory, Miller, Laura A.
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Ramjet Nozzle Analysis for Transport Aircraft Configuration for Sustained Hypersonic Flight
Applied Sciences, 2018 For the past several decades, research dealing with hypersonic flight regimes has been restricted mainly to military applications. Hypersonic transportation could be a possible and affordable solution to travel in the medium term and there is renewed ...
Raman Baidya +2 more
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Photonic spin control for solar wind electric sail
, 2013 The electric solar wind sail (E-sail) is a novel, efficient propellantless propulsion concept which utilises the natural solar wind for spacecraft propulsion with the help of long centrifugally stretched charged tethers.
Janhunen +4 more
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System controls challenges of hypersonic combined-cycle engine powered vehicles [PDF]
Hypersonic aircraft with air-breathing engines have been described as the most complex and challenging air/space vehicle designs ever attempted. This is particularly true for aircraft designed to accelerate to orbital velocities.
Ianculescu, George D. +1 more
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Sensors, 2018 Frailty assessment is dependent on the availability of trained personnel and it is currently limited to clinic and supervised setting. The growing aging population has made it necessary to find phenotypes of frailty that can be measured in an ...
Hadi Rahemi +3 more
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Deployment of Solar Sails by Joule Effect: Thermal Analysis and Experimental Results
Aerospace, 2020 Space vehicles may be propelled by solar sails exploiting the radiation pressure coming from the sun and applied on their surfaces. This work deals with the adoption of Nickel-Titanium Shape Memory Alloy (SMA) elements in the sail deployment mechanism ...
Gianluigi Bovesecchi +4 more
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Evaluation of the use of on-board spacecraft energy storage for electric propulsion missions [PDF]
On-board spacecraft energy storage represents an under utilized resource for some types of missions that also benefit from using relatively high specific impulse capability of electric propulsion.
Palmer, F. M., Poeschel, R. L.
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Effect of Feedback on Foot Strike Angle and Forward Propulsion in People With Stroke
IEEE Transactions on Neural Systems and Rehabilitation EngineeringEffective retraining of foot elevation and forward propulsion is essential in stroke survivors’ gait rehabilitation. This study aimed to investigate the effect of providing real-time feedback on foot strike angle (FSA) and forward propulsion in ...
Carmen J. Ensink +3 more
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Fringe Visibility Estimators for the Palomar Testbed Interferometer [PDF]
, 1998 Visibility estimators and their performance are presented for use with the Palomar Testbed Interferometer (PTI). One operational mode of PTI is single-baseline visibility measurement using pathlength modulation with synchronous readout by a NICMOS-3 ...
Colavita Jet Propulsion, M. M. Colavita
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Operationally Efficient Propulsion System Study (OEPSS) data book. Volume 4: OEPSS design concepts [PDF]
This study was initiated to identify operations problems and cost drivers for current propulsion systems and to identify technology and design approaches to increase the operational efficiency and reduce operations costs for future propulsion systems. To
Farhangi, Shahram +2 more
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