Thrust Research Papers - Academia.edu (original) (raw)

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- Stress, Thrust
- by Thomas Armstrong
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- Psychology, Ergonomics, Biomechanics, Stability
- by Nancy Black
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- by christine Arrasate
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- by sri rajah
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- by Anestis Kalfas
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- by Bong Wie
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- Mechanical Engineering, Aerospace Engineering, Spinning, Moment of Inertia
- by Michael Lafiandra and +1
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- Leadership, Human Factors Engineering, Interactions, Robots
- by Robert Zubrin
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- Magnetic field, Spacecraft Propulsion, Solar Wind, Lift
- by Robert Zubrin
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- Magnetic field, Spacecraft Propulsion, Solar Wind, Lift
- by Kamlesh Kumar
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- Mechanical Engineering, Control Systems Engineering, Aerospace Engineering, Uav
- by Chong Chu
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- Manufacturing Engineering, Intermittency, Chip, Thrust
- by vincenzo picotti
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- Geodesy, Coevolution, Tectonics, Sedimentary Basins
- by John Young
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- Mechanical Engineering, Aerospace Engineering, Oscillations, Lift
- by rajiv chaudhary
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- Mechanical Engineering, Wear, Vibration, Drilling
- by Terry Engelder
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- Geology, Subsidence, Sequence Stratigraphy, Devonian

Calculations of resultant electrostatic force on a charged spherical or cylindrical capacitor with two sectors of different dielectrics, based on the classical formulas of electrostatic pressure, Kelvin polarization force density, and Maxwell stress tensor predict a reactionless force that violates Newton’s 3rd law. Measurements didn’t confirm the existence of such a reactionless thrust, thus there is an apparent inconsistency in the classical EM theory that leads to wrong results.

- by Zoltan Losonc
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- Electrical Engineering, Physics, Electromagnetism, Electrostatics
- by Kelvin Oie
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- Leadership, Human Factors Engineering, Interactions, Robots
- by Ram Kossowsky
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- Magnetohydrodynamics, Fluid Mechanics, Energy, Theory
- by Dane Larkin
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- Actuators, Thermal, VECTOR, Thrust
- by Konstantinos Kyprianidis
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- Mechanical Engineering, Aerospace Engineering, Design, Thrust
- by Abbas Shiri
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- Genetic Algorithm, Optimization, Electrical Engineering Technology, Efficiency
- by Ian Alsop
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- Geology, Geochemistry, Geophysics, Tectonophysics

ABSTRACT A mechanical device such as an aircraft gas turbine engine will in its lifetime of service show the effects of damage and deterioration. The damage to (and deterioration of) an engine has an adverse effect on the engine's overall performance. It is therefore vitally important to predict the effects of deterioration on the performance of an engine and on the economic (fuel burn and engine life) implications from an operator's perspective. Engine component degradation leads to performance deterioration and change, which requires the engine to run hotter and faster so as to meet the required thrust and aircraft performance. Increasing engine operating temperatures and engine speed result in increased creep and fatigue damage to the hot section components and increases the engine life cycle costs. One way of reducing life cycle costs is by better usage of the engine and involves being certain about the life potential of the engine and its components and how this life evolves with use. A sound understanding of how the engine life evolves and to predict remaining life requires understanding the engine's operating environment and how component damage is sustained and accumulated. Knowledge about the engine condition and the likely stresses to which it will be subjected is required to analyse engine component usage and reduce degradation, raise safe-life limits of components and reduce maintenance requirements. This paper lays the foundation for the development of a prognostic tool that will capture and model the mechanisms of degradation, and predict levels of degradation based on engine deployment. The mechanisms that will cause degradation are assessed and integrated to establish the requirements of the tool. The paper discusses how degradation will affect component and engine performance and also the life of the engine.

- by Rukshan Navaratne
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- Stress, Creep, Thrust, Operating Temperature
- by Vladimir Blanco
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- Geology, Migration, Biostratigraphy, Geometry
- by Christopher Waits
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- Packaging, Modeling, Wear, Microelectromechanical systems

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- by Konstantinos Kyprianidis
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- Engineering, Aerospace Engineering, Thermodynamics, Modeling
- by Alan Wadcock and +1
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- Aerodynamics, Interactions, Measurement, Wind Tunnel
- by Kirk Osadetz
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- Geology, Geophysics, Fracture, Stable Isotopes
- by Nikolaos Bilalis and +2
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- Materials Engineering, Computer Aided Design, Modeling, Manufacturing Engineering
- by Alain Cocherie
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- Geology, Tectonics, Geochronology, Geodynamics
- by Luis López-Rivera
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- Radiation, Seismic Hazard, Energy, Multidisciplinary
- by nasa sava
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- Mechanical Engineering, Aerospace Engineering, Patterns, Air

The stratigraphic separation diagram (SSD) is an often neglected tool of fault analysis, which assists with the interpretation of both the fault-surface geometry and the mechanism of faulting. As the SSD needs to evaluate displacement or separation along the fault, this particular method can be used only in areas with well-documented stratigraphic sequences. This paper presents details of some common patterns obtained when using SSDs and also discusses some real examples of two apparently similar faults found in the Barrandian area in the Czech Republic. Although both the Prague and the Tachlovice faults in the Barrandian area seem to be of the same character (the same strike, remarkable stratigraphic separation, similar localization in the Prague Synform), the SSDs of these two faults demonstrate the difference in fault surface geometries and consequently a very distinct mechanism of origin. The Tachlovice Fault is one of the main thrusts in the Prague Synform. It has ramp-flat geometry and is associated with fault-related folds. The Prague Fault, on the other hand, was formed later, after the initial folding, and belongs to a group of steep translatory faults. It is shown how SSDs are practical, effective tools for the analysis of these types of faults and associated stratigraphies without the need of 3D seismics or boreholes. Copyright © 2010 John Wiley & Sons, Ltd.

- by Jiri Janecka
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- Tectonics, Palaeozoic fish, Barrandian, Stratigraphic Separation Diagram
- by Massimiliano Porreca
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- Paleomagnetism, Tectonics, Multidisciplinary, Age
- by Margarita Díaz Molina
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- Geology, Flow, Reservoir, Orientation
- by Semezem Family
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- Mechanical Engineering, Civil Engineering, Materials Science, AAU

This research explores ways of reducing frozen flow losses via state-resolved numerical simulations (quasi 1-D, 2D, and 2D with swirl). Frozen flow losses in molecular vibration, rotation, and electronic excitation are believed to account for significant losses in thrust and efficiency of arcjet thrusters. This report summarizes the accomplishments in the first two years of a four year research program designed to quantify frozen flow losses, and to generate design tools useful for the designer to enhance arcjet performance.

- by Vish Subramaniam
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- Plasma Physics, Vibration, Space Propulsion, Simulation
- by Miguel Gutierrez
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- Modeling, Manufacturing Engineering, Tool wear, Drilling
- by Chandra Nath
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- Mechanical Engineering, Manufacturing, Modeling, Ultrasound
- by Stephen Rippington
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- Geology, Tectonics, Peridotite, Models
- by D. Cheer
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- Earth Sciences, Geology, Sedimentology, Energy
- by Martin Jun
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- Modeling, Edge Detection, Manufacturing Engineering, Chip

Ducted fan based vertical lift systems are excellent candidates to be in the group of the next generation vertical lift vehicles, with many potential applications in general aviation and military missions. Although ducted fans provide high performance in many “vertical take-off and landing” (VTOL) applications, there are still unresolved problems associated with these systems. Fan rotor tip leakage flow adversely affects the general aerodynamic performance of ducted fan VTOL unmanned aerial vehicles (UAVs). The current study utilized a three-dimensional Reynolds-averaged Navier–Stokes (RANS) based computational fluid dynamics (CFD) model of ducted fan for the development and design analysis of novel tip treatments. Various tip leakage mitigation schemes were introduced by varying the chordwise location and the width of the extension in the circumferential direction. Reduced tip clearance related flow interactions were essential in improving the energy efficiency and range of ducted ...

- by Cengiz Camci
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- Engineering, Mechanical Engineering, Aerospace Engineering, Design
- by Jacek F. Gieras
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- Engineering, Linear Induction Motor, Linear Motor, Thrust
- by Marina Campolo
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- Heat Transfer, Nanotechnology, Numerical Simulation, Turbulent Flow