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Thrust-Augmented Nozzles for Rocket Engines
Thrust-Augmented Nozzles for Rocket Engines hot!
Date: Feb-01 2007

The afterburner concept is adapted from turbojet to rocket engines.

The thrust-augmented nozzle (TAN) has been invented as a means of obtaining ...

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Thermal Design and Analysis of a Rocket-Engine TAN Injector
Thermal Design and Analysis of a Rocket-Engine TAN Injector hot!
Date: Feb-01 2007

Predicted and measured temperature rises were found to be in approximate agreement.

A subscale thrust-augmented-nozzle (TAN) rocket engine was designed, built, and ...

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The Future of Space Propulsion
The Future of Space Propulsion hot!
Date: Feb-05 2008
Apaper presents an overview of state of the art of space propulsion, oriented toward attempting to understand recent history in order to make some predictions ...
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Tethered, Remotely Operated Miniature Submarine
Tethered, Remotely Operated Miniature Submarine hot!
Date: Apr-01 2008

A tethered, remotely operated, armed underwater vehicle has been conceived to satisfy a need for an uninhabited vehicle for Navy missions in which positive ...

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Some Advances in Reducing Drag and Suppressing Convection
Some Advances in Reducing Drag and Suppressing Convection hot!
Date: Jun-01 2007

Theoretical and computational research has yielded some advances in the art of designing active feedforward and feedback controllers to suppress thermal convection and reduce ...

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Simulations of Stall and Stall Control in Turbocompressors
Simulations of Stall and Stall Control in Turbocompressors
Date: Apr-03 2007

In an application of computational fluid dynamics (CFD), flow fields about a slender-bodied finned projectile and the resulting aerodynamic forces and moments on the ...

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Simulations of Brush Contacts of Homopolar Motor/Generators
Simulations of Brush Contacts of Homopolar Motor/Generators hot!
Date: Dec-01 2007

Time-dependent distributions of electromagnetic force and heating were studied.

A computational- simulation study of distributions of electric current and temperature in brushes ...

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Miniature Wheel-Leg Mobile Robots
Miniature Wheel-Leg Mobile Robots hot!
Date: Feb-05 2008
Mini-Whegs™ are small mobile robots, designed according to abstracted cockroach locomotion principles, that can run and can climb obstacles taller than themselves. Mini-Whegs are ...
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MEMS Offset-Beam Torsional Electrothermal Actuators
MEMS Offset-Beam Torsional Electrothermal Actuators
Date: Jun-01 2008

Progress has been made toward realizing larger-force, larger-displacement MEMS actuators.

Prototypes of microelectromechanical system (MEMS) rotational actuators based on a principle of ...

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Hybrid Three-Axis Vibration Reducers
Hybrid Three-Axis Vibration Reducers hot!
Date: Jun-01 2007

Hybrid (passive/active) devices have been developed to reduce the magnitudes of possibly threedimensional vibrations coupled from vibrating equipment on platforms to bases that ...

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