Keyword: Auxiliary power units

Articles: Energy
Metamaterial printing, high-efficiency solar cells, and a noise-reduction material.
Briefs: Energy

Innovators at NASA’s Glenn Research Center have developed two novel technologies that make Stirling engines more efficient and less costly. First, Glenn’s thermoacoustic power converter uses sound to turn heat into...

Briefs: Software

The Federal Aviation Administration's Aviation Environmental Design Tool (AEDT) is a software system that dynamically models aircraft performance in space and time to estimate fuel consumption,...

Briefs: Manufacturing & Prototyping

Human-occupied vehicles and autonomous vehicles such as rovers and landers may benefit from the fuel flexibility and high energy density of solid oxide fuel cells (SOFCs),...

Articles: Automotive

Thomas Healy, RF Culbertson, AJ Emanuele, Morgan Culbertson, Wilson Sa, Pam Culbertson, Chad Saylor, Len...

Briefs: Materials

Modern mechanical carbon materials are being used in a wide variety of applications, including aircraft gear boxes, air turbine motor starters, and main shaft seals for both aircraft...

Briefs: Manufacturing & Prototyping
Passive Destructive Interference Acoustic Liner for a Turbofan Engine Using Additive Manufacturing

This technology exploits the capabilities of additive manufacturing to attenuate the fan noise within the inlet or aft duct of a turbofan engine. The approach may be expanded to include auxiliary power units, environmental control systems, or other...

Briefs: Software
Gaseous Nitrogen Orifice Mass Flow Calculator

The Gaseous Nitrogen (GN2) Orifice Mass Flow Calculator was used to determine Space Shuttle Orbiter Water Spray Boiler (WSB) GN2 high-pressure tank source depletion rates for various leak scenarios, and the ability of the GN2 consumables to support cooling of Auxiliary Power Unit (APU) lubrication...

Briefs: Information Technology
Stiffness and Damping Coefficient Estimation of Compliant Surface Gas Bearings for Oil-Free Turbomachinery

Foil gas bearings are a key technology in many commercial and emerging oilfree turbomachinery systems. These bearings are nonlinear and have been difficult to analytically model in terms of performance characteristics such as load capacity,...

Briefs: Materials

Three color-indicating devices have been conceived as simple, rapid, inexpensive means of detecting hazardous liquid and gaseous substances in settings in which safety is of paramount...

Briefs: Electronics & Computers
Automated Analysis, Classification, and Display of Waveforms

A computer program partly automates the analysis, classification, and display of waveforms represented by digital samples. In the original application for which the program was developed, the raw waveform data to be analyzed by the program are acquired from space shuttle auxiliary...

Briefs: Automotive

A government/ industry/ academic cooperative has developed a hybrid electric transit bus (HETB). The goals of the development program, which continues, include doubling the fuel...

Briefs: Software
Program Simulates Performance of a Hybrid Automobile

The Hybrid Electric Vehicle Analysis (HEVA) computer program numerically simulates the performance of an automotive vehicle -- especially a hybrid vehicle. A vehicle is said to be hybrid if (1) it contains an energy-storage device (a battery, flywheel, or ultra-capacitor) that is charged with...

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Briefs: Aerospace

Self-Healing, Recyclable, Shape Memory Polymers

NASA Spinoff: Materials

Nanotechnology Repairs Engine Damage in Cars

INSIDER: Robotics, Automation & Control

Autonomous Robot Opens Doors, Finds Wall Outlets

Application Briefs: Sensors/Data Acquisition

Sensing Hazardous Gases Can Save Lives

INSIDER: Semiconductors & ICs

Smaller, Cheaper, and More Dynamic Computer Chips

INSIDER: Motion Control

Non-Contact Tip/Tilt Sensor