Keyword: Gas turbines

Briefs: Sensors/Data Acquisition
Early flutter detection will help in the development of safer and more eco-friendly aircraft turbines.
Briefs: Aerospace
This additively manufactured alloy is tailored for high-temperature applications.
Briefs: Electronics & Computers
These barrier coatings protect high-performance components in extreme environments.
Briefs: Mechanical & Fluid Systems

Gas turbine blades of conventional rotorcraft turboshaft engines are optimized to operate at nearly a fixed speed and a fixed incidence angle. If the operating condition of the engine changes, then the flow...

Briefs: Test & Measurement

Measurement devices that can withstand the acid rains on Venus, radiation in space, and the heat of car engines are being developed to improve research in these extreme...

Application Briefs: Energy
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Avangrid Renewables is a subsidiary of Avangrid, Inc., and part of the Spain-based Iberdola Group, the largest wind...

Briefs: Materials

NASA's Glenn Research Center has developed high-temperature solid lubricant materials suitable for foil gas bearings that enable the...

Briefs: Materials
Advanced Multilayer Environmental Barrier Coatings

Innovators at NASA’s Glenn Research Center have created exciting new developments in thermal barrier coatings, both in the chemical compositions of the coatings and in the process by which they are applied. NASA’s researchers have developed a revolutionary bond coat system that improves the...

Briefs: Propulsion

Turbine film cooling flows typically are subject to jet detachment and reduced cooling effectiveness for high blowing rates. Current concepts to improve jet attachment involve impractical or overly complex hole designs...

Briefs: Mechanical & Fluid Systems

NASA’s Langley Research Center develops innovative technologies to control fluid flow in ways that will ultimately result in improved performance and fuel efficiency....

Briefs: Energy

NASA’s Glenn Research Center has developed a novel design for a fully premixed, high-pressure burner capable of operating on a variety of gaseous fuels and oxidizers, including...

Application Briefs: Test & Measurement

Torque is among the most important of all the measured quantities in applications ranging from characterizing high-power gas turbines, to determining the level of force...

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: Energy

A local energy source is desired for near-shore and offshore applications. Gas generators, diesel generators, and long-length submerged power cables tend to be expensive. A proposed solution is to use offshore...

Briefs: Materials
Multi-Species Turbulent Mixing Under Supercritical-Pressure Conditions

A model describing supercritical-pressure, multi-species turbulent mixing has been developed to simulate situations prevailing in diesel, gas turbine, and HCCI (homogeneous charge compression ignition) engines. It is also a situation occurring in atmospheric planetary...

Briefs: Sensors/Data Acquisition

Blade health monitoring continues to gain interest as a means of assessing the health of turbine airfoils in aerospace and ground-based gas turbine engines in fleet operation. Many...

Articles: Energy

For more than two decades, nearly all renewable energy endeavors have incorporated the latest advances in turbomachinery design and turbomachinery manufacturing technology in an...

Briefs: Information Technology
Simulation of Oxygen Disintegration and Mixing With Hydrogen or Helium at Supercritical Pressure

The simulation of high-pressure turbulent flows, where the pressure, p, is larger than the critical value, pc, for the species under consideration, is relevant to a wide array of propulsion systems, e.g. gas turbine, diesel, and liquid...

Briefs: Green Design & Manufacturing

Hybrid Power Management (HPM) is the integration of diverse, state-of-the-art power devices in an optimal configuration for space and terrestrial applications. The basic vehicle architecture...

Briefs: Materials

A material having useful thermoelectric properties was synthesized by combining indium-tin-oxide (ITO) with a NiCoCrAlY alloy/alumina cermet. This material had a very large...

Articles: Aerospace
50 Years of Inspiration

We wanted NASA Tech Briefs readers to be a part of our special issue celebrating NASA's 50th anniversary. So, we asked you to tell us how NASA, and NASA Tech Briefs, have inspired you over the past 50 years. We wanted to know how NASA helped you in your career or business, or improved your everyday life. What benefits...

Articles: Robotics, Automation & Control

The use of variable-frequency drives (VFDs) to control AC motors has increased dramatically in recent years. In addition to low operating cost and high performance, they save energy....

Briefs: Physical Sciences

A study of four previously published computational criteria for identifying vortices in high-pressure flows has led to the selection of one of them as the best. This development can...

Briefs: Mechanical & Fluid Systems
Two High-Temperature Foil Journal Bearings

An enlarged, high-temperature -compliant foil bearing has been built and tested to demonstrate the feasibility of such bearings for use in aircraft gas turbine engines. At 150 mm in diameter, this is the largest foil bearing known to date. This bearing is a scaled-up version of a patented...

Briefs: Sensors/Data Acquisition
Optical Sensing of Combustion Instabilities in Gas Turbines

In a continuing program of research and development, a system has been demonstrated that makes high-speed measurements of thermal infrared radiance from gas-turbine engine exhaust streams. When a gas-turbine engine is operated under conditions that minimize the emission of pollutants,...

Briefs: Materials
Multicomponent, Rare-Earth-Doped Thermal-Barrier Coatings

Multicomponent, rare-earth-doped, perovskite-type thermal-barrier coating materials have been developed in an effort to obtain lower thermal conductivity, greater phase stability, and greater high-temperature capability, relative to those of the prior thermal-barrier coating material of...

Briefs: Physical Sciences

A comprehensive mathematical model of mass diffusion has been developed for binary fluids at high pressures, including critical and supercritical pressures. Heretofore, diverse...

Briefs: Materials
Scandia-and-Yttria-Stabilized Zirconia for Thermal Barriers

Zirconia stabilized with both scandia and yttria in suitable proportions has shown promise of being a superior thermal-barrier coating (TBC) material, relative to zirconia stabilized with yttria only. More specifically, a range of compositions in the zirconia/scandia/yttria material...

Briefs: Mechanical & Fluid Systems

An eight-pole radial magnetic bearing has been modified into a switched-reluctance electric motor capable of operating at a speed as high as 8,000 rpm at a temperature as high as 1,000 °F...