Keyword: Exhaust systems

Briefs: Aerospace

A system of nozzles and pylons that redistributes jet exhaust noise sources upstream to reduce jet noise has been developed. Certain aircraft configurations install the propulsion...

Briefs: Materials
Self-Healing, Self-Lubricating Tribofilm

Tribologists have developed a diamond-like film that is generated by the heat and pressure of an automotive engine. The ultra-durable, self-lubricating tribofilm — a film that forms between moving surfaces — can be made to develop self-healing, diamondlike carbon (DLC) tribofilms. The film generates...

Briefs: Materials

At high temperatures, currently available cast stainless steel alloys used for engine component applications do not have the long-term stability of their original castings, and are lacking in their...

Briefs: Materials
Methodology for the Effective Stabilization of Tin-Oxide-Based Oxidation/ReductionCatalysts

NASA Langley researchers, in work spanning more than a decade, have developed a portfolio of technologies for low-temperature gas catalysis. Originally developed to support space-based CO2 lasers, the technology has evolved into an...

Articles: Automotive

Krishan Arora, Mike Baker, Glenn Barber, Peter Brett, Ross Dewhurst, Melvyn Dover, John Gamston, Steven Goodier, Annie Leeson, Vincent Panel, Ben Russell, Alessandra...

Briefs: Aerospace
Aircraft Engine Exhaust Nozzle System for Jet Noise Reduction

Conventional aircraft typically include propulsion engines that are under the wing or tail surfaces. Each propulsion engine system includes an engine housed in a nacelle with an inlet and a nozzle system. Primary component noise sources from the engine system include the noise...

Application Briefs: Photonics/Optics

Modern fiber optics have undergone remarkable advances since their development in the 1960s. The growing demand for fiber-optic cable, especially in the telecommunications industry, has led to an...

Briefs: Electronics & Computers

Sensors have improved in terms of size, capability, and power consumption, but their deployment in remote areas is limited by battery power supplies. Using piezoelectric (PE) materials for energy...

Briefs: Manufacturing & Prototyping
Design and Analysis of Metal-to-Composite Nozzle Extension Joints

Analysis, design, fabrication, and testing were performed to create a new joint design for potential use in attaching a domestically available carbon-carbon (C–C) nozzle extension to the turbine exhaust manifold of a J-2X engine. Various attachment methods were investigated for...

Briefs: Materials
Catalyst for Treatment and Control of Post-Combustion Emissions

Emissions from fossil-fuel combustion contribute significantly to smog, acid rain, and global warming problems, and are subject to stringent environmental regulations. These regulations are expected to become more stringent as state and regional authorities become more involved in...

Briefs: Physical Sciences

A revolutionary way is proposed of studying the surface of Mars using a wind-driven network of mobile sensors: GOWON. GOWON would be a scalable, self-powered and...

Briefs: Materials
Hybrid Filter Membrane

Cabin environmental control is an important issue for a successful Moon mission. Due to the unique environment of the Moon, lunar dust control is one of the main problems that significantly diminishes the air quality inside spacecraft cabins. Therefore, this innovation was motivated by NASA’s need to minimize the...

Products: Lighting

The Spectroline® EK-3000 EagleEye™ UV-A/White Light LED Inspection Kit (patents pending) from Spectronics Corp. (Westbury, NY) features the palm-sized, cool-running EagleEye inspection lamp. The kit is engineered...

Articles: Robotics, Automation & Control
Hybrid Rotor Compressor for Natural Gas Extraction Jeremy Pitts and Pedro Santos, OsComp Systems, Boston, MA

Natural gas is a booming industry in the U.S. and represents a bridge energy solution to...

Briefs: Materials
Straight-Pore Microfilter With Efficient Regeneration

A novel, high-efficiency gas particulate filter has precise particle size screening, low pressure drop, and a simple and fast regeneration process. The regeneration process, which requires minimal material and energy consumption, can be completely automated, and the filtration performance can...

Briefs: Physical Sciences
Method of Heating a Foam-Based Catalyst Bed

A method of heating a foam-based catalyst bed has been developed using silicon carbide as the catalyst support due to its readily accessible, high surface area that is oxidation-resistant and is electrically conductive. The foam support may be resistively heated by passing an electric current through...

Articles: Medical

Advances in medical design are paving the way for diagnostic and treatment options that previously were thought to be impossible. Today, surgeons, emergency medical...

Articles: Transportation
Internally Radiating Impulse Structure (IRIS) Engine Corban Tillemann-Dick
Tendix LLC
Denver, CO

The vast majority of internal combustion engines we...

Briefs: Physical Sciences

Pilot scale experiments have demonstrated a method of reducing the amounts of oxides of nitrogen (NOx) emitted by industrial boilers and powerplant combustors that...

Briefs: Robotics, Automation & Control

An improved type of exhaust nozzle has been invented to help optimize the performances of multitube detonative combustion engines. The invention is applicable to both air-breathing...

Briefs: Mechanical & Fluid Systems
Hybrid Automotive Engine Using Ethanol-Burning Miller Cycle

A proposed hybrid (internal-combustion/ electric) automotive engine system would include as its internal-combustion subsystem, a modified Miller-cycle engine with regenerative air preheating and with autoignition like that of a Diesel engine. The fuel would be ethanol and would be...

Briefs: Mechanical & Fluid Systems

As part of a Small Business Innovation Research (SBIR) grant from TACOM (Tank-Automotive & Armaments Command) - a division of the U.S. Army -Adiabatics used multiphysics...

Briefs: Electronics & Computers

Relatively inexpensive, lightweight biplates for methanol fuel cells have been proposed. The reductions in weight and cost, relative to biplates now used in methanol fuel cells, would be...

Briefs: Mechanical & Fluid Systems
Improved Mufflers for General Aviation

Innovative designs of mufflers for engines of small airplanes have been investigated in an effort to satisfy conflicting demands to maximize the reduction of exhaust noise while minimizing back pressure, size, and weight. Automotive-type muffler designs are not suitable for this purpose because they entail...

Briefs: Materials

Thermal-insulation blankets developed for use aboard the space shuttle can be adapted to a racing car to protect the driver against excessive cockpit heating. [Also see an earlier article...

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