Keyword: Combustion and combustion processes

Briefs: Propulsion
Advanced analyses shed light on the mechanism of a deadly problem plaguing combustion chambers in rocket engines.
Briefs: Imaging
The engine could make rockets not only more fuel-efficient, but also more lightweight and less complicated to construct.
5 Ws: Electronics & Computers
Imagine a tablet or Kindle that can display braille on command for the visually impaired.
Application Briefs: Manufacturing & Prototyping
See why Mohawk Innovative Technology, Inc. is excited for the potential of additive manufacturing.
Briefs: Energy
Traditional spark plugs are replaced by an optical pumping source.
Briefs: Aerospace
These robust materials convert excess heat energy into electricity.
Briefs: Software

A numerical modeling tool allows for a better understanding of rotating detonation engines (RDEs).

Briefs: Electronics & Computers

Two very challenging problems facing the U.S. and the world are energy security and global climate change, largely due to dependence on fossil fuels. Cost-effective technologies have been developed that are...

Briefs: Motion Control

NASA Goddard Space Flight Center developed gear bearing technology that combines gear and bearing functions into a single unit that significantly improves gear drives for electrical, internal combustion, and turbine motors. The...

Articles: Automotive

The first mass-produced electric vehicles (EVs) hit the road late in 2010 with the introduction of the Nissan Leaf, which remains the world’s top-selling,...

Briefs: Photonics/Optics

An optical setup developed by researchers at Sandia's Combustion Research Facility and the Technical University of Denmark can now quantify the formation of soot — particulate matter consisting...

Briefs: Mechanical & Fluid Systems

Typical direct-injection engines, such as diesel engines, can produce soot due to fuel-rich combustion conditions. Filters and catalytic converters are currently used to reduce soot and harmful...

Briefs: Electronics & Computers
Ionization-Based Multidirectional Flow Sensor

One significant area of research in fuel cell technology includes systems in which a fuel cell is combined with another power generation device (a turbine, for example) to create a hybrid system that combines the advantages of the two standalone systems, resulting in a high fuel-to-electricity...

Briefs: Materials
Non-Toxic HAN Monopropellant Propulsion

A highly miniaturized, MR-143, green monopropellant thruster was developed for 1N thrust. Testing indicated the initial catalyst bed heater was insufficient. In subsequent development, the thruster was equipped with a more efficient catalyst bed heater. For reliable ignition of the advanced, non-toxic,...

Briefs: Propulsion
Method for Establishing Cool Flames and Flameless Fuel Oxidation with Zero Emissions Using Non-Equilibrium Plasma Activation

Current engines and combustors run at high temperature, which leads to problems of engine knocking, soot and NOx emissions, and difficulty in combustion control. On the other hand, low-temperature combustion and fuel...

Briefs: Imaging
Non-Catalytic Ignition System for High-Performance Advanced Monopropellant Thrusters

Anon-catalytic pyrotechnic ignition system was developed for advanced green monopropellant systems operating with hydroxylammonium nitrate (HAN)-based monopropellant AF-M315E. This technology will provide increased performance and new operating regimes for...

Articles: Sensors/Data Acquisition

This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that...

Briefs: Semiconductors & ICs

The SolidSense sensor platform measures all EPA-regulated gas emissions (nitrogen oxides, carbon monoxide, and hydrocarbons), in addition to ammonia, with high accuracy and sensitivity. The chip-scale gas...

Briefs: Mechanical & Fluid Systems

An orifice element is commonly used in liquid rocket engine test facilities either as a flow metering device, a damper for acoustic resonance, or to provide a large reduction in pressure over a very...

Briefs: Motion Control

Currently available air motors have many advantages over electric motors. They are more compact, lighter-weight, instantly reversible without sparking, create no heat buildup, are undamaged by...

Briefs: Propulsion
Rotary Piston Engine

There are many applications where a high power-to-weight engine is either necessary or helpful. Uses for this type of engine range from handheld power equipment, to motorcycles and aircraft — uses multiply when fuel efficiency, compactness, and versatility are added. Currently, there are few viable options available to...

Briefs: Mechanical & Fluid Systems
Low-Power, Lightweight, Ultra-Compact Reverse Water Gas Shift Reactor

Utilizing CO2 to produce H2O and O2 is critical for sustained manned missions in space, and supports both NASA’s cabin Atmosphere Revitalization System (ARS) and ln-situ Resource Utilization (ISRU) concepts. For long-term missions beyond low...

Briefs: Manufacturing & Prototyping
Atomic Layer Deposition (ALD) Coating of High-Precision Components Produced by Selective Laser Melting (SLM)

Atomic Layer Deposition (ALD) is being used as a means of coating various substrate materials with a variety of metallic and ceramic oxides for corrosion and thermal protection. The technology necessary to develop a state-of-the-art,...

Briefs: Motion Control
Improving Stirling Engine Performance Through Optimized Piston and Displacer Motion

Stirling engines typically achieve high efficiency, but lack power density. Low power density prevents them from being used in many applications where internal combustion engines are viable competitors, and increases system costs in applications that require...

Briefs: Software
Study of Formulating Conserved Scalar Equations for Turbulent Reactive Flows with General Species Mass- Diffusion Coefficients for Utilization in Flamelet Models

The modeling of turbulent reactive flows is a subject of contemporary research. Current turbulent-reaction models cannot account for realistic complexities such as distinct species...

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: Aerospace

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...

Briefs: Electronics & Computers

Researchers at NASA’s Glenn Research Center have developed a revolutionary new generation of silicon...

Briefs: Materials
Approach for Achieving Flame Retardancy While Retaining Physical Properties in a Compatible Polymer Matrix

NASA’s Kennedy Space Center (KSC) seeks to license its Advanced Fire Retardant Materials to industry. KSC’s scientists have developed processes and know-how to impart fire retardancy to common polymers such as nylons, polyesters, and...