Browse Topic: Oxygen

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The Sky’s the Limit... Except for FuelLIFTOFF202411/8/2024
Oxygen and Petrol
A-10 Aircraft Oxygen Equipment Committee
The Portable Helicopter Oxygen Delivery System (PHODS) in the Altitude Chamber: Cerebral and Peripheral Blood Oxygen and Perceptual VigilanceF-0078-2022-175125/10/2022
ABSTRACT
Ard, Dennis, Petrassi, Frank, Temme, Leonard, Bowers,  Bobby, Hayes,  Amanda, St.Onge,  Paul, McAtee, Aaron
Insulating Component, Molded, Electrical, Heat Shrinkable, Connector and Cable Accessory, Sealing Strain Relief, General Specification ForAS5258A (Current)10/13/2021
This specification covers connector and cable accessory heat shrinkable, electrical insulating, molded components fabricated from various polymer based compositions. These components are intended for use as connector and cable accessory components to provide strain relief, electrical insulation, and environmental sealing.
AE-8C1 Connectors Committee
Insulating Component, Molded, Electrical, Heat Shrinkable, Connector and Cable Accessory, Sealing Strain Relief, General Specification ForAS5258A-TEST-REC (Historical)10/13/2021
This specification covers connector and cable accessory heat shrinkable, electrical insulating, molded components fabricated from various polymer based compositions. These components are intended for use as connector and cable accessory components to provide strain relief, electrical insulation, and environmental sealing.
AE-8C1 Connectors Committee
Minimum Standard for Portable Gaseous, Oxygen EquipmentAS1046C (Historical)8/11/2021
This standard is intended to apply to portable compressed gaseous oxygen equipment. When properly configured, this equipment is used either for the administration of supplemental oxygen, first aid oxygen or smoke protection to one or more occupants of either private or commercial transport aircraft. This standard is applicable to the following types of portable oxygen equipment: a Continuous flow 1 Pre-set 2 Adjustable 3 Automatic b Demand flow 1 Straight-demand 2 Diluter-demand 3 Pressure-demand c Combination continuous flow and demand flow.
A-10 Aircraft Oxygen Equipment Committee
Aluminum Alloy Powder 4.6Cu - 3.4Ti - 1.4B - 0.75Ag - 0.27MgAMS7033 (Current)6/22/2021
This specification covers an aluminum alloy in the form of pre-alloyed powder.
AMS AM Additive Manufacturing Metals
Aluminum Alloy Powder 4.6Cu - 3.4Ti - 1.4B - 0.75Ag - 0.27MgAMS7033-TEST-REC (Historical)6/22/2021
This specification covers an aluminum alloy in the form of pre-alloyed powder.
AMS AM Additive Manufacturing Metals
Investigating the Effect of Water and Oxygen Distributions on Consistency of Current Density Using a Quasi-Three-Dimensional Model of a PEM Fuel Cell2021-01-07374/6/2021
Activation loss, mass transfer loss and ohmic loss are the three main voltage losses of the polymer electrolyte membrane fuel cell. While the former two types are relevant to concentration of oxygen in catalyst layer and the later one is associated with the water content in membrane. Distributions of water content and oxygen in a single cell are inconsistent which cause that current densities in each segment of the single cell are different. For the dry inlet gas, the water in the segments near the gas inlet channel will be carried to the segments near the gas outlet channel, which causes high ohmic loss of the segments near the gas inlet channel. In this work, a transfer non-isothermal quasi-three-dimensional model is developed to investigate inconsistency of current densities. Comprehensive physical and chemical phenomena inside the cell are included, especially the mass transfer of hydrogen, oxygen, vapor and liquid water in gas channels, gas diffusion layer and catalyst layer and
Wang, Xuhui, Lu, Yikang, Zhang, Baitao, Xu, Sichuan
Control Strategies for Prevention of PEMFC Oxygen Starvation: A Review2021-01-07434/6/2021
Proton Exchange Membrane Fuel Cell (PEMFC) which has advantages of starting fast, high energy density, high efficiency, lower operating temperature and little pollution is widely regarded as one of the most promising energy sources. The PEMFC system includes several subsystems such as air supply subsystem, hydrogen supply subsystem, thermal management subsystem, water management subsystem, energy management subsystem and so on. The Air supply subsystem has great influence on the performance and life of PEMFC stack. Whether oxygen supply in air supply subsystem is sufficient or not will affects reaction rate of fuel, the operating temperature and degradation of PEMFC stack and so on. To solve the issue of oxygen starvation in PEMFC stack, the control strategies for improving dynamic response and preventing air shortage of the PEMFC air supply subsystem are reviewed. In this paper, the traditional proportional integral differential control, model predictive control, self-adaptive control
Gong, Dapeng, Xu, Sichuan, Zhang, Baitao
FITTING, PORT PLUG AND BLEEDERAS5169C (Historical)2/1/2021
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
New Method Makes Computer Memory from Titanium OxideTBMG-383401/1/2021
A team has developed a method to imbue computer chips that power machine-learning applications with more processing power by using a common material found in house paint in an analog memory device that enables highly energy-efficient machine inference operations. The material, titanium oxide, is a commonly made material used in house paint. It is an oxide, which means it already contains oxygen. Subtracting some of the oxygen creates oxygen vacancies that make the material electrically conductive. Those oxygen vacancies can now store electrical data, giving almost any device more computing power.
Generating Renewable Hydrogen Fuel from the SeaTBMG-383581/1/2021
Researchers have integrated water purification technology into a new proof-of-concept design for a sea water electrolyzer that uses an electric current to split apart the hydrogen and oxygen in water molecules. This new method for “sea water splitting” could make it easier to turn wind and solar energy into a storable and portable fuel.
Diamond-Studded Silk Wound Dressing Detects Infection and Improves HealingTBMG-3815912/1/2020
RMIT University Melbourne, Australia
Electronics Mimic the Human Brain in Biological LearningTBMG-3782810/1/2020
Researchers have discovered, while investigating protein nanowires, how to use these biological, electricity-conducting filaments to make a neuromorphic memristor or “memory transistor” device. It runs extremely efficiently on very low power, as brains do, to carry signals between neurons.
Terminology for Titanium MicrostructuresAS1814F (Current)7/16/2020
This list of terms, with accompanying photomicrographs where appropriate, is intended as a guide for use in the preparation of material specifications.
AMS G Titanium and Refractory Metals Committee
Lubricants for Oxygen UseAIR4071A (Current)7/14/2020
This SAE Aerospace Information Report (AIR) describes two classes of lubricants which, when properly applied, can be used in oxygen systems and components.
A-10 Aircraft Oxygen Equipment Committee
Q&A: Underwater Smart Glue Turns On and OffTBMG-372177/1/2020
Bruce Lee, Associate Professor of Biomedical Engineering at Michigan Technological University, and his team have developed a process whereby an adhesive can be deactivated by applying a small voltage.
New High-Flow Valve for Portable Oxygen Concentrator SystemsTBMG-372487/1/2020
Battery-powered, highly portable oxygen concentrators are a growing trend in patient mobility, enabling more and more oxygen-dependent patients to leave behind bulky home oxygen concentrator systems; larger, older “portable” concentrators; or oxygen tanks for hours at a time. But creating and building devices with high oxygen capacity in a size and weight easily managed by an oxygen-dependent individual remains a major engineering challenge.
Steel, Bars and Forgings 2.0Cr - 10Ni - 8.0Co - 1.0Mo (0.10 - 0.14C) (HY-180) Double Vacuum Melted Solution Heat Treated, Marage HardenableAMS6543G (Current)6/29/2020
This specification covers a premium aircraft-quality maraging steel in the form of bars 0.50 inch (12.7 mm) and over in nominal diameter or least distance between parallel sides, forgings, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Steel, Bars and Forgings 2.0Cr - 10Ni - 8.0Co - 1.0Mo (0.10 - 0.14C) (HY-180) Double Vacuum Melted Solution Heat Treated, Marage HardenableAMS6543G-TEST-REC (Historical)6/29/2020
This specification covers a premium aircraft-quality maraging steel in the form of bars 0.50 inch (12.7 mm) and over in nominal diameter or least distance between parallel sides, forgings, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Scaling Low-Cost Carbon Fiber Production with Oxidation TechnologyTBMG-371106/1/2020
Few materials used in manufacturing today are as versatile and desirable in performance applications as carbon fiber. Also known as graphite fiber and carbon graphite, carbon fiber is made up of thin strands of carbon that vary in diameter from four to ten microns, dependent on manufacturer and use. Do not let the size of these fibers fool you. Carbon fiber is regarded as one of the lightest and strongest materials on Earth. Compared to a unit of steel, carbon fiber is up to ten times stronger, two times stiffer, and 66% lighter.
Aluminum Alloy Powder 10.0Si - 0.35MgAMS7018 (Current)5/11/2020
This specification covers an aluminum alloy in the form of pre-alloyed powder.
AMS AM Additive Manufacturing Metals
Aluminum Alloy Powder 10.0Si - 0.35MgAMS7018-TEST-REC (Historical)5/11/2020
This specification covers an aluminum alloy in the form of pre-alloyed powder.
AMS AM Additive Manufacturing Metals
Iron Nanorobots Destroy Cancer CellsTBMG-362383/1/2020
Drug-coated iron nanowires that can be guided to the site of a tumor using an external magnetic field before activating a three-step cancer-killing mechanism could provide an effective option for cancer therapy.
Leading Women in Engineering & Science: Yolita Wildman Nugent, Director, Advanced Soft Systems Integration, FlexTBMG-362503/1/2020
Color-Changing Bandages Sense and Treat Bacterial InfectionsTBMG-362533/1/2020
According to the World Health Organization, antibiotic resistance is one of the biggest threats to global health. Sensing and treating bacterial infections earlier could help improve patients’ recovery, as well curb the spread of antibiotic-resistant microbes. Now, researchers reporting in ACS Central Science have developed color-changing bandages that can sense drug-resistant and drug-sensitive bacteria in wounds and treat them accordingly.
Liquid Flow Influenced by a Quantum Effect in WaterTBMG-360282/1/2020
Water is the basis of all life on earth. Its structure is simple — two hydrogen atoms bound to one oxygen atom — yet its behavior is unique among liquids, and scientists still do not fully understand the origins of its distinctive properties.
Evaluation of the Effects of Hydrogen Peroxide on Common Aircraft Electrical MaterialsTBMG-360582/1/2020
Among all of the large-scale disinfection and/or decontamination technologies available, vaporized hydrogen peroxide (VHP®) is of particular interest due to its rapid sterilization, easy usage, intrinsic environmental friendliness (i.e. simple by-products composed of only water and oxygen), and compatibility with many materials and systems.
Process Synthesizes Carbon Nanotubes Using Carbon DioxideTBMG-359612/1/2020
Carbon nanotubes are supermaterials that can be stronger than steel and more conductive than copper. The reason they're not in every application from batteries to tires is that these properties only show up in the tiniest nanotubes, which are extremely expensive. A new process was developed that can make these materials from carbon dioxide drawn from the air, in a way that is much less expensive than other methods. These materials could impact how emissions can be used in future technology.
Breathable Electronic Skin Using Nanofiber SubstrateTBMG-358071/1/2020
Wearable electronic devices for health monitoring using electronic skin have emerged but most electronic skin-related technologies utilize materials such as plastic or rubber that can cause skin irritation or interfere with metabolism when attached to skin or biological tissue.
Superconductivity in a Nickel Oxide MaterialTBMG-3568912/1/2019
Scientists have made the first nickel oxide material that shows clear signs of superconductivity — the ability to transmit electrical current with no loss. Also known as a nickelate, it's the first unconventional superconductor that is very similar to copper oxides, or cuprates, which indicated that superconductors could someday operate at near-room-temperature and revolutionize electronic devices, power transmission, and other technologies. Those similarities may show that nickelates could also superconduct at relatively high temperatures.
Potassium-Oxygen Battery Stores Clean EnergyTBMG-3569212/1/2019
Researchers have developed a more efficient, more reliable potassium-oxygen battery with a cathode that stores the energy produced by a chemical reaction in a metal-oxygen or metal-air battery. The battery could make renewable energy sources like solar and wind more viable options for the power grid through cheaper, more efficient energy storage.
Precipitation Hardenable Steel Alloy, Corrosion and Heat-Resistant Powder for Additive Manufacturing 16.0Cr - 4.0Ni - 4.0Cu - 0.30NbAMS7012 (Current)11/14/2019
This specification covers a corrosion and heat-resistant steel alloy in the form of pre-alloyed powder.
AMS AM Additive Manufacturing Metals
Thin Nylon Films for Transparent Electronic DevicesTBMG-3525510/1/2019
Very thin nylon films were created that can be used in electronic memory components. The films are several hundreds of times thinner than a human hair and could be used in bendable electronic devices or for electronics in clothing.
Invisible Tags Write, Read, and Erase Using LightTBMG-3526910/1/2019
A method was developed that enables information to be contained in simple plastic foils with a thickness of less than 50 μm, which is thinner than a human hair. Organic luminescent molecules are introduced into the transparent plastic foils. In the beginning, these molecules are in an inactive, dark state; by locally using ultraviolet irradiation, it is possible to turn this dark state into an active, luminescent one.
Wristbands Do Health Check During WorkoutTBMG-345646/1/2019
Next-generation fitness sensors could give deeper insights into human health through noninvasive testing of bodily fluids. A stretchy patch developed at KAUST could help this approach by making it easier to analyze sweat for critical biomarkers.
Graphene Coating Takes Oxygen Out of Lithium Battery FiresTBMG-346016/1/2019
Lithium batteries allow electric vehicles to travel several hundred miles on one charge. Their capacity for energy storage is well known — so is their tendency to occasionally catch on fire. This “thermal runaway” occurs most frequently when the batteries overheat or cycle rapidly.
Material Property Characterization for Low Pressure Carburization Process Design using Computer ModelingF-0075-2019-146805/13/2019
Low Pressure Carburization (LPC) is widely used in the aerospace industry for hardening components made of steels with high alloy content and high heat resistant properties. The traditional gas carburizing process often generates Intergranular Oxidation (IGO) near the surface due to the existence of oxygen in the furnace atmosphere, which needs to be removed by grinding after hardening to restore bending and contact fatigue performance. LPC processing is done in a low pressure chamber without the existence of oxygen, so the surface microstructure is improved by eliminating IGO. High temperature resistant steels require high alloy element contents, and some elements are strong carbide formers, such as Cr, Mn, Mo, and V, etc. During LPC processing, both iron and alloy carbides can be formed, which significantly affect the carburization time required to reach a specified case depth and surface carbon. The carbides formed during the LPC process may not decompose completely prior to quench
Li, Zhichao, Fetty, Jason, Sims, Justin, Ferguson, Lynn, Baker, Treven
Designs to Dye for: Autonomy's New-Materials Revolution19AVEP05_055/1/2019
From pineapples to bacteria, Envisage's research is focused on new mobility's ‘inside’ story. Evolving vehicle engineering constantly reshapes vehicle architectures. But along with electrified drive-trains and autonomous capabilities is the need for a mindset shift in materials, opening the way for new sustainable solutions in color, materials and finish (CMF). Future cabins could have pineapple, banana, coconut and eucalyptus among the material solutions-with bacteria playing a potentially positive role. All these sources are at play for research designer Sammie Mayers-Nissen and her colleagues at Envisage, the U.K.-based specialist engineering services provider helping to find sustainable alternatives to plastic, leather and harmful dyes that still meet quality, durability and cost demands. “As always, in terms of R&D of alternative materials and color, production-cost consideration is the massive driver, with performance very close behind,” said Mayers-Nissen.
Birch, Stuart
FITTING, PORT PLUG AND BLEEDERAS5169B (Historical)3/28/2019
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Nickel Alloy, Corrosion and Heat-Resistant, Powder for Additive Manufacturing, 47.5Ni - 22Cr - 1.5Co - 9.0Mo - 0.60W - 18.5FeAMS7008 (Current)3/26/2019
This specification covers a corrosion and heat-resistant nickel alloy in the form of pre-alloyed powder.
AMS AM Additive Manufacturing Metals
Nickel Alloy, Corrosion and Heat-Resistant, Powder for Additive Manufacturing, 60Ni - 22Cr - 2.0Mo - 14W - 0.35Al - 0.03LaAMS7013 (Current)1/3/2019
The intended upper bound of this specification is that the particle size distribution (PSD) of powders supplied shall be <60 mesh (250 µm) and that no powder (0.0 wt.%) greater than 40 mesh (425 µm) is allowed.
AMS AM Additive Manufacturing Metals
New Catalyst for Plastic Production Also Creates HydrogenTBMG-3339012/1/2018
Researchers have developed a new, low-cost catalyst for plastic production that turns a biorefinery product into a starting material for the synthesis of plastics, which could represent a sustainable alternative to widespread PET. At the same time, hydrogen can also be formed during the reaction.
Electronic Capsule Measures Gases in the GutTBMG-3324311/1/2018
An electronic capsule that measures gases in the gut to revolutionize the diagnosis of gut disorders could be available within four years, following an agreement between RMIT and Atmo Biosciences.
“Soft Hardware” Cloth Has Built-In Electronic DevicesTBMG-3311310/1/2018
Optical fibers have been traditionally produced by making a cylindrical object called a preform — essentially, a scaled-up model of the fiber — and then heating it. Softened material is then drawn or pulled downward under tension and the resulting fiber is collected on a spool.
Numerical Investigation on Effects of Combustion Chamber Structure and Oxygen Enriched Air on Combustion and Emission Characteristics of Marine Diesel Engine2018-01-17869/10/2018
In order to improve the combustion and emissions for high-speed marine diesel engines, numerical investigations on effects of different combustion chamber structures combined with oxygen enriched air have to be conducted. The study uses AVL Fire code to establish three-dimensional combustion model and simulate the in-cylinder flow, air-fuel mixing and combustion process with the flow dynamics metrics such as swirl number and uniformity index, analyze the interactional effects of combustion chamber structures and oxygen enriched air against the experimental data for a part load operation at 1350 r/min, find the optimized way to improve engine performance as well as decrease the NOx and soot emissions. The novelty is that this study is to combine different oxygen concentration with different combustion chamber structures including the re-entrant chamber, the straight chamber and the open chamber. Results show that the chamber diameter, bowl depth, oxygen enrichment can greatly influence
Zhao, Changpu, Huang, Sirui, Wang, Ke
Comparing Large Eddy Simulation of a Reacting Fuel Spray with Measured Quantitative Flame Parameters2018-01-17209/10/2018
In order to reduce engine out CO2 emissions, it is a main subject to find new alternative fuels from renewable sources. For identifying the specification of an optimized fuel for engine combustion, it is essential to understand the details of combustion and pollutant formation. For obtaining a better understanding of the flame behavior, dynamic structure large eddy simulations are a method of choice. In the investigation presented in this paper, an n-heptane spray flame is simulated under engine relevant conditions starting at a pressure of 50 bar and a temperature of 800 K. Measurements are conducted at a high-pressure vessel with the same conditions. Liquid penetration length is measured with Mie-Scatterlight, gaseous penetration length with Shadowgraphy and lift-off length as well as ignition delay with OH*-Radiation. In addition to these global high-speed measurement techniques, detailed spectroscopic laser measurements are conducted at the n-heptane flame. Spontaneous Raman
Ottenwaelder, Tamara, Pischinger, Stefan
Molybdenum Alloy Bars 0.48Ti - 0.09Zr - 0.02C Arc Cast, Stress RelievedAMS7819E (Current)8/14/2018
This specification covers an arc-cast molybdenum alloy in the form of round bars 0.125 to 4.5 inches (3.00 to 112.50 mm), inclusive.
AMS G Titanium and Refractory Metals Committee
Molybdenum Alloy Bars 0.48Ti - 0.09Zr - 0.02C Arc Cast, Stress RelievedAMS7819E-TEST-REC (Historical)8/14/2018
This specification covers an arc-cast molybdenum alloy in the form of round bars 0.125 to 4.5 inches (3.00 to 112.50 mm), inclusive.
AMS G Titanium and Refractory Metals Committee
Titanium Alloy, Sheet 6Al - 2Sn - 2Zr - 2Mo - 2Cr - 0.15Si AnnealedAMS4898E (Historical)8/8/2018
This specification covers a titanium alloy in the form of sheet in nominal thicknesses 0.016 through 0.1874 inch (0.41 through 4.760 mm).
AMS G Titanium and Refractory Metals Committee
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