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Showing 1 to 20 of 49 for “"Air supply"”.
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Design and Development of an Air Supply System for an Unmanned Circulation Control Aerial Vehicle
… are increasing in number and effectiveness as aircraft, sensor and automation technologies mature. Since the demand for UAV platforms capable of performing multiple missions with enhanced performance is increasing, technologies as Circulation Control (CC), which is an active flow control …
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Implementation of an Air Supply Unit Control Scheme for the UC2AV (Unmanned Circulation Control Aerial Vehicle)
… platforms provide in comparison to larger aircraft. Despite the versatility of unmanned aviation, limitations on payload size and weight, fuel and power capacity, and takeoff and landing infrastructure can restrict UAV applications, and have created a need for lift augmenting technologies …
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Quantifying Air Distribution, Ventilation Effectiveness and Airborne Pollutant Transport in an Aircraft Cabin Mockup
… during flight inspired this research into cabin air quality, which is closely related to its airflow distribution, ventilation effectiveness and airborne pollutant transport. The experimental facility is a full-scale aircraft cabin mockup. A volumetric particle tracking velocimetry (VPTV) …
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Small-Scale Batch-Fed Biomass Gasification and Combustion
… products is achieved through a staged process. Air staging may be performed by providing a limited amount of primary air from below and secondary air downstream of the solid fuel bed. When lit from the top of the fuel bed this is called a reverse downdraft process. The air supply has a major …
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Numerical Simulation of Mode Transition in a Hydrogen-Fueled Scramjet
… between one set with a clean (non-vitiated) air supply and the other set with a vitiated air supply (12% H<sub>2</sub>O vapor). The Peters and Rogg hydrogen-air chemical kinetics model was selected for the scramjet simulations. A limited sensitivity study was done to investigate the choice of …
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Pneumatic Particulate Collection System for an Unmanned Ground Sampling Robot
… kinetic energy from the release of compressed air to transport the particulate to a collection chamber. Consideration is given to the drop in pressure of the air supply tank as it empties, and a feasible air supply tank design is presented. Two forms of particulate collection are investigated …
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Effects of indoor air quality on the occupant's health and productivity in an office building
Indoor Air Quality (IAQ) is an important parameter in deciding the status of Sick Bulding Syndrome (SBS). Poor IAQ which leads to SBS can result in adverse effect on the health of the occupant which causing lower productivity. This study was conducted to establish correlation between IAQ and …
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Jet oscillation applied for aircraft cabin ventilation using active flow control actuators
… flight relies on continual extraction of fresh air from the engine. To meet passengers' expectation for more comfortable cabin which requires improved air supply and address the ever critical energy and emissions concerns, novel air delivery methods inside the cabin are desired and, therefore, …
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Air jet vortex generators for wind turbines
Air jet vortex generators are a boundary layer control device and as such can effect a significant delay to the stall of an aerofoil. They can also reattach a separated flow, as long as the angle of attack is less than the air jets 'on' stall angle. A wind tunnel model was built and tested and then …
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Numerical Simulation of UVA Ramjet/Scramjet Hypersonic Engine with Hydrogen-Air Combustion Using Wind-US
… into the flowfield behavior. Four hydrogen-air reaction mechanisms were initially assessed using the Burrows-Kurkov case. An Evans-Schexnayder, 7-specie, 8-reaction set with third body efficiencies was then selected for the scramjet simulations. The scramjet simulations included one fuel-off …
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'No-touch' breast-implant insertion device
… method with: (a) pressurized air as the insertion 'force', (b) an inverting-bag (partially inserted with the implant) to eliminate direct glove/implant contact, and (c) a built-in retractor with a breast-cavity air-removal path to reduce implant insertion resistance due to …
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The effect of negligence and misadjustment on the automotive engine
… engine's operation were: (1) restriction of the air supply to the carburetor; (2) restriction of the flow of exhaust products from the engine; (3) a change in the carburetor float level; (4) a variation of the ignition timing within five degrees of that recommended; (5) the use of spark plugs …
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Design of a prototyping press for 3-d monolithic compliant mechanisms
… average rate. It is powered by a compressed air supply at up to 100 psi and motion is controlled by a single electrical solenoid shut-off valve.
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Patient Room Design that Integrates the Personalized Ventilation System for Cross-Infection Control
Many airborne diseases such as Coronavirus variants are spread from person to person by indoor air movement. This is of particular concern in healthcare environments such as hospitals. There is a significant body of research that suggests that indoor ventilation strategies such as personalized …
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Dynamic Botanical Filtration System for Indoor Air Purification
<p>A dynamic botanical air filtration (DBAF) system was developed, tested and modeled for indoor air purification. The DBAF system consisted of an activated-carbon/hydroculture-based root bed for potted-plant, a fan for driving air through the root bed for purification, and an irrigation system for …
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'Reparatur abgeplatzter Verblendungen durch intraorale Silikatisierung - eine In-vivo-Studie'
The repair of fractured ceramic veneers by intraoral silica coating was examined at 42 patients with altogether 60 ceramic-fused-to-metal crowns and bridges regarding their clinical applicability. A hand jet device (ERC Microetcher, Danville engineering Inc., Danville, Virginia, the USA) attached …
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Design and modeling of a third generation slumping tool for X-ray telescope mirrors/
… sheets of glass using porous mandrels as air bearings developed at the Space Nanotechnology Lab. This method, a second generation slumping tool, eliminates the problems of sticking and dust particle-induced distortion that plague traditional slumping methods. A detailed mathematical model …
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A dynamic optimal control system for complex compressed air networks
Mines use large compressed air networks to supply shafts and processing plants with compressed air. These networks can be complex where multiple compressors are located at different locations. To add to the complexity of the network, each end user of compressed air is a separate business entity - …
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A DEVICE FOR ASSESSING INTRACRANIAL PRESSURES
… results to date is presented. A transducer, an air pump, a pressure gage, an automatic control system, and memory with visual read-out, are the basic parts of the system. The transducer is a closed-end, fluid filled device which operates on a true applanation principle. The air supply for the …
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