Browse Topic: Marine vehicles and equipment
This SAE Recommended Practice establishes recommended procedures for the issuance, assignment, and structure of Identification Numbers on a uniform basis by states or provinces for use in an Assigned Identification Number (AIN).
Nowadays, the energy transition is at the most critical moment. In order to achieve the emission reduction target of ships, a form of boosting piston inside methanol fuel injector has been carried out. The physical property fluctuations and phase change of methanol under high pressure have been considered in the design phase. 1D-3D coupling method is used to comprehensively evaluate the performace of the injector. To this end, an Amesim simulation model is established to systematically study and analyze the injection characteristics. The injection performance of the injector under four typical loads are calculated, which is evaluated from the perspectives of injection quantity, injection duration, valve response, and leakage of boost components. In the nozzle block, the cavitation intensity of methanol is stronger than that of diesel. To reduce the possibility of cavitation erosion, as a consequence, a CFD model is established to optimize the structure of nozzle components. By adding
Shipbuilders didn’t have the option of fiberglass when the nonprofit American Bureau of Shipping (ABS) was established 160 years ago to help safeguard life and property on the seas. Fortunately, technology to help better ensure the safety of ocean vessels has also come a long way in that time, in part because people have become a spacefaring species.
Northrop Grumman San Diego, CA jacqueline.rainey@ngc.com
Measuring fluid mass in microgravity, where fluid behavior is dominated by fluid properties, is a challenging problem. To address this problem engineers at NASA are developing a capacitance-based, mass-fraction gauge for vessels containing two-phase fluids. The vessel volume is enclosed with an array of electrodes, and a unique set of capacitance measurements of the enclosed volume are made between the electrodes. The capacitance measurements are scaled with appropriate weighting factors derived from Laplace’s Equation to compensate for the highly non-uniform electric fields inside the measurement volume and achieve a greater level of mass fraction accuracy.
Curtiss-Wright Corporation Davidson, NC info@curtisswright.com
The scope of this SAE Recommended Practice is limited to cranes mounted on a fixed platform lifting loads from a vessel alongside. The size of the vessel is assumed not to exceed that of a work boat as defined in 3.14.
MIT researchers have developed a battery-free, self-powered sensor that can harvest energy from its environment. Because it requires no battery that must be recharged or replaced, and because it requires no special wiring, such a sensor could be embedded in a hard-to-reach place, like inside the inner workings of a ship’s engine. There, it could automatically gather data on the machine’s power consumption and operations for long periods of time.
This SAE Recommended Practice specifies graphic symbols for operator controls, gauges, tell-tales, indicators, instructions, and warning against risks in small craft and for engines and other equipment intended to be used in small craft.
Defense Innovation Unit Washington D.C. info@DIU.mil
MIT engineers aim to produce totally green, carbon-free hydrogen fuel with a new, train-like system of reactors that is driven solely by the sun. In a study appearing Solar Energy Journal, the engineers lay out the conceptual design for a system that can efficiently produce “solar thermochemical hydrogen.” The system harnesses the sun's heat to directly split water and generate hydrogen — a clean fuel that can power long-distance trucks, ships, and planes, while in the process emitting no greenhouse gas emissions.
This SAE Standard establishes a uniform test procedure and performance requirement for limiting the maximum speed of a personal watercraft.
NASA engineers have developed a new approach to mitigating unwanted motion in floating structures. Ideally suited to applications including offshore wind energy platforms and barges, the innovation uses water ballast as a motion damping fluid.
This document defines a set of standard application layer interfaces called JAUS Mobility Services. JAUS Services provide the means for software entities in an unmanned system or system of unmanned systems to communicate and coordinate their activities. The Mobility Services represent the vehicle platform-independent capabilities commonly found across all domains and types of unmanned systems (referred to as UxVs). At present, over 15 services are defined in this document many of which were updated in this revision to support Unmanned Underwater Vehicles (UUVs). Some examples include: Pose Sensors: Determine the instantaneous position and orientation of a platform in global or local coordinates Velocity State Sensor: Determines the instantaneous velocity of a platform Acceleration State Sensor: Determines the instantaneous acceleration of a platform Primitive Driver: Performs basic mobility for a platform based on force/torque efforts Vector Drivers: Perform closed loop mobility for
Yanmar has announced that its marine subsidiary, Yanmar Holdings, is now offering a marine-grade hydrogen fuel cell propulsion system. According to the company's announcement of the system's availability, the system is suited for use in various oceangoing vessels including passenger ships, work ships, and cargo ships operating in coastal areas where hydrogen refueling is relatively accessible. Yanmar states that due to the International Maritime Organization's (IMO) revised target of achieving zero net greenhouse gas (GHG) emissions by 2050, the marine propulsion industry is robustly pursuing all decarbonization efforts.
An extensive evaluation of the Deep Image Prior (DIP) technique for image inpainting on Synthetic Aperture Radar (SAR) images. Air Force Research Laboratory, Wright Patterson Air Force Base, OH Synthetic Aperture Radar (SAR) images are a powerful tool for studying the Earth's surface. They are radar signals generated by an imaging system mounted on a platform such as an aircraft or satellite. As the platform moves, the system emits sequentially high-power electromagnetic waves through its antenna. The waves are then reflected by the Earth's surface, re-captured by the antenna, and finally processed to create detailed images of the terrain below. SAR images are employed in a wide variety of applications. Indeed, as the waves hit different objects, their phase and amplitude are modified according to the objects' characteristics (e.g., permittivity, roughness, geometry, etc.). The collected signal provides highly detailed information about the shape and elevation of the Earth's surface
This SAE Recommended Practice establishes uniform requirements and guidelines for the display of capacity information of personal watercraft.
After decades of tantalizing breakthroughs in battery technology, the last decade witnessed the emergence of energy storage as a challenger to fossil fuels for powering vehicles. We are now in the midst of a once-in-a-lifetime opportunity to change the energy landscape and electrify all forms of transportation: light duty passenger cars, heavy duty commercial vehicles, as well as various forms of transportation such as trains, ships, and aircraft.
BAE Systems, Inc. Arlington, VA 571-488-0456
Aurora Flight Sciences, a Boeing Company Manassas, VA 703-369-3633
Winds racing across the North Sea often wreak havoc among vessels in the 600-mile waterway. While its many islands and sandy beaches make it a popular vacation spot, the North Sea is often rough and stormy. In April, nine nations signed a pact to expand wind farms in the North Sea by eight times from its current level.
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