uncleflo
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MIT OCW - 2.972 How a Hydrofoil Works
Saved by uncleflo on February 12th, 2022.
The rquirement is to lift the boat's hull outside the water. Hydrofoil (It is a foil or wing under water used to lift the boat's hull until it is totally outside the water.) Explanation: 1. At low speeds the hull (body of ship) sits in the water and the hydrofoils are totally submerged in the water. 2. As the boat's speed increases, the hydrofoils create lift. 3. At a certain speed, the lift produced by the hydrofoils equals the sum of of the boat and cargo weights. Therefore the hull comes out of the water. 4. Instead of having an increase in drag with increasing speed because the hull is lifted out of the water (contrary to what happens in traditional boats due to pressure drag), the hydrofoils provide a more efficient way of cruising. Decreasing the drag contributes to the better use of the power needed for the movement of the boat.
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An Introduction to the Physics of Sailing | MIT BLOSSOMS
Saved by uncleflo on January 20th, 2021.
The goal of this lesson is to explain how sailboats work by exploring basic physics principles. At the end of this lesson, students will be able to identify the forces acting on a sailboat and explain how the combination of these forces results in the forward motion of a sailboat. Students should be familiar with vectors and be able to use them to represent forces and moments, and also should be familiar with using free body diagrams to represent forces and moments. A basic understanding of fluid flow and/or resistance might be helpful, but not necessary. This lesson and the follow-on assessment will each take about one hour to complete. Students only need pen/pencil and paper to complete the activities in the lesson, although an optional activity where students make their own sailboats would require additional materials. The classroom activity challenges are centered around small-group discussions based on the questions posed before each break. Free body diagrams, or another conceptual representation of his or her answer, should support each student’s solution to the questions posed in the video. Instructions for the option of having students design their own sailboats as part of this lesson can be found here: https://tryengineering.org/teacher/sail-away/
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Lessons mechanical fluid loss software aeraulic hydraulic load aerodynamics hydrodynamics
Saved by uncleflo on December 28th, 2019.
Calculation of profiles lift and drag. (flux externes) Forces in aerodynamics and hydrodynamics Major head loss and pressure drop. (internal flows) The friction and turbulence in pipes Sizing pump or turbine in a fluids networks of aeraulic or hydraulic. power of a pump or a turbine The purpose of this site is to initiate providing software and tools ludic reflection, fast and applied to specific projects. By navigating through links with curiosity, you will develop a basic understanding of fluid mechanics that will serve you every day for your projects. As support, a software tool developed in a spirit of pedagogical simplification, brings together the basic tools to handle projects of fluid mechanics. This site provides support online software fluid mechanics:
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Air-Conditioning Hoses and Fittings - Tubes International
Saved by uncleflo on December 18th, 2019.
Cooling and air-conditioning installations utilize the change of cooling agent parameters (pressure, temperature and state) when it circulates between the evaporator and the condenser in the cooling system. The cooling agent circulates driven by the refrigerating compressor. The refrigerant absorbs heat by evaporation in the evaporator, then it gives up heat when vapour is condensed in the condenser. There are many types of refrigerants (water, carbon dioxide, ammonia), however there is one special type of low-boiling hydrocarbons, called freons. Flexible freon hoses are widely used in air-conditioning systems of various vehicles (cars, machinery, trains, trams) as well as in smaller installations of industrial cooling. In these installations, freon (e.g. R134a, R1234yf) mixed with compressor oil (e.g. PAG synthetic oil) acts as a refrigerant. It circulates in the system where it undergoes continuous pressure and temperature fluctuations. Therefore, requirements concerning freon hoses are so high. It is essential for the system to be perfectly tight as freon is very penetrating, expensive and harmful to the environment. It must be highly resistant to pressure, temperature, chemicals and stop humidity from permeating the hose wall. It concerns automotive air-conditioning in particular because there, the freon hose operates in the engine compartment, tightly packed and bent, in high ambient temperature conditions, exposed to vibrations and in contact with car fluids.
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SimScale - CFD, FEA, and Thermal Simulation in the Cloud | CAE
Saved by uncleflo on October 11th, 2019.
SimScale supports all standard 3D files so you can continue using the CAD system you are familiar with. Use the SimScale add-ons to make your workflow as simple as possible. Most simulation tools are complex and difficult to understand. SimScale uses a lean simulation workflow that guides you through the process step-by-step. And with the help of ready-to-use simulation templates, you never have to start from scratch.
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ANSYS Free Student Software Downloads
Saved by uncleflo on October 23rd, 2018.
ANSYS provides free student software products perfect for work done outside the classroom, such as homework, capstone projects, student competitions and more. Our renewable products can be downloaded by students across the globe. ANSYS Student products can be installed on any supported MS Windows 64-bit machine. Learn more about Discovery Live Student, ANSYS AIM Student and ANSYS Student so you can download them today.
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Ansys - Products - Fluids
Saved by uncleflo on October 23rd, 2018.
Computational Fluid Dynamics. Computational Fluid Dynamics (CFD) is a tool with amazing flexibility, accuracy and breadth of application. But serious CFD, the kind that provides insights to help you optimize your designs, could be out of reach unless you choose your software carefully. To get serious CFD results, you need serious software. ANSYS CFD goes beyond qualitative results to deliver accurate quantitative predictions of fluid interactions and trade-offs. These insights reveal unexpected opportunities for your product— opportunities that even experienced engineering analysts can otherwise miss. CFD simulation for every engineer. While ANSYS CFD empowers experienced analysts to deliver deep insights, serious CFD is not just for experts modeling rocket ships and racing cars. Engineers at every level across diverse industries are getting great value from CFD. The ANSYS Customer Excellence (ACE) team has seen and solved a vast array of CFD simulation challenges and are ready to help you solve yours. More CFD solutions. Go further and faster with well-validated CFD results across the widest range of general, specialty and multiphysics applications. ANSYS Fluent and ANSYS CFX provide fast results for virtually any fluid or multiphysics application, with industry-leading accuracy and robustness. This serious CFD software has the wide ranging capabilities needed to solve your design problems today and in the future. Solve complex fluid problems. Best-in-class CFD solvers extend the limits of what is possible so you can maximize your product’s performance and efficiency.
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On the Comparison of the Long Penetration Mode (LPM) Supersonic Counterflowing Jet to the Supersonic Screech Jet
Saved by uncleflo on December 7th, 2016.
The authors provide a brief overview of the classic tonal screech noise problem created by underexpanded supersonic jets, briefly describing the fluid dynamic-acoustics feedback mechanism that has been long established as the basis for this well-known aeroacoustics problem. This is followed by a description of the Long Penetration Mode (LPM) supersonic underexpanded counterflowing jet phenomenon which has been demonstrated in several wind tunnel tests and modeled in several computational fluid dynamics (CFD) simulations. The authors provide evidence from test and CFD analysis of LPM that indicates that acoustics feedback and fluid interaction seen in LPM are analogous to the aeroacoustics interactions seen in screech jets. Finally, the authors propose applying certain methodologies to LPM which have been developed and successfully demonstrated in the study of screech jets and mechanically induced excitation in fluid oscillators for decades. The authors conclude that the large body of work done on jet screech, other aeroacoustic phenomena, and fluid oscillators can have direct application to the study and applications of LPM counterflowing supersonic cold flow jets.
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On the Comparison of the Long Penetration Mode (LPM) Supersonic Counterflowing Jet
Saved by uncleflo on December 7th, 2016.
Classic tonal screech noise created by under-expanded supersonic jets; Long Penetration Mode (LPM) supersonic phenomenon -Under-expanded counter-flowing jet in supersonic free stream -Demonstrated in several wind tunnel tests -Modeled in several computational fluid dynamics (CFD) simulations; Discussion of LPM acoustics feedback and fluid interactions -Analogous to the aero-acoustics interactions seen in screech jets; Lessons Learned: Applying certain methodologies to LPM -Developed and successfully demonstrated in the study of screech jets -Discussion of mechanically induced excitation in fluid oscillators in general; Conclusions -Large body of work done on jet screech, other aero-acoustic phenomenacan have direct application to the study and applications of LPM cold flow jets. For the Oral/Visual Presentation in which this video was presented, please see the following link in the NASA Technical Reports Server (NTRS, http://ntrs.nasa.gov): http://hdl.handle.net/2060/20150016244
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Axis360 Pro - Cinetics
Saved by uncleflo on September 4th, 2016.
Axis360 is a motion control system that rotates and slides a camera. Axis360 is compact and light weight, sets up easily, and is extremely versatile. It moves at a wide range of speeds, fluidly or incrementally, and works with most DSLR, mirrorless, and cinema cameras. Axis360 is available in a variety of combinations to suit your needs.
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What is nuclear? / Molten Salt Reactors
Saved by uncleflo on February 26th, 2014.
Molten salt reactor schematic from GenIVMolten Salt Reactors (MSRs) are nuclear reactors that use a fluid fuel in the form of very hot fluoride or chloride salt instead of the solid fuel used in most reactors. Since the fuel salt is liquid, it can be both the fuel (producing the heat) and the coolant (transporting the heat to the power plant). There are many different types of MSRs, but the most talked about one is definitely the Liquid Fluoride Thorium Reactor (LFTR). This MSR has Thorium and Uranium dissolved in a fluoride salt and can get planet-scale amounts of energy out of our natural resources of Thorium minerals, much like a fast breeder can get large amounts of energy out of our Uranium minerals. There are also fast breeder fluoride MSRs that don’t use Th at all. And there are chloride salt based fast MSRs that are usually studied as nuclear waste-burners due to their extraordinary amount of very fast neutrons.
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Stirling engine - Wikipedia, the free encyclopedia
Saved by uncleflo on July 12th, 2013.
A Stirling engine is a heat engine operating by cyclic compression and expansion of air or other gas, the working fluid, at different temperature levels such that there is a net conversion of heat energy to mechanical work.[1][2] Or more specifically, a closed-cycle regenerative heat engine with a permanently gaseous working fluid, where closed-cycle is defined as a thermodynamic system in which the working fluid is permanently contained within the system, and regenerative describes the use of a specific type of internal heat exchanger and thermal store, known as the regenerator. It is the inclusion of a regenerator that differentiates the Stirling engine from other closed cycle hot air engines.
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Isotope
Saved by uncleflo on May 22nd, 2013.
Suppose that you wanted an interface of sortable, tiled information that was responsive enough to reorganize itself to fit in the available screen space? You might start out towards this goal filled with consternation, asking yourself: “how would I even start thinking about how to make such a complicated thing?” Well, the good news is that you don’t really have to, thanks to a jQuery plugin called Isotope developed by David DeSandro of Metafizzy. Take a look at the Isotope website and try resizing your browser window. Note that the tiles will reorganize themselves to fill in the available space.
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