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Videos search results: "Experimental"
 
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Title          
Influence of a Streamwise Pressure Gradient o... 
   
 
Abstract    

In this video, Kiran Dellimore gives a broad overview of his research paper entitled  'Influence of a Streamwise Pressure Gradient on Film-Cooling Effectiveness' published in the JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER,Vol. 23, No. 1, January-March 2009. His co-authors are Carlos Cruz, Andre W. Marshall, and Christopher P. Cadou all from the University of Maryland, College Park, Maryland 20742.

The paper may be accessed using the following DOI: 10.2514/1.35717

Film cooling is widely used in conventional gas turbine and rocket engines to minimize thermal loading of engine structures and to manage heat transfer between hot, reacting gases and cooler structural components. Previous experimental work has shown that streamwise pressure gradients strongly influence the performance of the film.This paper extends semi-empirical modeling ideas for wall-jet film cooling to include the effects of adverse and favorable pressure gradients. The extended model shows that a pressure gradient’s effect on cooling performance depends on whether the velocity of the film is greater than the core flow (a wall-jet...

 
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Added By - kdellimo
Subject - Aeronautics and Astronautics
Document Type - Journal Paper Discussion
Video Duration - 00:05:20
 
 
 

 

Title          
Smoke flow visualization over an Airfoil 
   
 
Abstract    

In general, flow visualization is an experimental means of examining the flow pattern around a body or over its surface. The flow is "visualized" by introducing dye, smoke or pigment to the flow in the area under investigation. The primary advantage of such a method is the ability to provide a description of a flow over a model without complicated data reduction and analysis.

(Detalis taken from Department of Aerospace and Ocean Engineering,Virginia Polytechnic Institute and State University, Blacksburg, VA)

 
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Added By - justin
Subject - Aeronautics and Astronautics
Document Type - Experiments
Video Duration - 00:00:30
 
 
 

 

Title          
Fish Inspired Wind Turbines 
   
 
Abstract    
Excerpt from http://www.caltech.edu/article/13430 "The power output of wind farms can be increased by an order of magnitude—at least tenfold—simply by optimizing the placement of turbines on a given plot of land, say researchers at the California Institute of Technology (Caltech) who have been conducting a unique field study at an experimental two-acre wind farm in northern Los Angeles County. A paper describing the findings—the results of field tests conducted by John Dabiri, Caltech professor of aeronautics and bioengineering, and colleagues during the summer of 2010—appears in the July issue of the Journal of Renewable and Sustainable Energy."
 
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Added By - A Ghosh
Subject - Bioengineering
Document Type - Documentary
Video Duration - moderate
 
 
 

 

Title          
Cavitation in Microgravity (Full Movie) 
   
 
Abstract    
Hydrodynamic cavitation inside a freefloating water drop produced in microgravity. (Credits: ESA, Danail Obreschkow, Philippe Kobe Hydrodynamic cavitation inside a freefloating water drop produced in microgravity. (Credits: ESA, Danail Obreschkow, Philippe Kobel, Nicolas Dorsaz, Aurèle de Bosset, Mohamed Farhat)
 
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Added By - matlabuser
Subject - Aeronautics and Astronautics
Document Type - Experiments
Video Duration - 00:02:58
 
 
 

 

Title          
Flow Visualization: Aerodynamics of Truck vs.... 
   
 
Abstract    

A video showing the flow of dye over and through a Nascar and Truck illustrating fluid mechanics and aerodynamics. In fluid dynamics it is critically important to see the patterns produced by flowing fluids, in order to understand them. We can appreciate this on several levels: Most fluids (air, water, etc.) are transparent, thus their flow patterns are invisible to us without some special methods to make them visible.On another level, we know the governing equations of fluid motion (the Navier-Stokes equations), but they are nonlinear partial differential equations with very few general solutions of practical utility. We can solve them numerically with modern computer methods, but these solutions may not correspond to ...

 
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Added By - justin
Subject - Aeronautics and Astronautics
Document Type - Experiments
Video Duration - 00:04:45
 
 
 

 

Title          
Doppler Effect 
   
 
Abstract    

The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842, is the change in frequency of a wave for an observer moving relative to the source of the waves. It is commonly heard when a vehicle sounding a siren approaches, passes and recedes from an observer. The received frequency is higher (compared to the emitted frequency) during the approach, it is identical at the instant of passing by, and it is lower during the recession. For waves that propagate in a medium, such as sound waves, the velocity of the observer and of the source are relative to the medium in which the waves are transmitted. The total Doppler effect may therefore result from motion of the source, motion of the observer, or moti...

 
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Added By - reberg
Subject - Physics
Document Type - Demonstration
Video Duration - 00:02:59
 
 
 

 

Title          
3.5 miles in 10 seconds 
   
 
Abstract    
Born in Berkeley, California, Crossfield grew up in California and Washington. He served with the U.S. Navy as a flight instructor and fighter pilot during World War II. From 1946-1950, he worked in the University of Washington's Kirsten Wind Tunnel while earning his bachelor's(1949) and master's degrees(1950) in aeronautical engineering. In 1950, he joined the National Advisory Committee for Aeronautics' High-Speed Flight Station (now the NASA Dryden Flight Research Center) at Edwards Air Force Base, California, as an aeronautical research pilot. In those early days, it was called Muroc Field, reverse spelling of the wealthy California Corum family who donated the land to the Army Air Corps. Crossfield joined the Navy because he could enter flight training two weeks earlier than a date offered by the Army Air Corps.

Crossfield demonstrated his flight test skills on his very first student solo. His instructor was not available on the designated early morning, so Crossfield, on his own, took off and went through maneuvers he had practiced with his instructor, to include spin entry and spin recovery. During the first spin, Crossfield experienced vibrations, banging, and noise in the aircraft that he had never encountere...
 
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Added By - 123456
Subject - Aeronautics and Astronautics
Document Type - Profile
Video Duration - 00:00:02
 
 
 

 

Title          
IBM Research Computational Biology Center  
   
 
Abstract    

Computational biology is an interdisciplinary field that applies the techniques of computer science, applied mathematics and statistics to address biological problems. The main focus lies in the development of computational and statistical data analysis methods and in developing mathematical modeling and computational simulation techniques. By these means it addresses scientific research topics with their theoretical and experimental questions without a laboratory. It is connected to the following fields: (1) Computational biomodeling, a field concerned with building computer models of biological systems.(2)  

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Added By - autocrawler
Subject - Bioengineering
Document Type - Documentary
Video Duration - moderate
 
 
 

 

Title          
Stirling engine example 
   
 
Abstract    

This is intended as an example of how much power can be produced out of nothing but heat and air density, and how your car's engine has to overcome this.

Stirling's air engine (as it is referred to in early text books - see hot air engine history) was invented by Reverend Dr Robert Stirling and patented by him in 1816. When the name became simplified to Stirling engine is not known, but may be as recently as the mid twentieth century when the Philips company began to experiment with working fluids other than air - the instruction book for their MP1002CA (see below) still refers to it as an 'air engine'. The main subject of that original patent was a heat exchanger which Stirling called the "economiser" for its enhancement of fuel economy in a variety of applications. The patent also described in detail the employment of one form of the economiser in an air engine, in which application ...

 
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Added By - quantum
Subject - Energy
Document Type - Demonstration
Video Duration - 00:02:05
 
 
 

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