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Model Testing - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect segment explaining how models are tested to create more efficient designs. The video explores the new X-33 engine and explains what engineers learn from scale models.

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Let's visit NASA's Stennis Space Center in Mississippi. 00:00:00
There, NASA scientists are testing engines to make the X-33 more efficient. 00:00:04
The difference between the linear aerospike engine and conventional engines is the shape of the nozzle. 00:00:11
Conventional engines have a nozzle that's shaped like a bell, 00:00:17
and the hot combusted gases expand along the inner surface of this bell. 00:00:20
However, with the aerospike engine, the nozzle is in the shape of a V called a ramp, 00:00:25
and the hot combusted gases expand along this outer surface. 00:00:31
This unusual design allows for a more efficient performance from the engine 00:00:35
and a more optimal vehicle design. 00:00:41
Once all the information is gathered from the various tests, it comes time to put the data to use. 00:00:44
Music 00:00:50
How do engineers use their models to test their ideas? 00:00:59
What can you learn from a scale model? 00:01:04
Jennifer and Ben, welcome to the Skunk Works in Palmdale, California. 00:01:07
This is the location where we build the X-33 vehicle. 00:01:11
You can see some of the parts of the X-33 behind me. 00:01:14
That's the vertical stabilizer. 00:01:17
Those parts are mounted in the back of the vehicle to keep it steady during its flight. 00:01:19
And you can see it mounted here on this scale model. 00:01:24
This model is used to evaluate the aerodynamics performance in a wind tunnel. 00:01:27
So it is built in exact proportions to the actual vehicle. 00:01:33
Now, the vehicle is under construction right here. 00:01:37
This is the X-33. 00:01:40
And it is also a proportionate vehicle. 00:01:42
It is proportional to a much larger vehicle called Venture Star. 00:01:44
Now, we've learned a lot from proportioning this vehicle. 00:01:48
We've already changed the design of Venture Star based on what we've learned in the proportioning exercise on X-33. 00:01:51
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Idioma/s:
en
Materias:
Matemáticas
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
372
Fecha:
28 de mayo de 2007 - 16:52
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
11.96 MBytes

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