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cnversion of velocity to pressure....

07/20/2007 11:49 AM

hello friend, is there any way to convert kinetic energy to pressure other than the use diffusers...

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Anonymous Poster
#1

Re: cnversion of velocity to pressure....

07/20/2007 1:05 PM

What is moving?

Gordie

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#5
In reply to #1

Re: cnversion of velocity to pressure....

07/21/2007 4:37 AM

hi,take the moving element as air...

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Anonymous Poster
#2

Re: cnversion of velocity to pressure....

07/20/2007 4:31 PM

Is my understanding wrong? Whatever the thing moving bumps up against is going to feel presure at the bimped spot?

Is that not a direct conversion of one form of energy to another?

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#3

Re: cnversion of velocity to pressure....

07/20/2007 4:36 PM

What are you trying to do? Are you looking for a unit conversion, or are you looking for a particular type of device that converts kinetic energy into pressure? Answering these questions will probably generate more questions, but that is sometimes necessary to determine the details of the situation.

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#6
In reply to #3

Re: cnversion of velocity to pressure....

07/21/2007 4:39 AM

i want the device which converts kinetic energy to pressure.......

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#4

Re: conversion of velocity to pressure....

07/21/2007 1:16 AM

My be you need to know how we convert the wind velocity at different levels above the ground to wind pressure to calculate the forces affecting on the structures. Is that your question?

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#7
In reply to #4

Re: conversion of velocity to pressure....

07/21/2007 4:41 AM

yes some what it relates...

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#8
In reply to #7

Re: conversion of velocity to pressure....

07/21/2007 3:21 PM

what are you trying to pressurize? fluid 0r gas

What form of kinetic energy

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#9

Re: cnversion of velocity to pressure....

07/22/2007 6:15 AM

How can you convert velocity into pressure? They are both separate. An increase/decrease in velocity corelates with pressure increase/decrease.

In other words, its a flow corelating with pressure.

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#10

Re: cnversion of velocity to pressure....

07/22/2007 2:31 PM

You may need to supply more details re exactly what you want. A flat sheet (of plywood, for example) will convert velocity to pressure in this sense: the sheet has a Cd (coefficient of drag) and an area. (Actual Cd for a flat sheet is generally considered 1). For a given wind velocity, there will be a given drag force. Divide that force by the area of the sheet, and you get an average pressure.

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Anonymous Poster
#11
In reply to #10

Re: cnversion of velocity to pressure....

07/26/2007 10:38 AM

my case is while moving in a 4 wheeler with very high speed,can we convert the kinetic energy of opposing air into pressure (high velocity to high pressure air) energy to use some other purpose?

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#12
In reply to #11

Re: cnversion of velocity to pressure....

07/26/2007 2:36 PM

Yes, you can. That is the principal of "ram air" induction. However, this effect is much more subtle than you might expect. If it were more significant, you would see hood scoops on virtually all cars -- it would be a very inexpensive way to get supercharging. As it happens, for an aerodynamically efficient car (a Prius, for instance) the slight hp gain from ram air would be more than offset by the loss in aerodynamic efficiency.

To give you an idea of the forces involved: A 2000 pound airplane will have a wing area of about 100 square feet. 100 x 144 = 14,400 square inches. So the pressure available, on average, is about .14 psi: not enough to run many energy consumers.

So, yes, it is possible, but not usually practical.

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Anonymous Poster
#13
In reply to #12

Re: cnversion of velocity to pressure....

07/27/2007 7:02 AM

thank u sir....

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