How to generate High-velocity-Air from Vacuum-Air?

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Discussion Overview

The discussion revolves around generating high-velocity air from vacuum air, specifically focusing on achieving a minimum airflow of 50 CFM through a 3-inch pipe. Participants explore various methods and devices to accomplish this, including considerations of cost and efficiency.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant seeks to accelerate vacuum air to achieve a flow rate of 50 CFM, asking for suggestions on how to do this.
  • Another participant clarifies that CFM measures volume per unit time, not velocity, and requests more details about the intended application.
  • A participant elaborates that the goal is to pressurize free space air to fill a large blanket with 55 CFM, proposing the use of an electronic blower but expressing concerns about cost.
  • There is a suggestion that a vacuum cleaner could be a suitable alternative due to its cost and flow rate, but the need for specific pressure requirements is noted.
  • One participant questions the relevance of the inquiry, suggesting that the processes of sucking and blowing are merely different functions of the same device.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best method to generate high-velocity air, and multiple competing views regarding the use of different devices remain present.

Contextual Notes

Participants have not specified the pressure requirements needed for the application, which may affect the selection of appropriate devices.

Who May Find This Useful

Individuals interested in air flow dynamics, engineering applications involving air pressure, or cost-effective solutions for generating airflow may find this discussion relevant.

muthu.mari
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I need to accelerate the vacuum-air entering into a 3" pipe. It should provide minimum of 50CFM air-flow.

Do you have any idea? Please it here!
 
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Welcome to PF!

CFM is a measure of volume per unit time, not velocity. Could you try to explain in more detail what you are trying to do please.
 
russ_watters said:
Welcome to PF!

CFM is a measure of volume per unit time, not velocity. Could you try to explain in more detail what you are trying to do please.

Actually, i need to pressurize the Free space air which will be used to fill-up a large length (6-feet) blanket with 55 CFM air value. So to convert the free space air into Forced-air (achieving 55CFM), i need a principle. I got one logic, by using Electronic-blower we can create pressurized air with 50CFM. But this logic gives more cost due to costlier Motor and impeller. So i need it with lower cost within 300$.
 
muthu.mari said:
Electronic-blower we can create pressurized air with 50CFM. But this logic gives more cost due to costlier Motor and impeller. So i need it with lower cost within 300$.

How about a vacuum cleaner? Cost and flow rate fits your description.

However, to select a blower you also need to know the pressure required.
 
Sucking and blowing just use different ends of the same device, so I still don't see the point of the question.
 

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