RPM range for air duster/blower

[dkali1]

What RPM range air duster will have enough air force to clean a driveway snow? Can we increase the air pressure of an air blower/duster by an attachment having a jet or slit?

 

[Gr8blu]

The air pressure requirement is going to depend (a LOT) on the kind of snow and the amount of snow. Think about how hard it is to move wet leaves vs dry leaves - or small branches, instead of dry twigs. Snow can be fairly deep, and wet, and sometimes covered in ice (either from melt or from rain after the initial snowfall).

In really general terms, the output (i.e. pressure) from a blower is going to be a function of the power applied, the speed of the fan that's "pushing" the air, the shape and size of the housing, and the cross-section of the outlet. The air density itself might have a marginal effect, as might the humidity.

There's a reason snow removal tends to be by mechanical means (e.g. brushes, shovels, scrapers, etc.).

 

[Stick.]

While Gr8blu is right about snow consistency and mechanical means being preferred, I've also seen people successfully use a standard backpack style gas leaf blower to clear snow as long as it's relatively fluffy and only a few inches deep. So looking at specs for leaf blowers could be a good place to start.

 

[dkali1]

The air pressure requirement is going to depend (a LOT) on the kind of snow and the amount of snow. Think about how hard it is to move wet leaves vs dry leaves - or small branches, instead of dry twigs. Snow can be fairly deep, and wet, and sometimes covered in ice (either from melt or from rain after the initial snowfall).

In really general terms, the output (i.e. pressure) from a blower is going to be a function of the power applied, the speed of the fan that's "pushing" the air, the shape and size of the housing, and the cross-section of the outlet. The air density itself might have a marginal effect, as might the humidity.

There's a reason snow removal tends to be by mechanical means (e.g. brushes, shovels, scrapers, etc.).

Thanks for your reply/ Do you know which formula can calculate the air jet pressure when air pass through a small opening or slit?

 

[LittleInch]

Zero RPM

 

[dvd]

Study the fan curve to determine what kind of boost a nozzle may provide. Here is some information which may be helpful.

 

[dkali1]

Zero RPM

View attachment 5454

 

[Snickster]

I used my blower to blow off about 4" of snow on my car to the ground.

The thing about a blower is that it produces a very high flow at a low discharge pressure - just enough pressure to overcome pressure drop at tip and to increase velocity head. I think you will find that with a typical blower if you try to put a smaller diameter tip opening to increase the velocity, the flow will decrease to a minimum since the blower curve shows as pressure increases just a little at the discharge the flow reduces alot.

 

[MintJulep]

Air nozzle velocity.

Nozzle Air Velocity | Wolfram Formula Repository

The nozzle air velocity describes the speed of air flowing out of a nozzle under pressure. A nozzle is a device designed to control the direction or characteristics of a fluid flow (especially to increase velocity) as it exits an enclosed chamber or pipe.

resources.wolframcloud.com

 

[mfgenggear]

OP
Good luck

 

[dgeesaman]

While Gr8blu is right about snow consistency and mechanical means being preferred, I've also seen people successfully use a standard backpack style gas leaf blower to clear snow as long as it's relatively fluffy and only a few inches deep. So looking at specs for leaf blowers could be a good place to start.

And freshly fallen.

Fallen snow cross-links and solidifies with time and/or melt cycles.

I agree that leaf blowers can work and I thank my deity that none of my current neighbors use one. What a tremendously noisy and inefficient tool.