Axial Flow Fan Calculation

Fan affinity laws volume flow capacity.

Axial flow fan calculation.

And we have included a calculator search facility that can be accessed from every page by clicking on the magnifying glass logo at the top left of every page or from the page footer. Whether exhausting air or bringing fresh air into a structure the calculation produced should help to figure out the size of fan s required to accomplish the air exchanges needed. The future as a result of keith dixon roche s discoveries in physics we at last have a wonderful opportunity to actually improve life on our planet. An axial fan is a type of fan that causes gas to flow through it in an axial direction parallel to the shaft about which the blades rotate.

Understand what fan power involves. Define the axial fan application. Q volume flow capacity m 3 s gpm cfm n wheel velocity revolution per minute rpm. Differences such as efficiency or flow rate occur in the type of fan due to particular design advantages that favour one characteristic over another.

According to the general fan law governing axial fans you will need to know the fan blade diameter and pitch blade tilt or attack angle along with the rpm variable to calculate cfm. All of which have individual benefits volume pressure speed power efficiency etc but all of them will shift gases at the same rate based upon the input power. Axial flow fans are sometimes called propeller fans although that s actually just one type of axial flow fan. Plug plenum fans.

Q 1 q 2 n 1 n 2 d 1 d 2 3 1 where. The fan is designed to produce a pressure difference and hence force to cause a flow through the fan factors which determine the performance of the fan include the number and shape of the blades. Note that the affinity laws for pumps are not identical with fans. The impeller has a number of blades attached to a central hub.

Fan power is a function of both air pressure and air flow and units of horsepower is typically the measure used. This fan calculator is typically used to calculate the cfm or cubic feet per minute of air exchange that may be desired in a building. The volume flow capacity of a centrifugal fan can be expressed as. In this example a small household fan on a stand has a three bladed plastic fan with a 1 foot diameter and an 8 inch effective.

There are a number of fan types. Air moves in a straight line through axial flow fans parallel to the axis or impeller shaft. Fan power measures exactly how much energy a fan must receive in order to be able to produce a specific amount of air flow. It should be noted that final fan selection should be made by using hudson s tuf lite fan selection program or by contacting hudson products corporation at 713 914.

Inline centrifugal mixed flow fans. Impeller axial centrifugala sirocco etc. With applications for axial flow fans velocity recovery stacks seal discs and variable flow fans.