User:Milton Beychok/Sandbox: Difference between revisions

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-===Fan laws===
-The basic fan laws governing the effect of fan wheel rotational speed (RPM) changes on volume (CFM), discharge static pressure (SP) and the drive motor operating horsepower (BHP) are:
-:<math>\frac {CFM_2}{CFM_1} = \bigg(\frac {RPM_2}{RPM_1}\bigg)</math><br><br>
-:&nbsp; &nbsp; &nbsp;<math>\frac {SP_{\,2}}{SP_{\,1}} = \bigg(\frac {RPM_2}{RPM_1}\bigg)^2</math><br><br>
-:<math>\frac {BHP_{\,2}}{BHP_{\,1}} = \bigg(\frac {RPM_2}{RPM_1}\bigg)^3</math>

Revision as of 21:13, 22 October 2008