In general, the discriminant is an algebraic expression that gives. information about the roots of a polynomial. In the case of a quadratic equation the discriminant is the part of. the quadratic equation that is under the radical sign.
How to Select Dampers and Louvers. Dampers and louvers are used to control the flow of air in a process system or enclosed area. Dampers are usually motorized or manually-adjustable for flow control. Louvers are often fixed for a constant flow rate.
Splitter damper is used to send certain amount of air into specific duct, for example if I want to send 2000cfm into a branch duct which is connected to a main duct, a splitter damper is used. But it increases the static loss. It is a control device, which is NOT recommend because of turbulence that is created.