HOME > Laboratory > T.K. FILMIX TOPICS > other What does the formula describing the turbine discharge volume really mean ? If we define N as the turbine rotation speed (rpm) and D as the turbine diameter, then discharge volume Q is Qnd3 , or Q = (n) (d3) --------- (1) (n) = Turbine rotation speed (rpm ) = no. of times turbine liquid is discharged within a unit of time (d3) : discharge per turbine revolution. is used to add meaning to the unit. From equation (1), discharge volume Q is given by [rotation speed] x [discharge capacity]. We define k as NQ and call it the turbine discharge volume figure (or calculation). * The higher the viscosity of the liquid being processed, the lower the NQ value. * The lower the liquid head (liquid level drops, pressure drops, under vacuum, etc.), the lower the value. In other words, the NQ value depends on the shape of the turbine, the viscosity of the material being processed, the liquid head inside the vessel, the turbine rotation speed, etc.
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