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Topic: What is the general formula of agitator flow capacity?

anonymous
I'd like to know the general formula of agitator flow capacity. I found as follows: Flow capacity: Q = C1 x n x D2 x S Power required: P = C2 x r x n3 x D5 Q = Agitator flow (m3/min) P = Power (kW) n = Revolution speed (rps) D = Propeller diameter S = Propeller pitch r = Density (Kg/m3) C1 = Factor specific for the propeller C2 = Factor depending on turbulence Can this be applied to a side-entry agitator?
  • Avatar Dave Dickey Forum Moderator 287 Posts

    Re: What is the general formula of agitator flow capacity?

    First here are some modifications to the units used in your formulas.  Use standard metric units to be sure you get answers without conversion factors, see the following:
     
    Flow capacity: Q = C1 x n x D2 x S

    Power required: P = C2 x r x n3 x D5

    Q = Agitator flow (m3/s)
    P = Power (W)
    n = Revolution speed (rps)
    D = Propeller diameter (m)
    S = Propeller pitch
    r = Density (Kg/m3)
    C1 = Factor specific for the propeller
    C2 = Factor depending on turbulence
     
    Then for different propeller pitches, use the following values for C1 and C2
    S = 1.0    C1 = 0.54    C2 = 0.35
    S = 1.5    C1 = 0.66    C2 = 0.62
    S = 2.0    C1 = 0.77    C2 = 1.00
    S = 2.5    C1 = 0.85    C2 = 1.35

  • Avatar Annejan Visser Community Member 1 Post

    Re: What is the general formula of agitator flow capacity?

    How is propeller pitch number (S) determined? Are the formulas given applicable to rectangular or cubic vessels?