Читать книгу Agitator Design for Gas-Liquid Fermenters and Bioreactors - Gregory T. Benz - Страница 67

COff bottom clearanceCPHeat capacity at constant pressureDImpeller diameter, edge to edgeDSSwept diameter, or point‐to‐point diagonal diameterdv/dxShear rateFdDimensionless hydraulic forceFhHydraulic forceFTImpeller axial thrustgGravitational accelerationhConvective heat transfer coefficientkThermal conductivityKMMetzner–Otto constantMViscosity coefficientNShaft speedNAAeration number; also called gas flow numberNBDimensionless blend timeNPPower numberNQFlow or pumping numberNReReynolds numberNTThrust NumbernPower law exponentnbbaffle numberOImpeller offset from tank center linePPower drawPgGassed power drawPuUngassed power drawQImpeller discharge rate; also called pumping capacityQgActual gas flow at the impellerSImpeller spacingTTank DiameterTqImpeller torquetbBlade thicknessWActual blade widthWPProjected blade widthwbBaffle width, calculated normal to tank wallvLiquid velocityZLiquid height