TT/TTA propeller MULTIPLAN

Hydraulic characteristics

• Axial flow
• D/T = 0.15 to 0.7
• Vp = 1 à 5
• Nq = 0.65 to 1.1
• Np = 0.7 to 1

Applications

• Homogenization
• Blending of liquids / miscible liquids
• Suspending solids
• Heat transfer

The TTP Propeller design allows a high mixing efficiency, The TTPA propeller allows a high mixing efficiency with reinforced axial flow.

Hydraulic characteristics

• Axial flow
• D/T = 0.15 to 0.7
• Vp = 1.5 to 8
• Nq = 0.65
• Np = 0.3 to 0.45

Applications

• Homogenization
• Blending of liquids / miscible liquids
• Suspending solids
• Heat transfer

Caractéristiques

• Axial flow<
• D/T = 0.15 to 0.7
• Vp = 1.5 to 8
• Nq = 0.65
• Np = 0.3 to 0.8

Applications

Hydraulic characteristics

• Radial/axial flow
• D/T = 0.2 to 0.6
• Vp = 1 to 6
• Nq = 0.8
• Np = 1.5

Applications

• Simple design for a mixed turbine

The dispersion turbine allows a high mixing efficiency with reinforced axial flow.

Hydraulic characteristics

• Radial flow
• D/T = 0.1 to 0.5
• Vp = 10 to 30
• 0.2 in turbulent operating conditions
• Np = varies with Re

Applications

• Process where very strong shearing is necessary
• Pasting
• Dispersion of solids into a liquid

Anchor is adapted for heat transfer and/or scrapping the tank walls in viscous area.

Hydraulic characteristics

• Tangential flow

Applications

• Homogenization of concentration and temperature in viscous media
• Heat transfers through walls of the tank
• Cosmetic industry, food industry

Applications

• Blending of very viscous liquids - Ribbon - helicoid is a specific impeller, which is exclusively a made and designed to measure one"

Np = power number

It is an adimensional number that depends on the propeller type. It varies according to the Reynolds' number and to surroundings (position in the tank, propeller diameter/tank diameter...).
Np is invariable in turbulent regime (Re > 10 000)

Nq = pumping number

It is an adimensional number that depends on the propeller type and stays constant in turbulent regime.

The absorbed power depends on the Np of the propeller, on the product voluminal mass, on the rotation speed and on the propeller diameter.
P = Np r N³D5

Qp = pumping flow

It is the liquid flow produced in the section of the agitation propeller. It depends on the Nq, on the rotation speed and on the propeller diameter.
Qp = NqND3

The circulation flow Qc can be calculated from the pumping flow.
Circulation flow Qc = pumping flow Qp carried away flow.
1,5 Qp < Qc < 2 Qp

Vf = flow velocity

It is the medium liquid velocity in the propeller section.
It's calculated only for axial flow impellers (TT, TTP... propellers) and for radial flow ones (Rushton turbine).

Vp = peripheral speed

It is the linear velocity of the propeller at the end of the blade. It is calculated for every kind of impeller. (axial, radial or tangential flow).
Vp = p DN

Heat exchange = calculation of hi transfer coefficient on the side of the reactive fluid.

FORMULAS

ρ = VOLUMIC MASS (kg/m³) μ = VISCOSITY (Pa.s) Cp = SPECIFIC HEAT (Kcal/Kg) K = HEAT CONDUCTIVITY OF THE PRODUCT (Kcal/s.m.°C) D = DIAMETER OF IMPELLER (m) T = DIAMETER OF TANK (m) N = ROTATION SPEED (tr/s) Re = REYNOLDS' NUMBER Adimensional number used to determinate the flow regime (laminar, turbulent and transitory)