impeller

[chemeng1357]

Hi
How diameter of impeller affect input power for agitation purpos?
is there relation for it?
thanks for your reply

 

[EmmanuelTop]

http://www.engineeringtoolbox.com/affinity-laws-d_408.html

 

[chemeng1357]

thanks EmmauelTop
for reply,
can you address practical formulas for mixing application?
thanks

 

[cawse001]

chemeng1357

The basic relationship between Power (P), speed (N), diameter (D) and fluid density ([ρ])is:

P [∝] N^3.D^5.[ρ]

Specific calculations need input from the suppliers with regards to the performance of the particular impeller type selected.

Regards,

NB

 

[boonchoo2211]

The power dissipation of a mixing impeller is given by the following correlation:

P = N*p*N3D5/1000

where: P = power dissipation, kW
N = power number, dimensionless
p = fluid density at conditions, kg/m3
N = impeller rotational speed, revis
D = impeller diameter, m

Prutiew