Introductio ad commune sentinam terms (4) – Pump similarity

lex
Similitudo applicationis theoria sentinarum

1. Cum similis lex applicatur ad eandem sentinam currentem in diversis velocitatibus vane, obtineri potest;
•Q1/Q2=n1/n2
•H1/H2=(n1/n2)2
•P1/P2=(n1/n2)3
•NPSH1/NPSH2=(n1/n2)2
c*
Exemplum:

Existens sentinam, exemplar est SLW50-200B, opus est mutatione SLW50-200B ab 50 Hz ad 60 Hz.
(a 2960 rpm ad 3552 rpm)

In 50 Hz, impulsor diametrum exteriorem 165 mm habet et caput 36 m.

H60Hz/H50Hz=(N60Hz/N50Hz) ²=(3552/2960)2=(1.2)²=1.44
Ad 60 Hz, H60Hz = 36×1.44 = 51.84m.
Ad summam, caput huius modi sentinae ad velocitatem 52m pervenire debet in 60Hz.


Post tempus: Jan-04-2024