Similarity Laws Video Lecture - Fluid Mechanics for Mechanical Engineering

hey guys the objectives for this video
it's a discus similarity laws and to
discuss equations for specific speed and
suction specific speed so our similarity
similarity laws are here essentially
these are dimensionless coefficients
that we can use to compare what we might
call a model and what we might call a
prototype so when we've got something
constant between the two of these we can
compare how the other two variables
might change so upload coefficient that
is the flow rate divided by the angular
loss angular velocity divided by our
diameter cubed and then we've got our
head rise coefficient that's equal to
gravity times our gain in head divided
by angular velocity squared divided by
odometers squared and that remains
constant
well what's got our power coefficient
which is the power and our Shelf divided
by density divided by angular velocity
cubed divided by our diameter to the
power of 5 and we've also got the total
efficiency remains constant between a
model and a prototype so we can use
these when we're comparing a model pump
to a prototype pump and vice versa the
last two equations that you need to know
are your equation for is your equation
for specific speed which is NS s equal
to angular
you