Flashcards in LABS - 4A: Energy Loss in Bends Deck (7)
What does Bernoulli's principle state?
As the speed of a moving fluid increases, the pressure exerted by that fluid decreases.
(Pressure is inversely proportional to fluid velocity).
What is the equation for Bernoulli's principle?
p + (ρv²)/2 + ρgh = constant
p = pressure
ρ = density
v = velocity
h = height/elevation
g = acceleration by gravity
[dynamic and static pressures]
What kind of energy losses does a fluid experience in pipework?
Ek transferred and lost as heat energy (due to friction/head loss due to friction)
What's head loss?
Energy lost due to resistance to flow.
This can occur due to sudden changes e.g. in pipe diameter
Major loss - loss in pipes and ducts
Minor loss - loss in components e.g. valves
What is the loss coefficient, K l?
A ratio of potential to kinetic energies, suggesting any additional energy lost in flow.
What do manometers measure?