User:Diesel Port Developer/Loss coefficient

Flow Coefficient

Pressure losses in turbulent flow are approximately proportional to the square of flow velocity. A loss coefficient for a pipe, passage or a component is defined as-

$K={\delta \,P \over {\tfrac {1}{2}}\,\rho \,v^{2},}$

where (using SI units):

$K\;$	= loss coefficient (unitless),
$\delta \,P\;$	= change in total pressure in pascals,
$\rho \;$	= fluid density in kg/m3 (e.g. density of air),
$v\;$	= fluid velocity in m/s.

A system loss coefficient is defined as the non-dimensional ratio of the total pressure difference when the real component is installed to the total pressure different when there is a zero-loss component. The Pressure Loss is non-dimensionalized by the component's inlet or exit Dynamic Pressure

External links

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