Orifice flow energy relation
Orifice flow energy relation
(OP)
I am developing a model of an orifice for liquid flow through a cylindar, which consists of transfer functions relating input to output conditions and having parameters (density, MW, Gamma, & composition) definable by the user. The liquid will either be some form of water or liquid fuel. I would like to find a derived equation or relation that would allow for the calculation of exit temperature (or energy).
Assume:
Incompressible fluid
Constant properties
Setup as flange tap orifice (Pin and Pout at 1 inch before and after orifice respectively)
Known:
Pin, Tin, Pout, density, viscosity, Din=Dout, Dorifice, Athrout, mdot, Q, Vin, Vout, Vthrout
Thanks in advance.
Assume:
Incompressible fluid
Constant properties
Setup as flange tap orifice (Pin and Pout at 1 inch before and after orifice respectively)
Known:
Pin, Tin, Pout, density, viscosity, Din=Dout, Dorifice, Athrout, mdot, Q, Vin, Vout, Vthrout
Thanks in advance.





RE: Orifice flow energy relation
1) Power (which is energy "flow" i.e. energy supplied per unit of time) equals:
Q*p (volumetric flow multiplied by pressure)
2) Temperature change is negligable
3) Crucial is Monsignor Bernoulli who stated Law of conservation of energy for incompressible (and inviscid) flows:
flow kinetic energy + flow potencial energy = constant along a flow
Usually expressed in terms of pressure see: http://www.grc.nasa.gov/WWW/K-12/airplane/bern.html