![]() ![]() The other one will be calculated p 2 pressure downstream from the nozzle Δp measured pressure difference in front and after the nozzle Select value to input. ṁ - mass flow rate Fluid flow rate in terms of units of mass per unit of time V 1 - upstream velocity Flow velocity at the nozzle inlet where flow diameter is D 1 T 1 - upstream temperature Fluid temperature for gas density calculation based on the ideal gas state equation ρ 1 - upstream density Fluid density at the nozzle inlet in terms of mass per unit of volume R - gas constant Gas constant in terms of energy per unit of mass and temperature, for gas density calculation using ideal gas state equation κ - isentropic coefficient Specific heat ratio ν - kinematic viscosity Result of fluid particles colliding to each other and moving at different velocities in terms of area per square unit of time μ - dynamic viscosity Result of fluid particles colliding to each other and moving at different velocities in terms of mass per square unit of distance and time Calculation setup Select nozzle type based on its shape Nozzle Classic shape Long radius For less pressure drop Venturi nozzle Shaped like Venturi Select value to input. Description p 1 - inlet pressure Absolute pressure in front of the nozzle p 2 - throat pressure Absolute pressure at the nozzle throat Δp - pressure drop Measured pressure difference Δω - pressure loss That can't be recovered after the nozzle D 1 - inlet diameter Nozzle internal inlet diameter D 2 - throat diameter Nozzle throat diameter e - expansion factor Coefficient used for compressible flow calculation C - coefficient of discharge Coefficient used for nozzle based on ISO 5167 R eD - inlet Reynolds Reynolds number calculated in front of the nozzle R ed - throat Reynolds Reynolds number calculated at the nozzle throat K - resistance coefficient That you can use in pipeline calculation, as nozzle is creating local pressure losses in the pipeline q 1 - volumetric flow rate Fluid flow rate in terms of units of volume per unit of time on the inlet conditions q - standard flow Flow rate at standard conditions. ![]()
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