Analysis of pressure losses in the diffuser of a control valve
1 ENVIROS, s.r.o., Dykova 53/10, 101 00 Praha 10-Vinohrady, Czech Republic
2 Univerzity of West Bohemia, Department of Power System Engineering, Univerzitní 22 Pilsen, 306 14, Czech Republic
3 Czech Technical University in Prague, Department of Energy Engineering, Technická 4, Prague 6, Czech Republic
* Corresponding author: email@example.com
Published online: 12 May 2017
The pressure loss in the diffuser of a control valve is evaluated by using CFD computations. Pressure ratios and lifts of a cone for the recommended flow characteristics of an experimental turbine are considered. The pressure loss in a valve is compared with the pressure loss in a nozzle, i.e. the embodiment of the valve without a cone. Computations are carried out for the same mass flow. Velocity profiles are evaluated in both versions of computations. Comparison of computed pressure losses, with the loss evaluated by using relations for diffusers with the ideal velocity conditions in the input cross-section, is carried out.
© The Authors, published by EDP Sciences, 2017
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