Numerical prediction of pressure fluctuations in a prototype pump turbine base on PANS methods

Content Provider	Scilit
Author	Liu, J. T. Li, Y. Gao, Y. Hu, Q. Wu, Y. L.
Copyright Year	2016
Description	Journal: Iop Conference Series: Materials Science and Engineering Unsteady flow and pressure fluctuations within a prototypel pump turbine are numerically studied using a nonlinear Partial Averaged Navier Stokes (PANS) model. Pump turbine operating at different conditions with guide vanes opening angle 6° is simulated. Results revealed that the predictions of performance and relative peak-to-peak amplitude by PANS approach agree well with the experimental data. The amplitude of the pressure fluctuation in the vaneless space at turbine mode on a "S" curve increases with the decrease of the flow rate, and it has maximum value when it runs close to runaway line at turbine braking mode. The amplitude of the pressure fluctuation in the vaneless space at turbine braking mode on a "S" curve decreases with the reduce of the flow rate. The above high pressure fluctuations should be avoided during the design of pump turbines especially those operating at high-head condition.
Related Links	http://iopscience.iop.org/article/10.1088/1757-899X/129/1/012050/pdf
ISSN	17578981
e-ISSN	1757899X
DOI	10.1088/1757-899x/129/1/012050
Journal	Iop Conference Series: Materials Science and Engineering
Volume Number	129
Language	English
Publisher	IOP Publishing
Publisher Date	2016-05-19
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Materials Science and Engineering Mechanical Engineering Pressure Fluctuations Pump Turbine Flow Rate Braking Mode Turbine Braking
Content Type	Text
Resource Type	Article