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http://dx.doi.org/10.5916/jkosme.2007.31.8.947

Occurrence Mechanism and Characteristics of Pressure Pulsation in a Positive Displacement Hydraulic Turbine  

Choi, Young-Do (한국해양대학교 산학협력단)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.31, no.8, 2007 , pp. 947-953 More about this Journal
Abstract
Occurrence of pressure pulsation in positive displacement hydraulic turbine is one of the principal problems which should be cleared to improve the turbine performance and to put the turbine to practical use. Therefore, present study is tried to examine the occurrence mechanism and characteristics of the pressure pulsation CFD analysis and experimental measurement are implemented in this study to clarify the phenomena of unsteady pressure pulsation. The results show that occurrence reason of the pressure pulsation is not only due to a series of opening and closing of the chamber formed between rotor and casing wall but also due to the variation of rotational speed of following rotor. The pressure pulsation causes torque variation and the curve patterns of the torque variation conforms to that of the pressure pulsation. Pressure in the chamber is equal to the averaged value of inlet and outlet pressures. Sudden pressure decrease by accelerated through-flow between lobe and casing wall results in torque loss.
Keywords
Positive displacement hydraulic turbine; Pressure pulsation; Torque variation; Computational fluid dynamics;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
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