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Title of Journal: J Mech Sci Technol

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Abbravation: Journal of Mechanical Science and Technology

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Korean Society of Mechanical Engineers

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DOI

10.1007/s11573-008-0203-z

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ISSN

1976-3824

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Threedimensional flow simulation of transient pow

Authors: Jintao Liu Shuhong Liu Yuekun Sun Lei Jiao Yulin Wu Leqin Wang
Publish Date: 2013/05/23
Volume: 27, Issue: 5, Pages: 1305-1312
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Abstract

The transient power failure process of a prototype pumpturbine was studied numerically by threedimensional 3D simulations Fluid coupling and dynamic mesh DM method were used to calculate the rotational speed of the runner Simulations were performed based on turbulence model Specific transient characteristics such as the flow rate head rotational speed were analyzed The pumpturbine had a minimum head and a maximum axial force when the flow rate was 0 during the transient process Pressure fluctuations increased when the pumpturbine ran at pump braking mode Reverse flow in the casing as well as stall phenomenon in the runner had a great effect on the change of head Pressure in the runner was greatly reduced when the pumpturbine ran at pump braking mode The computational method could be used to interpret the abnormal phenomenon by the analysis of flow mechanism during a transient processJintao Liu received Bachelor degree in chemical process equipment from China University Of Petroleum Shandong China in 2008 then the PhD degrees in fluid mechanical engineering from the Zhejiang University Hangzhou China in 2013 He has been engaged in researches about hydraulic design and flow instability of fluid machineries

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