Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen: https://doi.org/10.21256/zhaw-23112
Publikationstyp: Beitrag in wissenschaftlicher Zeitschrift
Art der Begutachtung: Peer review (Publikation)
Titel: Master equation, design equations and runaway speed of the Kaplan turbine
Autor/-in: Zhang, Zh.
et. al: No
DOI: 10.1007/s42241-021-0020-1
10.21256/zhaw-23112
Erschienen in: Journal of Hydrodynamics
Band(Heft): 33
Heft: 2
Seiten: 282
Seiten bis: 300
Erscheinungsdatum: 7-Apr-2021
Verlag / Hrsg. Institution: Springer
ISSN: 1001-6058
1878-0342
Sprache: Englisch
Schlagwörter: Kaplan turbine; Master equation; Design equation; Runaway speed; Hydraulic efficiency; Shock loss; Swirling loss; Bulb turbine
Fachgebiet (DDC): 620: Ingenieurwesen
Zusammenfassung: To make the Kaplan turbine technology comparable to both the Pelton and the Francis turbine, the master equation for the Kaplan turbine has been established by analyses similar to that for the Francis turbine. The analysis begins with the descriptions of free vortex flows at the runner inlet and the swirl flow at the impeller exit. By considering the Euler equation for specific work and by further evaluating the most significant shock and swirling losses, the first and the second energy equations in the form of hydraulic efficiency were formulated. The master equation is then established by combining both energy equations. In addition, three design equations and a new design parameter are presented. The master equation relates the turbine hydromechanics to the geometrical design of both the runner and the guide-vane parameters. It enables the complete hydraulic characteristics of a given Kaplan turbine to be analytically and simply computed. A computation example demonstrates the functionality and applicability of the method. With the reconstructed master equation, the runaway speed of the Kaplan turbine and its dependence on the guide-vane setting can be easily and precisely computed. For bulb turbines with guide vanes directly ahead of the turbine runner in the same tube, all computations are also applicable using another equivalent control parameter.
URI: https://digitalcollection.zhaw.ch/handle/11475/23112
Volltext Version: Akzeptierte Version
Lizenz (gemäss Verlagsvertrag): Lizenz gemäss Verlagsvertrag
Departement: School of Engineering
Organisationseinheit: Institut für Energiesysteme und Fluid-Engineering (IEFE)
Enthalten in den Sammlungen:Publikationen School of Engineering

Dateien zu dieser Ressource:
Datei Beschreibung GrößeFormat 
2021_Zhang_Master-Equation-Kaplan-Turbine.pdfAccepted Version806.14 kBAdobe PDFMiniaturbild
Öffnen/Anzeigen
Zur Langanzeige


Alle Ressourcen in diesem Repository sind urheberrechtlich geschützt, soweit nicht anderweitig angezeigt.