Zhengji Zhang: Pelton Turbines | Buch

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Cover: 9783319319087 | Pelton Turbines | Zhengji Zhang | Buch | Englisch | Springer

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Sprache: Englisch

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Beschreibung

This book concerns the theoretical foundations of hydro mechanics of Pelton turbines from a viewpoint of engineering. For reference purposes all relevant flow processes and hydraulic aspects in a Pelton turbine have been analyzed completely and systematically. The analyses especially include the quantification of all possible losses existing in the Pelton turbine and the indication of most available potential for further enhancing the system efficiency. As a guideline the book therefore supports further developments of Pelton turbines with regard to their hydraulic designs and optimizations. It is thus suitable for the development and design engineers as well as those working in the field of turbo machinery. Many laws described in the book can also be directly used to simplify aspects of computational fluid dynamics (CFD) or to develop new computational methods. The well-executed examples help better understanding the related flow mechanics.

Über den Autor

Dr.-Ing. Zh. Zhang graduated from the School of Energy & Power Engineering of Xi'an Jiaotong University (PR China) in 1981. He received his PhD at the Institute of Thermo and Fluid Dynamics of Ruhr-University Bochum (Germany). Afterwards he joined Sulzer Markets & Technology Ltd in Winterthur, Switzerland, for experimental research of engineering flows. During this time he was awarded the company innovation prize. He changed later to the Oberhasli Hydroelectric Power Company (KWO) and later to Rütschi Fluids AG. Currently he is a visit engineer for supporting the research projects at the Laboratory of Hydraulics, Hydrology and Glaciology (VAW) of the Swiss Federal Institute of Technology in Zurich (ETHZ). He is the author of the monographs 'Freistrahlturbinen' 2008 and 'LDA Application Methods' 2010. In 2014, he was elected to ASME Fellow.

Zusammenfassung

Systematically describes the hydraulic processes in a Pelton turbine from the turbine inlet to outlet, and provides most helpful guidelines for engineers with hydraulic and mechanical designs

Completely analyzes all relevant flow processes and hydraulic aspects in a Pelton turbine

Provides well-executed examples to help better understand the related flow mechanics

Includes supplementary material: [...]

Inhaltsverzeichnis

Introduction.- Working principle of Pelton turbines.- Injector characteristics.- Jet characteristics and measurements.- Interaction between the jet and Pelton wheel.- Fluid mechanics in the rotating bucket.- Water spreading in the rotating bucket.- Exit flow conditions.- Exit flows and hydraulic losses.- Fricton effects and flow friction theorem.- Viscous cross-flow through the bucket.- Viscous longitudinal flow through the bucket.- Friction and windage losses in Pelton wheels.- Power loss due to bearing frictions.- Hydraulic and mechanical efficiency.- Real hydraulic efficiency characteristics.- Runaway speed and acceleration profile.- Hydraulic design of Pelton turbines.- Multi-jet Pelton turbines.- Geometric and hydraulic similarities.- Model turbine tests and efficiency scale-up.- Sand abrasion and particle motion in the bucket flow.- Bucket mechanical strength and similarity laws.- Appendices: Nomenclature.- Definition of derived parameters.- Specific speed and application in Pelton turbines.- Specification of the jet piece for a bucket.- Specification of the bucket positions.- Particle motion along the streamlines in the Pelton Bucket.

Details

Erscheinungsjahr:	2016
Fachbereich:	Fertigungstechnik
Genre:	Technik
Rubrik:	Naturwissenschaften & Technik
Medium:	Buch
Seiten:	328
Inhalt:	xiii 311 S. 124 s/w Illustr. 6 farbige Illustr. 311 p. 130 illus. 6 illus. in color.
ISBN-13:	9783319319087
ISBN-10:	3319319086
Sprache:	Englisch
Herstellernummer:	978-3-319-31908-7
Ausstattung / Beilage:	HC runder Rücken kaschiert
Einband:	Gebunden
Autor:	Zhang, Zhengji
Auflage:	1st ed. 2016
Hersteller:	Springer International Publishing Springer International Publishing AG
Maße:	241 x 160 x 24 mm
Von/Mit:	Zhengji Zhang
Erscheinungsdatum:	21.06.2016
Gewicht:	0,658 kg

preigu-id: 103905936