• Home
  • About us
  • Your Publication
  • Catalogue
  • Newsletter
  • Help
  • Account
  • Contact / Imprint
Thesis - Publication series - Conference proceedings - Reference book - Lecture notes/Textbook - Journal - CD-/DVD-ROM - Online publication
Newsletter for authors and editors - New publications service - Archive
View basket
Catalogue : Details

Christopher Fuhrer

Numerical Investigation on Spontaneous Condensation in Low-Pressure Steam Turbine Aeroelasticity

FrontBack
 
ISBN:978-3-8440-8099-5
Series:Strömungstechnik
Keywords:steam turbine; flutter; aerodynamic damping; cfd; condensation; aeromechanics; flutter prediction; low-pressure turbine; last stage
Type of publication:Thesis
Language:English
Pages:176 pages
Figures:88 figures
Weight:260 g
Format:21 x 14,8 cm
Bindung:Paperback
Price:48,80 € / 61,10 SFr
Published:July 2021
Buy:
  » plus shipping costs
Download:

Available PDF-Files for this title:

You need the Adobe Reader, to open the files. Here you get help and information, for the download.

These files are not printable.

 
 DocumentDocument 
 TypePDF 
 Costs36,60 EUR 
 ActionPurchase in obligation and display of file - 5,2 MB (5444314 Byte) 
 ActionPurchase in obligation and download of file - 5,2 MB (5444314 Byte) 
     
 
 DocumentTable of contents 
 TypePDF 
 Costsfree 
 ActionDisplay of file - 359 kB (367924 Byte) 
 ActionDownload of file - 359 kB (367924 Byte) 
     

User settings for registered users

You can change your address here or download your paid documents again.

User:  Not logged in.
Actions:  Login / Register
 Forgotten your password?
Recommendation:You want to recommend this title?
Review copy:Here you can order a review copy.
Link:You want to link this page? Click here.
Export citations:
Text
BibTex
RIS
Abstract:In steam turbines, condensation of water vapor, which usually occurs in the last stages, leads to the formation of droplets. This changes the course of the expansion and the thermodynamics of the flow. Additionally, last stage rotor blades feature a long and slim blade design and are thus prone to flutter. The aim of this study is to numerically investigate the influence of wet steam effects on the flutter behavior of turbine blades.

Extensively validated numerical models are used to describe the two-phase flow, including droplet formation and growth under thermodynamic non-equilibrium conditions. To predict the aerodynamic damping, the energy method with influence coefficients is used as a today's state of the art approach.

Different wetness conditions are defined at the inlet of a tip section of a rotor blade. At first, different droplet sizes and wetness contents. Then, dry inlet conditions with strong spontaneous condensation occurring at different positions in the blade passage. Two mechanism that change the flutter behavior could be identified, a change of the shock structure and the speed of sound due to nucleation and droplet growth. Generally, the torsion mode is more susceptible to wet steam influence than bending modes. Finally, the results of modeling with the sophisticated wet steam model are compared to simple single-phase approaches.