0
Research Papers

Interaction of Wheelspace Coolant and Main Flow in a New Aeroderivative Low Pressure Turbine

[+] Author and Article Information
F. Montomoli, M. Massini1

 GE Infrastructure, Oil & Gas, Via Matteucci 2, Firenze, Italy

N. Maceli, M. Cirri, L. Lombardi, A. Ciani, M. D’Ercole, R. De Prosperis

 GE Infrastructure, Oil & Gas, Via Matteucci 2, Firenze, Italy

1

Present address: Whittle Laboratory, University of Cambridge, UK.

J. Turbomach 132(3), 031013 (Apr 02, 2010) (7 pages) doi:10.1115/1.3195036 History: Received May 21, 2009; Revised June 03, 2009; Published April 02, 2010; Online April 02, 2010

Increased computational capabilities make available for the aero/thermal designers new powerful tools to include more geometrical details, improving the accuracy of the simulations and reducing design costs and time. In the present work, a low-pressure turbine was analyzed, modeling the rotor-stator including the wheel space region. Attention was focused on the interaction between the coolant and the main flow in order to obtain a more detailed understanding of the behavior of the angel wings, to evaluate the wall heat flux distribution, and to prevent hot gas ingestion. Issues of component reliability related to thermal stress require accurate modeling of the turbulence and unsteadiness of the flow field. To satisfy this accuracy requirement, a full 3D URANS simulation was carried out. A reduced count ratio technique was applied in order to decrease numerical simulation costs. The study was carried out to investigate a new two-stage low-pressure turbine from GE Infrastructure Oil & Gas to be coupled to a new aeroderivative gas generator (the LM2500+G4) developed by GE Infrastructure, Aviation.

Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Typical LPT wheel space

Grahic Jump Location
Figure 2

YFT layout of triplets method

Grahic Jump Location
Figure 3

Cold cross section without thermal growth effects

Grahic Jump Location
Figure 4

Radial temperature distribution at flow path inlet

Grahic Jump Location
Figure 5

Secondary flows worm chart

Grahic Jump Location
Figure 6

Surface meshes (a) wheel space region and stator and (b) rotor tip

Grahic Jump Location
Figure 7

Entropy isosurfaces at different time steps

Grahic Jump Location
Figure 8

3D entropy distribution at φ=0.8

Grahic Jump Location
Figure 9

Total temperature distribution at 85% axial chord of the stator vane

Grahic Jump Location
Figure 10

Total pressure distribution at 85% axial chord of the stator vane

Grahic Jump Location
Figure 11

Time averaged streamlines

Grahic Jump Location
Figure 12

Fluctuating field with a cutting plane intersecting the stator LE 50% of pitch angle

Grahic Jump Location
Figure 13

Positive wall heat flux (flow colder than the solid surface)

Grahic Jump Location
Figure 14

Positive wall heat flux (flow colder than the solid surface)

Grahic Jump Location
Figure 15

Wall heat flux at points 1 and 2

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In