0
TECHNICAL PAPERS

Turbine Blade Surface Deterioration by Erosion

[+] Author and Article Information
Awatef A. Hamed, Widen Tabakoff, Kaushik Das, Puneet Arora

 Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, OH 45220

Richard B. Rivir

 Aeropropulsion and Power Directorate, Air Force Research Laboratory, Wright Laboratories Building 18, Wright Patterson AFB, OH 45433

J. Turbomach 127(3), 445-452 (Mar 01, 2004) (8 pages) doi:10.1115/1.1860376 History: Received October 01, 2003; Revised March 01, 2004

This paper presents the results of a combined experimental and computational research program to investigate turbine vane and blade material surface deterioration caused by solid particle impacts. Tests are conducted in the erosion wind tunnel for coated and uncoated blade materials at various impact conditions. Surface roughness measurements obtained prior and subsequent to the erosion tests are used to characterize the change in roughness caused by erosion. Numerical simulations for the three-dimensional flow field and particle trajectories through a low-pressure gas turbine are employed to determine the particle impact conditions with stator vanes and rotor blades using experimentally based particle restitution models. Experimental results are presented for the measured blade material/coating erosion and surface roughness. The measurements indicate that both erosion and surface roughness increase with impact angle and particle size. Computational results are presented for the particle trajectories through the first stage of a low-pressure turbine of a high bypass turbofan engine. The trajectories indicate that the particles impact the vane pressure surface and the aft part of the suction surface. The impacts reduce the particle momentum through the stator but increase it through the rotor. Vane and blade surface erosion patterns are predicted based on the computed trajectories and the experimentally measured blade coating erosion characteristics.

FIGURES IN THIS ARTICLE
<>
Copyright © 2005 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 13

Particle mean impact angle: (a) (left) vane pressure surface and (b) (right) vane leading edge

Grahic Jump Location
Figure 14

Erosion Rate: (a) (left) vane pressure surface and (b) (right) vane leading edge

Grahic Jump Location
Figure 1

Schematic of erosion test facility

Grahic Jump Location
Figure 2

Measured surface roughness for coated samples in erosion tests with 1500 μm crushed quartz at 90 deg

Grahic Jump Location
Figure 3

Change in erosion rate with impingement angle for 1500 μm crushed quartz at 600ft∕s

Grahic Jump Location
Figure 4

Change in erosion rate with impingement angle for runway sand at 300ft∕s

Grahic Jump Location
Figure 5

Effect of impingement angle on eroded surface roughness for runway sand at 300ft∕s

Grahic Jump Location
Figure 6

Coated sample surface after testing at 300ft∕s with runway sand at 60 deg impingement angle

Grahic Jump Location
Figure 7

Vane subjected to 1500 μm particles, 300ft∕s, 30 deg incidence. Erosion rate 5mg∕g of particles.

Grahic Jump Location
Figure 8

Computational grid

Grahic Jump Location
Figure 9

30 μm particle trajectories: (a) (left) rear view of the stator and (b) (right) front view of the rotor

Grahic Jump Location
Figure 10

Top view of particle trajectories through stator: (a) (left) 30 μm particles and (b) (right) 1500 μm particles

Grahic Jump Location
Figure 11

Top view of particle trajectories through rotor: (a) (left) 30 μm particles and (b) (right) 1500 μm particles

Grahic Jump Location
Figure 12

Impact frequency: (a) (left) vane pressure surface and (b) (right) vane leading edge

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