0
Research Papers

Film Cooling Effectiveness Measurements With Periodic Unsteady Inflow on Highly Loaded Blades With Main Flow Separation

[+] Author and Article Information
Reinaldo A. Gomes

Institute of Jet Propulsion, University of the Federal Armed Forces Munich, Werner-Heisenberg-Weg 39, 85577 Munich, Germanyreinaldo.gomes@unibw.de

Reinhard Niehuis1

Institute of Jet Propulsion, University of the Federal Armed Forces Munich, Werner-Heisenberg-Weg 39, 85577 Munich, Germanyreinhard.niehuis@unibw.de

1

Corresponding author.

J. Turbomach 133(2), 021019 (Oct 25, 2010) (11 pages) doi:10.1115/1.4000568 History: Received July 20, 2009; Revised July 31, 2009; Published October 25, 2010; Online October 25, 2010

Film cooling experiments were performed using a highly loaded high pressure turbine blade blade linear cascade. A large region with main flow separation is found on the pressure side and film cooling is provided into this area with three rows of either cylindrical or fan-shaped holes. The measurements comprise adiabatic film cooling effectiveness and profile static pressure measurements. The surface temperature was acquired with thermochromatic liquid crystals and using a hue to temperature correlation. The results shown are for variations in main flow Mach and Reynolds numbers at engine relevant levels and of coolant mass flows. The results for steady and periodic unsteady inflows with highly turbulent wakes created by cylindrical bars moving upstream in a plane parallel to the cascade are compared as two-dimensional surface plots, laterally averaged film cooling effectiveness and overall effectiveness over the entire surface.

Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

The high-speed cascade wind tunnel

Grahic Jump Location
Figure 2

Wake generator setup

Grahic Jump Location
Figure 3

Schematic of the test section and cascade instrumentation (not to scale)

Grahic Jump Location
Figure 4

Definition of the geometric data on the T120D cascade (not to scale)

Grahic Jump Location
Figure 5

T120D blade and detail of film cooling (not to scale)

Grahic Jump Location
Figure 6

Schematic of the Image acquisition of the PS surface

Grahic Jump Location
Figure 7

FEM model of the T120 blade and applied boundary conditions

Grahic Jump Location
Figure 8

Schematic of a film cooling streamline from the second row

Grahic Jump Location
Figure 9

Inlet turbulence level with periodic unsteady wakes

Grahic Jump Location
Figure 10

Inlet total pressure downstream of the wakes

Grahic Jump Location
Figure 11

Isentropic Mach number on the blade without FC

Grahic Jump Location
Figure 12

Cp on the PS of the blade for steady inflow

Grahic Jump Location
Figure 13

Cp on the PS of the blade for periodic unsteady inflow

Grahic Jump Location
Figure 14

Film cooling effectiveness on the PS of the blade for steady inflow

Grahic Jump Location
Figure 15

Film cooling effectiveness in 2D for Ma2th=0.87, Re2th=390,000, and ptc/pt1=1.09

Grahic Jump Location
Figure 16

Film cooling effectiveness in 2D for Ma2th=0.87, Re2th=390,000, and ptc/pt1=1.12

Grahic Jump Location
Figure 17

Film cooling effectiveness on the PS of the blade for Ma2th=0.87; Re2th=390,000 with steady and periodic unsteady inflow

Grahic Jump Location
Figure 18

Film cooling effectiveness contours on the PS of the blade for Ma2th=0.87; Re2th=390,000 with steady inflow

Grahic Jump Location
Figure 19

Film cooling effectiveness contours on the PS of the blade for Ma2th=0.87; Re2th=390,000 with periodic unsteady inflow

Grahic Jump Location
Figure 20

Film cooling effectiveness on the PS of the blade for Ma2th=0.87; Re2th=800,000 with steady and periodic unsteady inflow

Grahic Jump Location
Figure 21

Film cooling effectiveness on the PS of the blade for Ma2th=0.95; Re2th=390,000 with steady and periodic unsteady inflow

Grahic Jump Location
Figure 22

Average film cooling effectiveness for all operation points as function of coolant pressure ratio

Grahic Jump Location
Figure 23

Average film cooling effectiveness as function of the coolant volume flow

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