Research Papers: Gas Turbines: Turbomachinery

Flow Control in an Aggressive Interturbine Transition Duct Using Low Profile Vortex Generators

[+] Author and Article Information
Yanfeng Zhang, Shuzhen Hu, Xue-Feng Zhang, Michael Benner, Ali Mahallati

National Research Council of Canada,
Ottawa, ON K1A 0R6, Canada

Edward Vlasic

Pratt & Whitney Canada,
Longueuil, QC J4G 1A1, Canada

Contributed by the Turbomachinery Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received January 14, 2013; final manuscript received April 8, 2014; published online June 3, 2014. Editor: David Wisler.

J. Eng. Gas Turbines Power 136(11), 112604 (Jun 03, 2014) (8 pages) Paper No: GTP-13-1010; doi: 10.1115/1.4027656 History: Received January 14, 2013; Revised April 08, 2014

This paper presents an experimental investigation of the flow mechanisms in an aggressive interturbine transition duct with and without low-profile vortex generators flow control. The interturbine duct had an area ratio of 1.53 and a mean rise angle of 35 deg. Measurements were made inside the annulus at a Reynolds number of 150,000. At the duct inlet, the background turbulence intensity was raised to 2.3% and a uniform swirl angle of 20 deg was established with a 48-airfoil vane ring. Results for the baseline case (no vortex generators) showed the flow structures within the duct were dominated by counter-rotating vortices and boundary layer separation in both the casing and hub regions. The combination of the adverse pressure gradient at the casing's first bend and upstream low momentum wakes caused the boundary layer to separate on the casing. The separated flow on the casing appears to reattach at the second bend. Counter-rotating and corotating vortex generators were installed on the casing. While both vortex generators significantly decreased the casing boundary layer separation with consequential reduction of overall pressure losses, the corotating configuration was found to be more effective.

Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Fig. 1

Cutaway of ITD test rig with measurement locations and coordinate system

Grahic Jump Location
Fig. 2

Low-profile vortex generator configurations

Grahic Jump Location
Fig. 3

Hub and casing static pressure coefficient distribution at baseline

Grahic Jump Location
Fig. 4

Total pressure and streamwise vorticity coefficient contours at baseline

Grahic Jump Location
Fig. 5

Hub and casing flow visualizations at baseline

Grahic Jump Location
Fig. 6

Casing flow visualization with flow control

Grahic Jump Location
Fig. 7

Hub and casing static pressure coefficient distribution with and without flow control

Grahic Jump Location
Fig. 8

Total pressure and streamwise vorticity coefficient contours in ITD with flow control

Grahic Jump Location
Fig. 9

Pitchwise mass-averaged total pressure loss coefficients at the ITD outlet

Grahic Jump Location
Fig. 10

Loss coefficients in ITD with and without LPVGs flow control




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