A New Tailpipe Design for GE Frame-Type Gas Turbines to Substantially Lower Pressure Losses

[+] Author and Article Information
Richard Golomb, Vivek Sahai, Dah Yu Cheng

Cheng Fluid Systems, Mountain View, CA 94040

J. Turbomach 125(1), 128-132 (Jan 23, 2003) (5 pages) doi:10.1115/1.1515335 History: Received October 09, 2001; Online January 23, 2003
Copyright © 2003 by ASME
Your Session has timed out. Please sign back in to continue.


Sultanian,  B. K., Nago,  S., and Sakamoto,  T., 1999, “Experimental and Three-Dimensional CFD Investigation in a Gas Turbine Exhaust System,” ASME J. Eng. Gas Turbines Power, 121(2), pp. 364–374.
Kosla, L., and Mutsakis, M., 1992, “New In-Pipe Flow Conditioner Cuts Fluid Problems,” Chemical Engineering Magazine, Sept.
Sahai,  V., and Golomb,  R., 2000, “Improve Condenser Water Flow To Improve Cash Flow,” Power Magazine, 144(4), July/Aug., p. 62.
Nelson, A., Vaezi, V., and Cheng, D. Y., 2002, “A 50% Plus Mid Range Advanced Cheng Cycle,” IGTI Turbo Expo, Amsterdam, The Netherlands, June 3–6.
Emery, J. C., Herrig, L. J., Erwin, J. R., and Felix, A. R., 1958, “Systematic Two-Dimensional Cascade Tests of NACA 65-Series Compressor Blades at Low Speeds,” NACA Technical Report 1386.
Jacobs, E. N., and Sherman, A., 1939, “Airfoil Section Characteristics as Affected by Variations of the Reynolds Number,” NACA Technical Report 586.


Grahic Jump Location
A schematic of GE frame gas turbine showing the exhaust gas path and areas where large pressure losses occur
Grahic Jump Location
Differences in flow behavior between (a) the current strut design, and (b) new strut design. The inlet conditions represent full speed full load operation. The turbulence caused by the current design leads to large pressure losses and removes the swirl that leads to large pressure losses downstream of the struts.
Grahic Jump Location
When water flows through an elbow, separation and turbulence occur. Using specially designed vanes to pre-rotate the fluid, the fluid negotiates the turn with all streamlines traveling in equal flow paths.
Grahic Jump Location
In a plain elbow with air flowing through, a skewed velocity profile results at the exit. With pre-rotation vanes, there is a flat velocity profile.
Grahic Jump Location
Without cones in a large expansion, significant back mixing occurs with a high velocity jet in the center. With overlapping concentric cones, the velocity profile through the expansion becomes uniform.
Grahic Jump Location
This is a schematic of a new tailpipe design that fits within the current space of the old design shown in Fig. 1. The struts will be modified to the new shape shown in Fig. 2. Downstream of the struts the wall and turning vanes will be replaced with an elbow.



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