Experiments are conducted to investigate the effect of the prehistory in the aerodynamic performance of a three-dimensional nozzle guide vane with a hub leading edge contouring. The performance is determined with two pneumatic probes (five hole and three hole) concentrating mainly on the end wall. The investigated vane is a geometrically similar gas turbine vane for the first stage with a reference exit Mach number of 0.9. Results are compared for the baseline and filleted cases for a wide range of operating exit Mach numbers from 0.5 to 0.9. The presented data includes loading distributions, loss distributions, fields of exit flow angles, velocity vector, and vorticity contour, as well as mass-averaged loss coefficients. The results show an insignificant influence of the leading edge fillet on the performance of the vane. However, the prehistory (inlet condition) affects significantly in the secondary loss. Additionally, an oil visualization technique yields information about the streamlines on the solid vane surface, which allows identifying the locations of secondary flow vortices, stagnation line, and saddle point.
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July 2014
Research-Article
Influence of Prehistory and Leading Edge Contouring on Aero Performance of a Three-Dimensional Nozzle Guide Vane
Ranjan Saha,
Ranjan Saha
Heat and Power Technology,
e-mail: ranjan.saha@energy.kth.se
KTH Royal Institute of Technology
,Stockholm SE-100 44
, Sweden
e-mail: ranjan.saha@energy.kth.se
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Boris I. Mamaev,
Boris I. Mamaev
Energy Oil & Gas Design Department,
Siemens LLC,
Siemens LLC,
B. Tatarskaya Street, 9
,Moscow 115184
, Russia
Search for other works by this author on:
Torsten H. Fransson
Torsten H. Fransson
Heat and Power Technology,
KTH Royal Institute of Technology
,Stockholm SE-100 44
, Sweden
Search for other works by this author on:
Ranjan Saha
Heat and Power Technology,
e-mail: ranjan.saha@energy.kth.se
KTH Royal Institute of Technology
,Stockholm SE-100 44
, Sweden
e-mail: ranjan.saha@energy.kth.se
Boris I. Mamaev
Energy Oil & Gas Design Department,
Siemens LLC,
Siemens LLC,
B. Tatarskaya Street, 9
,Moscow 115184
, Russia
Torsten H. Fransson
Heat and Power Technology,
KTH Royal Institute of Technology
,Stockholm SE-100 44
, Sweden
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received November 4, 2013; final manuscript received November 8, 2013; published online January 2, 2014. Editor: Ronald Bunker.
J. Turbomach. Jul 2014, 136(7): 071014 (10 pages)
Published Online: January 2, 2014
Article history
Received:
November 4, 2013
Revision Received:
November 8, 2013
Citation
Saha, R., Mamaev, B. I., Fridh, J., Laumert, B., and Fransson, T. H. (January 2, 2014). "Influence of Prehistory and Leading Edge Contouring on Aero Performance of a Three-Dimensional Nozzle Guide Vane." ASME. J. Turbomach. July 2014; 136(7): 071014. https://doi.org/10.1115/1.4026076
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