Influence of Prehistory and Leading Edge Contouring on Aero Performance of a Three-Dimensional Nozzle Guide Vane
2014 (English)In: Journal of turbomachinery, ISSN 0889-504X, Vol. 136, no 7, 071014-1-071014-10 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
ASME Press, 2014. Vol. 136, no 7, 071014-1-071014-10 p.
Secondary Flows, Blade Passage, Fillets
Aerospace Engineering Applied Mechanics Energy Engineering
Research subject SRA - Energy
IdentifiersURN: urn:nbn:se:kth:diva-139946DOI: 10.1115/1.4026076ISI: 000335964100014OAI: oai:DiVA.org:kth-139946DiVA: diva2:687878
FunderSwedish Energy Agency
QC 201406122014-01-152014-01-152014-09-09Bibliographically approved