This paper describes the use of the free-form-deformation (FFD) parameterization method to create a novel blade shape for a highly loaded, transonic axial compressor. The novel geometry makes use of precompression (via an S-shaping of the blade around midspan) to weaken the shock and improve the aerodynamic performance. It is shown how free-form-deformation offers superior flexibility over traditionally used parameterization methods. The novel design (produced via an efficient optimization method) is presented and the resulting flow is analyzed in detail. The efficiency benefit is over 2%, surpassing other results in the literature for the same geometry. The precompression effect of the S-shape is analyzed and explained, and the entropy increase across the shock (along the midblade line) is shown to be reduced by almost 80%. Adjoint surface sensitivity analysis of the datum and optimized designs is presented, showing that the S-shape is located in the region predicted to be most significant for changes in efficiency. Finally, the off-design performance of the blade is analyzed across the rotor characteristics at various speeds.
Novel Compressor Blade Shaping Through a Free-Form Method
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received September 7, 2016; final manuscript received December 24, 2016; published online March 15, 2017. Editor: Kenneth Hall.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
John, A., Shahpar, S., and Qin, N. (March 15, 2017). "Novel Compressor Blade Shaping Through a Free-Form Method." ASME. J. Turbomach. August 2017; 139(8): 081002. https://doi.org/10.1115/1.4035833
Download citation file:
- Ris (Zotero)
- Reference Manager