Experimental and analytical studies of a transonic stator having controlled diffusion aerofoil with end bends

Nagpurwala, QH and Guruprasad, SA and Girigoswamy, H and Pai, BR (1995) Experimental and analytical studies of a transonic stator having controlled diffusion aerofoil with end bends. In: 12th ISABE - International Symposium on Air Breathing Engines, 10-15 Sept 1995, Melbourne, Australia.

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Abstract

A second generation, highly loaded stator having controlled diffusion airfoil (CDA) sections with end bends has been designed and tested in a transonic axial flow compressor test facility. The stator blade sections were obtained to match the rotor exit flow conditions that had been determined experimentally, and to impart a high turning of 35 deg, making the flow to leave the stator axially except near the end walls. Results of experimental performance evaluation have been compared with those obtained analytically by 3D time-marching Euler computations. Surface Mach number distribution typical of CDA blading has confirmed the applicability of a geometric design approach adopted for this stator. Flow visualization with fluorescent dyes has indicated a radially outward tendency of suction surface stream lines near the hub. The blade appears to be heavily loaded near the hub region, where refinement of the profile could improve the performance.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Controlled diffusion airfoil;Transonic axial flow compressor;Stator blade sections
Subjects: AERONAUTICS > Aircraft Propulsion and Power
Division/Department: Propulsion Division, Propulsion Division, Propulsion Division, Propulsion Division
Depositing User: M/S ICAST NAL
Date Deposited: 26 Sep 2006
Last Modified: 24 May 2010 09:50
URI: http://nal-ir.nal.res.in/id/eprint/2777

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