Exit Flowfield of an Embedded Stator in a Multistage Axial Flow Compressor
Autor: | B. Lakshminarayana, N. Suryavamshi, J. Prato |
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Rok vydání: | 1997 |
Předmět: | |
Zdroj: | Journal of Propulsion and Power. 13:169-177 |
ISSN: | 1533-3876 0748-4658 |
Popis: | A complete area traverse downstream of the second stator of the Pennsylvania State University Multistage Compressor Facility has been carried out at the peak ef ciency and peak pressure ratio operating conditions using a miniature (1.07-mm-diam) ve-hole probe and a thermocouple probe. Axial velocity, total pressure, and total temperature contours are presented and discussed at both operating conditions. Blade-to-blade pro les of total velocity and absolute ow angle presented at three representative radii show the effect of loading on the wake structure between the two operating conditions. The stator clearance ow and hub rotation result in ow underturning (from design), which persists up to 10% of the span from the hub. A region of low uid momentum develops on the suction side of the stator blade endwall (casing region) corner at both operating conditions. The low uid momentum region in the suction side casing endwall corner is identi ed as the dominant source of ow unsteadiness to the downstream rotor at both compressor operating conditions. This is seen in the distribution of apparent stresses, which are con ned to the wake region along most of the span, with the exception of the low uid momentum core in the endwall region where signi cant levels are reached across a substantial portion of the passage at both operating conditions. |
Databáze: | OpenAIRE |
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