Accession Number : ADP005470

Title :   Experimental Investigation on Small Turboprop Behaviour under Compressor Rotating Stall for Different Inlet Flow Conditions,

Corporate Author : ALFA ROMEO S P A NAPLES (ITALY)*

Personal Author(s) : Colantunomi,S. ; Liotti,G.

Report Date : MAR 1987

Pagination or Media Count : 16

Abstract : This paper deals with an experimental investigations on compressor rotating stall and acoustic noise in a small turboprop. The intent of the study, undertaken in Alfa Romeo Avio using the engine test bed during the initial phase of the AR 318 turboprop development program, was to clarify the noisy and unstable behaviour of some engines at part-speeds. This report presents the overall performances of the centrifugal compressor, the time-dependent wall static pressure measurements to visualize impeller rotating stall regions on the compressor map, and the acoustic noise signals detected at the engine air-intake inlet. Finally, the engine performances in stalled compressor conditions are analyzed and main results discussed.

Descriptors :   *STALLING, *CENTRIFUGAL COMPRESSORS, TURBOPROP ENGINES, AIR INTAKES, ROTATION, PRESSURE MEASUREMENT, STATIC PRESSURE, MASS FLOW, IMPELLERS, ACOUSTIC MEASUREMENT, ITALY

Subject Categories : Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE