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The structure and behavior of rotating stall cell were experimentally clarified in a diagonal flow fan. The specific-speed of the fan was 1140 (r/min, m3/min, m), and the total pressure-rise coefficient at design flow-rate was 0.345. The static pressure on outer casing wall and the total pressure at rotor inlet and outlet were measured using a high response pressure transducer. The measured data were processed by the use of DPLA technique, and the structure and behavior of rotating stall cell were obtained. As a result, the stall cell extent for circumferential and spanwise direction and the pressure distributions inside stall cell were clarified. The details of stall cell propagation were also shown.
The structure and behavior of rotating stall cells were experimentally clarified in a diagonal flow fan. The specific-speed of the fan was 1140 (r / min, m3 / min, m), and the total pressure-rise coefficient at design flow-rate The static pressure on outer casing wall and the total pressure at rotor inlet and outlet were measured using a high response pressure transducer. The measured data were processed by the use of DPLA technique, and the structure and behavior of rotating stall cell were As a result, the stall cell extent for circumferential and spanwise direction and the pressure distributions inside stall cells were clarified. The details of stall cell propagation were also shown.