Journal of Dalian Maritime University >
2016 , Vol. 42 >Issue 2: 91 - 95
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2016.02.015
Experimental investigation on the three-dimensional post-stall flow field before the rotor of an axial compressor
Received date: 2015-09-30
Revised date: 2015-12-31
Online published: 2015-12-31
An experiment about the before-rotor three-dimensional post-stall flow field was carried out on a low-speed axial compressor, the measurement extended to 8 times of chord length (or 60 percent of the casing diameter) in axial from before rotor, to obtain the whole flow field structure and supply abundant data for the study of the flow mechanism of stall cell. The original wall pressure signal is analyzed, from which the conclusion is drawn that the compressor is “abrupt stall”, there is only one stall cell during the stall process, of which the propagation speed is 37.7 percent of the rotor’s. Then the rotating five-hole pressure probe is used to measure the three-dimensional post-stall flow field, in the S1 stream plane the flow field can be divided into four zone partition, namely, primary flow zone, deflection zone, recirculation zone and strong shear zone. Near the rotor leading edge, recirculation grows at 30 percent of blade height with a high circumferential and radial rotating speed. Rotating speed in circumferential of the tip recirculation zone is obviously higher than the inflow velocity, owing to the rotor working. In the nearcase zone, recirculation extends to 5.5 times of chord length (or 40% percent of the casing diameter) in axial.
Key words： compressor; rotating stall; stall cell; before the rotor; post-stall flow field
ZHANG Qian , WANG Hong-wei . Experimental investigation on the three-dimensional post-stall flow field before the rotor of an axial compressor[J]. Journal of Dalian Maritime University, 2016 , 42(2) : 91 -95 . DOI: 10.16411/j.cnki.issn1006-7736.2016.02.015
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