Experimental work carried out on a test compressor to demonstrate that the modified actuator disk model coupled to a blockage parameter may be used to predict the type of stall of a single compressor rotor is detailed. An axial flow compressor with a single stage and a hub/tip ratio of 0.667 with a single rotor was used. The machine was run at 990 revs/min, and the tip diameter of the rotor was 1.052 m. Pressure characteristics were based on time-averaged outer wall static pressures, and an overall flow coefficient was taken from the average axial velocity at the rotor inlet. Yaw, total head, static pressure, and hot-wire measurements were gathered with four different rotor designs. A model was developed for comparison with the data, using the actuator disk theory to obtain a differential equation for the performance of the rotor. Whether the rotor would encounter abrupt or progressive stall was found to be predictable with a map of the blockage parameter versus the overall flow coefficient.
Journal of Mechanical and Engineering Science
- Pub Date:
- December 1981
- Aerodynamic Stalling;
- Compressor Rotors;
- Fluid Mechanics and Heat Transfer