Pressure Oscillations in a Single Stage Axial-Flow Low-Speed Compressor during Pre-Stall and Stall

Abstract

This paper describes the experimental investigations of high-frequency pressure oscillations in a single-stage axial-flow low-speed compressor during rotating stall where the main oscillating frequency is greater than that of rotor rotation and less than or equal (o that of the blade passing frequency. These oscillations are similar to the high-frequency oscillation processes in the flow of multi-stage axial-flow high-speed compressors and low-speed single-stage axial fans described in earlier literature.

Archive of Mechanical Engineering

“…The frequency response of this probe was 175 kHz . A more detailed description of the TSFP and its calibration procedure is given in the papers cited earlier [8,9]. The periodic multisampling and averaging technique was also employed with a high-response pressure sensor to get the phase-locked pressure distribution and its fluctuation on the casing wall.…”

“…Most of the experimental data focus on unsteady pressure measurements along the axis or around the circumference of the compressor outer wall (e.g. Nishioka et al [7], Levy and Pismenny [8], Levy et al [9] and Lepicovsky and Braunscheidel [10]). Motivated by the papers of the previous authors (e.g.…”