Transonic Axial Compressor Using Laser Anemometry and Unsteady Pressure Measurements

Abstract

A laser anemometer and high-response pressure probes were used to study in detail the complex flow in a transonic axial compressor rotor at 20,000 rpm. The investigation was aimed at providing complete data on the internal flowfield at the design speed for peak efficiency, near compressor surge, and choke. Useful information is presented on flow vectors, three-dimensional shock waves, oscillating total pressures, blade wakes, and losses downstream of the rotor.