Abstract

Some results of the investigations carried out at the Institute of Turbomachinery, Technical University ol Łódź, on the test stand of the TM1-3 model turbine, with special attention paid to the side flołvs (secondary air flow system) in the chamber stages are discussed. In the experimental investigations an approach concerning the division of the main flow through the vanes and blade cascades into three zones was addressed. This approach was developed along with the simulation calculations. The paper is focused on an attempt to identify the flow through discharge holes in the turbine wheel by means of dynamic measurements of pressure variations in the chamber behind the rotor disc.