Instytut Maszyn Przepływowych
im. Roberta Szewalskiego
Polskiej Akademii Nauk
Powołany w 1956 roku
Volume 70-72 (1976)
Opening address by the Chairman of the Organizing Committee Professor Jerzy Krzyżanowski
Panel Discussion 1: Investigations of Two-Phase Flows and their lnfluence on Turbine Stage Designing
Panel Discussion 2: Limits of Applicability of Theoretical Aerodynamics in Turbine Stage Designing
1976, Zeszyt 70-72
Abstract
The injection of additional mass stream into the main flow through the blading of turbomachines is intended to cool gas turbine blades operating in elevated temperatures, or to heat working medium of turbines for wet or slightly overheated steam. In wet steam turbine stages the injection of additional mass-flow - especially with the enthalpy higher than that of the main flow - has a positive effect ofincreasing the degree of the steam dehydration, causing besides the erosion decrease by disintegrating the condensated droplets.
The previous theoretical and experimental investigations [1, 2, 4, 5] concerned mainly the injection through slots in blade trailing edges or in their direct vicinity. They dealt with the flow losses determination and the influence of edge geometry upon the turbine stage efficiency.
The present experimental data supplemęnt the results of other authors. They were obtained during the examination of stator blade cascade while injecting additional mass-flow through blade trailing edges.
Keywords:
mass stream, gas turbine blades, heat working medium, turbine stage efficiency
FLUID-FLOW MACHINERY
Polish Academy of Sciences
