Open AccessCharacteristics of One Stage Radial Centrifugal Turbine
Author(s) -
Mihael Sekavčnik,
Matija Tuma,
D. Florjančič
Publication year - 1998
Publication title -
volume 1: turbomachinery
Language(s) - English
Resource type - Conference proceedings
DOI - 10.1115/98-gt-494
Subject(s) - centrifugal compressor , stator , turbine , mach number , rotor (electric) , turbomachinery , mechanical engineering , flow (mathematics) , stage (stratigraphy) , computer science , mechanics , gas compressor , engineering , physics , geology , paleontology
The paper concerns an investigation of the characteristics of one stage radial centrifugal turbines (RCT). A test turbine with parallel side walls and specific speed nqT ≈ 25 was designed as a special case due to simplicity of the execution. The tests were carried out with air, whrerby the flow, due to small Mach–number, could be considered as incompressible. For that purpose, a special test stand was built, which enables the measurement of required values. The effects of changing some cascade parameters of stator and rotor were investigated. The results of the measurements are presented in shell diagrams in dimensionless form and compared to each other. Paralell to the measurements some calculations of fluid flow in particular parts of RCT were carried out by using TASCflow package. On the basis of experimental and theoretical research an information of optimum RCT design has been obtained from the efficiency and pressure number point of view. The generalised shape of the shell diagrams shows the favourable characteristics particular to RCT, which opens new perspectives on the use of this type of turbine. There are numerous of possibilities of energy recuperation, to use the RCT, especially in a processing industry, which become due to ecological and also economical aspect very interessting.