Stroemungsanalyse der Einzelstufen einer mehrstufigen Turbine und eines mehrstufigen Verdichters einer Gasturbine zur Verbesserung der Stroemungsrechenverfahren Abschlussbericht

The calculation of the flow through multistage compressors and turbines using currently available numerical methods is still unsatisfactory. Common methods can be classified as follows: (1) for individual cascades: 2D through-flow schemes on S1 and/or S2 flow surfaces; 3D through-flow schemes; (2) for multistage arrangements: 2D flow calculating methods (e.g. duct flow, actuator disk); Q3D through-flow schemes with iterative coupling of the S1-S2 flow surface calculation. In general, these methods initially calculate the inviscid flow. Then this solution is approximated to the viscous real flow by means of empirical loss models. Taking into account real, three-dimensional flow effects in flow calculation methods, among others in the form of loss and deflection correlations, is of great importance to the validation of new developments. The flow parameters calculated using the above methods and including frictional effects, effects of cooling air injection and the spatial character of flow, such as flow velocity, pressure and temperature values in the flow channel, losses and their distribution in the radial and circumferential directions as well as other flow parameters want confirmation by measurements in the machine. Within the scope of this project detailed measurements had to be conducted, which are compiled in the form of a comprehensive substantiated data base for verification and further improvement of existing flow calculating methods and those to be developed in the future. This paper is intended as a contribution to a combined experimental-theoretical approach with the objective of deepening the knowledge of the overall sequence of aerodynamic processes in multistage turbomachinery. (orig.)SIGLEAvailable from TIB Hannover: F95B1547+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman