Modeling of Turbine Engine Axial-Flow Compressor and Turbine Characteristics

Abstract

This paper describes the concept of modeling the turbine engine axial-e ow compressor and turbine characteristics. The conception is based on the use of two variables to the approximation of these characteristics’ curves. It gives the possibility of modeling the whole area of their action and provides the utmost accuracy of their representation. The conception is original because it presents changes of a compressor and turbine’ s parameters of work in the unconventional coordinate system, as suggested by the authors. The accuracy of the conception of modeling has been tested on the exemplary characteristics of a compressor and turbine in a turbine engine. Research is carried out in the following spheres: 1 ) evaluation of the degradation of engine components’ ine uence on the turbomachinery working line, and 2 ) evaluation of the inefe ciency of the fuel supply system’ s ine uence on the change of the thermodynamic cycle’ s parameters in the stationary and transient states. This research will also include a nonlinear digital model of a turbine engine, and the conception of modeling characteristics of rotating components, and the mass accumulation in the subassemblies of the engine.