Research for turbocompressors with general impeller for their application in gas turbine engines and power plants

Vladimir Shkabura

Abstract


To develop engines and power plants, the issues of improving small-sized engines through the use of a new type of turbomachines – turbo-compressors with general impeller (TCG) have been considered. Another name for this type of turbomachine is a single-disk turbo-compressor (STC), although for bladed machines, it is not the disk that is important, but the entire impeller. The article shows a diagram of the simplest gas turbine engine using TCG. Depending on the direction of gas flow, turbocompressors with a general impeller can have two flow patterns in the inter-blade space of the impeller: direct flow and counterflow. If the directions of the gas and air flows coincide with respect to the axis of rotation of the impeller, then the flow pattern in the TCG is direct flow, with the opposite flow – counterflow. To implement a particular flow scheme in the impeller, the appropriate shape of the impeller blades and the location of the nozzle, exhaust, suction, and discharge channels relative to each other must be selected. To perform an enlarged gas-dynamic calculation of the TCG, formulas are given to calculate the power of the turbine and compressor parts of the impeller. For the operation of the TCS as an independent unit, the turbine working channel must produce the necessary power for the operation of the compressor working channel to overcome mechanical losses in bearings and disk losses. The article shows the simplest scheme of using a turbocompressor with a common impeller as part of an aircraft gas turbine engine. The article presents formulas with correction factors for calculating the power factor of the compressor part and the turbine part’s load factor. The characteristics of the compressor part of the experimental model of the TCG were obtained in the process of calculation and experimental studies. The results of the tests of the compressor part of the experimental model of the TCG showed a good correlation between the calculated and experimental values. The conducted studies have shown that a turbocharger with a common impeller can be used in gas turbine engines, in the turbocharging system of internal combustion engines, and in power plants.

Keywords


of turbo-compressor with general impeller; compressor part; turbine part; of gas turbine engine; flow patterns in the impeller

References


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DOI: https://doi.org/10.32620/aktt.2025.5.04