Методика поверочных расчетов параметров замкнутых газотурбинных установок космического назначения

Abstract

The paper considers the methodology for checking calculations of parameters of space purpose closed-loop gas turbine units in various operating modes and changeable external conditions. The methodology is based on an algorithm for finding the conditions for the turbine-compressor joint operation in the energy conversion closed loop with subsequent clarification of the temperature of the working fluid at the inlet to the compressor. Finding the common operating point of the turbine and compressor is possible through using their universal flow-pressure characteristics obtained experimentally or calculated by the similarity methods of bladed machines. To clarify the temperature of the working fluid in front of the compressor, we also considered the conditions for ensuring a balance between the thermal power removed to the radiant cooler loop and the thermal power discharged by the radiant cooler into environment. The study briefly describes the software which implements the methodology and introduces the results of test calculations.