A Method for Determining the Conversion Factors to Convert Gas Turbine Engine Parameters to Normal Values Based on Test Results in a Thermal Pressure Chamber

The article presents a method for determining the normalizing coefficients of recalculation of the main technical parameters of a gas turbine engine when undergoing production testing. The method is based on the application of methods for planning a design experiment. The mathematical models of the output data of the engine, necessary for carrying out such an experiment, were obtained by means of static processing of the protocols of the previous tests that contained the results of direct measurements of the parameters in a thermal pressure chamber. The ambient conditions (atmospheric pressure and temperature) and the operating parameters (rotational frequency and effective power of the engine) were selected as variable factors of the experimental design. Depending on these factors, the normal values of the parameters and the normalizing conversion factors for fuel consumption, air consumption, gas temperatures in the flow part of the engine and other output data were determined analytically. The method was demonstrated by processing test results of the 9I56 engine.

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