Abstract
Several new correlation-regression models of weight calculation for small-scale aircraft gas turbine engines are proposed for their conceptual design stage. A comparison of the obtained weight models with each other and with the Kuz’michev model is carried out. Based on the obtained results, conclusions about the feasibility and scope of their application are drawn. New correlation-regression models differ from each other in the number of input parameters, as well as in the accuracy of forecasting the weight. In the course of the work, a database of main data and thermodynamic parameters of turbofan engines (TFE) is created consisting of 92 small-scale TFEs with thrust less than 50 kN. Based on the collected statistics, formulas were obtained that allow calculating the weight at the initial stage of engine design. The error in calculating the weight by these models is in range from 10% to 30%.
Highlights
Weight estimation of gas turbine engine (GTE) is required at the initial design stages to calculate its technical and economic efficiency and to optimize its parameters
Correlation-regression models of weight are used at the initial stages of the design that are based on the statistical data of manufactured gas turbine engines
The accuracy of such models depends on the number of the engines involved in the statistics, the number of parameters used for calculation and the size of the engine
Summary
Weight estimation of gas turbine engine (GTE) is required at the initial design stages to calculate its technical and economic efficiency and to optimize its parameters. At later stages of the design, it is possible to use component models for calculating weight, and it is possible to estimate the weight based on layout drawings, which, cannot be done at the conceptual design stage due to insufficient information on the project In this regard, correlation-regression models of weight are used at the initial stages of the design that are based on the statistical data of manufactured gas turbine engines. These engines are used for light aircraft, unmanned aerial vehicles, cruise missiles, as auxiliary power units, and in the long term they are considered as a part of distributed power units. The purpose of this work is to develop new models of weight calculation for the initial stages of designing small-scale gas turbine engines, as well as in assessing the accuracy of the models obtained and determining the possibility of their further application
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