APPROXIMATION MODELS OF CRITERIA FOR EVALUATING SMALL GAS TURBINE EFFICIENCY FOR MULTIPURPOESE HELICOPTER

V.A. Grigoriev, V.M. Rad′ko, D.S. Kalabuhov

The one is initial design problems of small gas turbine engine with free turbine (SGTE FT) for multi-purpose helicopters – forming mathematical models of the criteria for evaluation SGTE FT are consideres. The drawbacks of existing methods for the formation of mathematical models are shown. Using the approximation method of least squares original data obtained in the performance of you, the numeral of the experiment were developed regression models of the main criteria for evaluating the effectiveness of multi-purpose helicopters, carrying passengers and vehicles work. These models are shown to be effective in optimizing the parameters SGTE FT in the helicopter and in defining the boundaries of local rational values areas of the workflow parameters.

Key words: small-sized engines, helicopter, approximation, regression model, the calculated experiment, performance measures, the extremum