The Method of Joint Structural and Parametric Optimization of Small-Scale Jet Engines

Further improvement of engines' efficiency is becoming increasingly challenging, especially for small-scale gas turbines. A promising approach to achieve this goal is to combine engine's structural optimization with a parametric optimization of its working process. The array of applications requiring small-scale gas turbines with the increasing values of working process parameters is constantly expanding. Even turbofan cores of full-size airliners are essentially becoming small-scale with ever-increasing bypass ratios. Thus, updating the mathematical models used for the optimization of engine's working process to better describe impact of sizing factor on the engine performance is becoming a pressing matter. This paper introduces the method of joint structural and parametric optimization of small-scale jet engines and describes the updates made to the mathematical models of engine components. Verification of the developed software code is done by comparing the optimization results with the commercially available turbofan DGEN 380 developed by Price Induction.