Simulation of Gas Turbine Engines, Design Off-Design and Dynamic Performance

Abstract

Continuous improvement of efficiency and performance of aircraft and power generation gas turbine systems during the past decades has led to engine designs that are subject to extreme load conditions. Despite the enormous progress in the development of materials, at the design point, the engine components operate near their aerodynamic, thermal, and mechanical stress limits. Under these circumstances, any adverse dynamic operation causes excessive aerodynamic, thermal, and subsequent mechanical stresses that may affect the engine safety and reliability, and, thus, the operability of the engine if adequate precautionary actions are not taken. Considering the above facts, an accurate prediction of the above stresses and their cause is critical at the early stage of design and development of the engine and its components.