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Publication . Article . Other literature type . 2014

Gas Turbine Engine Behavioral Modeling

Richard T. Meyer; Raymond A. DeCarlo; Steve Pekarek; Chris Doktorcik;
Open Access  
Published: 08 Jan 2014
Publisher: Purdue University
Country: United States
Abstract
This paper develops and validates a power flow behavioral model of a gas turbine engine (GTE) composed of a gas generator and free power turbine. The behavioral model is suitable for supervisory level (optimal) controller development of the engine itself or of electrical power systems containing gas-turbine-generator pairs as might be found in a naval ship or terrestrial electric utility plant. First principles engine models do not lend themselves to the supervisory level control development because of their high granularity. For the behavioral model, “simple” mathematical expressions that describe the engine's internal power flows are derived from an understanding of the engine's internal thermodynamic and mechanical interactions. These simple mathematical expressions arise from the balance of energy flow across engine components, power flow being the time derivative of energy flow. The parameter fit of the model to a specific engine such as the GE LM2500 detailed in this work utilizes constants and empirical fits of power conversion efficiencies obtained using data collected from a high-fidelity engine simulator such as the Gas Turbine Simulation Program (GSP). Transient response tests show that the two-norm normalized error between the detailed simulator model and behavioral model outputs to be 2.7% or less for a GE LM2500.
Subjects by Vocabulary

Microsoft Academic Graph classification: Transient response Engineering business.industry business Gas compressor Automotive engineering Gas generator Control theory Power management Electric power system Behavioral modeling Power (physics)

Subjects

Gas turbine engine, Behavioral model, Power flow Control model, Power management, Energy management, Simulation, Mechanical Engineering, Energy Engineering and Power Technology, Aerospace Engineering, Fuel Technology, Nuclear Energy and Engineering

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