GETRAN: A generic, modularly structured computer code for simulation of dynamic behavior of aero- and power generation gas turbine engines
- Texas A and M Univ., College Station, TX (United States). Dept. of Mechanical Engineering
The design concept, the theoretical background essential for the development of the modularly structured simulation code GETRAN, and several critical simulation cases are presented in this paper. The code being developed under contract with NASA Lewis Research Center is capable of simulating the nonlinear dynamic behavior of single- and multispool core engines, turbofan engines, and power generation gas turbine engines under adverse dynamic operating conditions. The modules implemented into GETRAN correspond to components of existing and new-generation aero- and stationary gas turbine engines with arbitrary configuration and arrangement. For precise simulation of turbine and compressor components, row-by-row diabatic and adiabatic calculation procedures are implemented that account for the specific turbine and compressor cascade, blade geometry, and characteristics. The nonlinear, dynamic behavior of the subject engine is calculated solving a number of systems of partial differential equations, which describe the unsteady behavior of each component individually. To identify each differential equation system unambiguously, special attention is paid to the addressing of each component. The code is capable of executing the simulation procedure at four levels, which increase with the degree of complexity of the system and dynamic event. As representative simulations, four different transient cases with single- and multispool thrust and power generation engines were simulated. These transient cases vary from throttling the exit nozzle area, operation with fuel schedule, rotor speed control, to rotating stall and surge.
- OSTI ID:
- 6960236
- Journal Information:
- Journal of Engineering for Gas Turbines and Power; (United States), Vol. 116:3; ISSN 0742-4795
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
GAS TURBINE ENGINES
COMPUTERIZED SIMULATION
DYNAMICS
G CODES
STRESS ANALYSIS
THERMAL STRESSES
COMPUTER CODES
ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MECHANICS
SIMULATION
STRESSES
200104* - Fossil-Fueled Power Plants- Components
330103 - Internal Combustion Engines- Turbine
990200 - Mathematics & Computers