DYNamic Turbine Engine Compressor Code (DYNTECC) - Theory and capabilities

Hale, Alan; Davis, Milt

doi:10.2514/6.1992-3190

Cited by 35 publications

(26 citation statements)

References 5 publications

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“…Other successful models, which allow the simulation of compressor instabilities and mainly used for aeronautic applications, are the DYNTECC model (DYNamic Turbine Engine Compressor Code) [28] and the ATEC model (Aerodynamic Turbine Engine Code), which extended the DYNTECC model to consider the whole gas turbine [29,30]. In particular, the DYNTECC model was applied to study axial-centrifugal compressors off-design behavior [31,32].…”

Section: Introductionmentioning

confidence: 99%

Analysis of biogas compression system dynamics

Morini¹,

Pinelli²,

Venturini³

2009

Applied Energy

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Section: Introductionmentioning

confidence: 99%

Analysis of biogas compression system dynamics

Morini¹,

Pinelli²,

Venturini³

2009

Applied Energy

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“…∂t is the partial derivative with respect to time, and ∂m is the partial derivative with respect to the mass coordinate. The gas density ρ and internal energy e are related to these quantities via the relations 2 , p= (γ-1) ρe (12) Here γ, the ratio of specific heats is assumed to be a constant greater than 1. The spatial coordinate r is related to the mass coordinate m via…”

Section: Methodsmentioning

confidence: 99%

“…Since it is impossible to guarantee that an engine can avoid such behavior during its operational lifetime, recovery from rotating stall and surge is an important issue facing the gas turbine designer. Because of this, significant efforts have been made to accurately simulate the performance of a compressor undergoing a surge transient [2]. As these techniques have developed, the focus increasingly has shifted toward extending these methods to surround the entire engine, and, thus, capture the important compressor-combustor interactions that occur during engine surge [3].…”

Section: Introductionmentioning

confidence: 99%

High-Resolution One-Dimensional Modeling of a Gas Turbine Combustor Using Eulerian-Lagrangian Method

Khodadadi¹,

Meymian²

2019

Preprint

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In this paper, a dynamic combustor model for inclusion into a one-dimensional full gas turbine engine simulation model, with high numerical accuracy is developed. Effects of dominant parameters, such as frequency and amplitude of the inlet air and fuel mass flow rate fluctuations, on outlet temperature of the combustion chamber, are investigated. The main goal of this research is to analyze the response of the gas turbine combustor to dynamic events that occur in the compressor. In the present work, for modeling combustion, the equations of chemical equilibrium (a second-law concept) are developed and applied to combustion-product mixtures. Thus the heat released from combustion is computed and used as a source term in the energy equation. Ignition effects either would be considered with a time lag equation as a source term in the energy equation. The combustor flammability limits are determined by using available experimental data for various gases and also Le Chatelier’s law. Source terms of governing equations are added using the operator splitting method. To operate this, the modified version of the PPM algorithm called PPMLR is used which solves the Euler equations in Lagrangian coordinates. At the end of each time step, results calculated in the Lagrangian coordinates would remap to the original Eulerian coordinate. The results revealed that to achieve a grid-independent solution, the accuracy of 0.002 m over the length of the combustion chamber should be applied. By reducing the accuracy of simulation, numerical diffusion causes a rise in flow temperature along with the combustion chamber. Through the dynamic modeling aspect, it is found that by increasing inlet fuel flow rate frequency up to 25 Hz, the amplitude of the fluctuations of outlet temperature, increases. Further increase in frequency up to 100 Hz, the amplitude of the fluctuations remains unchanged. However further increases in frequency from 100 Hz, causes amplitudes of outlet temperature fluctuations to decrease.

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“…The TESS has been adopted as the prototype simulation executive in NPSS project. 56,57 Davis 58 and Hale and Davis 59 describe the modeling technique, theory, and capabilities of a dynamic turbine engine compression code (DYNTECC). DYNTECC is a stage-by-stage simulation of axial compression system to analyze a generic compression system for single-and dual-spool systems.…”

Section: Detailed Engine Simulationmentioning

confidence: 99%

Survey of Advancements in Jet-Engine Thermodynamic Simulation

Sanghi

Lakshmanan

Sundararajan

2000

Journal of Propulsion and Power

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The art of engine simulation has come into existence with the advent of analog and digital computers and has become an integral part of any engine development program. It has attracted considerable attention from researchers because of the tremendous bene ts it offers not only in terms of cost reduction, but also because of the con dence it induces into the behavior of gas turbine being designed. A substantial number of works have been carried out in the eld of engine simulation and its design applications during the past 50 years. The present paper intends to give a comprehensive overview of the attempts that have been made by the earlier researchers, and the considerable amount of knowledge, database, and the expertise that has been made available. Nomenclature= mass ow rate W F = fuel ow rate c = ratio of speci c heats D = change/error in a quantity g m = spool mechanical ef ciency r = total pressure loss coef cient Subscripts ACC = engine accessories BP = bypass duct H, HP = high-pressurespool HPC = high-pressurecompressor HPT = high-pressureturbine L, LP = low-pressure spool LPC = low-pressure compressor LPT = low-pressure turbine nz = nozzle a = ambient conditions 1, 2, 3, = engine stations 4, 5, 6, . . .

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DYNamic Turbine Engine Compressor Code (DYNTECC) - Theory and capabilities

Cited by 35 publications

References 5 publications

Analysis of biogas compression system dynamics

Analysis of biogas compression system dynamics

High-Resolution One-Dimensional Modeling of a Gas Turbine Combustor Using Eulerian-Lagrangian Method

Survey of Advancements in Jet-Engine Thermodynamic Simulation

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