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Gas Turbines: Internal Flow Systems Modeling
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TLDR
In this article, a physics-first and design-oriented text describes and explains the underlying flow and heat transfer theory of secondary air systems and provides the reader with robust solution techniques, state-of-the-art three dimensional computational fluid dynamics (CFD) methodologies, and examples of compressible flow network modeling.Abstract:
This long-awaited, physics-first and design-oriented text describes and explains the underlying flow and heat transfer theory of secondary air systems. An applications-oriented focus throughout the book provides the reader with robust solution techniques, state-of-the-art three-dimensional computational fluid dynamics (CFD) methodologies, and examples of compressible flow network modeling. It clearly explains elusive concepts of windage, non-isentropic generalized vortex, Ekman boundary layer, rotor disk pumping, and centrifugally-driven buoyant convection associated with gas turbine secondary flow systems featuring rotation. The book employs physics-based, design-oriented methodology to compute windage and swirl distributions in a complex rotor cavity formed by surfaces with arbitrary rotation, counter-rotation, and no rotation. This text will be a valuable tool for aircraft engine and industrial gas turbine design engineers as well as graduate students enrolled in advanced special topics courses.read more
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Book
Gas Turbines for Electric Power Generation
TL;DR: In this paper, the authors present an accessible discussion of electric power generation with gas turbine power plants using quantitative and qualitative tools, including a discussion of thermodynamics of gas turbine cycles from a second law perspective.
Journal ArticleDOI
Performance enhancement of the gas turbine combined cycle by simultaneous reheating, recuperation, and coolant inter-cooling
TL;DR: In this article, three cases of coolant cooling were analyzed to compensate for the power deficit and improve the efficiency: coolant inter-cooling, coolant precooling and conventional intercooling.
Journal ArticleDOI
Transient modelling and simulation of gas turbine secondary air system
TL;DR: In this paper, the secondary air system of a two-spool turbofan engine is modelled and simulated in transient mode, under two pre-defined scenarios for step and scheduled boundary condition variations.
Book ChapterDOI
GivEn—Shape Optimization for Gas Turbines in Volatile Energy Networks
Jan Backhaus,Matthias Bolten,Onur Tanil Doganay,Matthias Ehrhardt,Benedikt Engel,Christian Frey,Hanno Gottschalk,Michael Günther,Camilla Hahn,Jens Jäschke,Peter Jaksch,Kathrin Klamroth,Alexander Liefke,Daniel Luft,Lucas Mäde,Vincent Marciniak,Marco Reese,Johanna Schultes,Volker Schulz,Sebastian Schmitz,Johannes Steiner,Michael Stiglmayr +21 more
TL;DR: The project GivEn is described that develops a novel multicriteria optimization process for gas turbine blades and vanes using modern "adjoint" shape optimization algorithms to enhance the exploration of Pareto-optimal solutions.
Posted Content
An analytical study in multi physics and multi criteria shape optimization
Hanno Gottschalk,Marco Reese +1 more
TL;DR: In this article, a simple multi-physical system for the potential flow of a fluid through a shroud in which a mechanical component, like a turbine vane, is modeled mathematically.
References
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Proceedings ArticleDOI
3D CFD Analysis of an Industrial Gas Turbine Compartment Ventilation System
TL;DR: In this paper, a detailed geometric model is developed by including the entire turbine casing, various pipelines, surfaces of inlet and exhaust plenums, roof (with ventilation air inlets and outlet) and walls.
Journal ArticleDOI
Probabilistic Analysis of the Secondary Air System of a Low-Pressure Turbine
Stefan Brack,Yannick Muller +1 more
TL;DR: In this article, a probabilistic analysis of the secondary air system of a three-stage low-pressure turbine rotor in a jet engine was performed to determine the uncertainty in the accomplishment of these tasks and to identify the major variation drivers.
Journal ArticleDOI
Discs and Drums: The Thermo-Fluid Dynamics of Rotating Surfaces
TL;DR: In this paper, the authors review long-term experimental and theoretical research programs concerned with flow and heat transfer over the large rotating surfaces, commonly discs, often drums but sometimes conical, used to support the blades in turbomachinery.
Journal ArticleDOI
Improving gas turbine power plant safety: the application of computational fluid dynamics to gas leaks
TL;DR: In this article, the authors describe how General Electric, working with W. S. Atkins, have responded to these concerns and how computational fluid dynamics simulations and field measurements have been used to study the effectiveness of gas turbine compartment ventilation and gas detection systems.