Open AccessBook
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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Book
The Engines of Pratt & Whitney: A Technical History
Jack Connors,Ned Allen +1 more
TL;DR: The Engines of Pratt & Whitney: A Technical History as discussed by the authors describes the evolution from piston engines to gas turbines by the engineers who created those engines, including hundreds of archival photographs, as well as over a dozen tables listing specifications and applications.
Book
Fluid Mechanics : An Intermediate Approach
TL;DR: Fluid Mechanics: An Intermediate Approach as mentioned in this paper addresses the problems facing engineers today by taking on practical, rather than theoretical problems, instead of following an approach that focuses on mathematics first.
Journal ArticleDOI
Direct-transfer preswirl system: A one-dimensional modular characterization of the flow
TL;DR: In this paper, the discharge behavior of a direct-transfer preswirl system has been investigated experimentally for different number of receiver holes and different inlet geometries, varying axial gap widths between stator and rotor and for rotational Reynolds numbers up to Re Φ =2.3×10 6.
Journal ArticleDOI
The Leakage Thru Straight and Slant Labyrinths and Honeycomb Seals
C. A. Meyer,J. A. Lowrie +1 more
TL;DR: Leakage tests have been run over a wide range of pressure ratios and clearances for several types of labyrinth seals and the results of these tests show some important differences compared to previous theory as mentioned in this paper.
Fundamentals of fluid sealing
TL;DR: In this article, the fundamentals of fluid sealing, including seal operating regimes, are discussed and the general fluid-flow equations for fluid sealing are developed, including the effects of geometry, surface deformations, rotation, and both laminar and turbulent flows.