Results 261 to 270 of about 1,718,290 (313)

Secondary Air System Component Modeling for Engine Performance Simulations

Journal of Engineering for Gas Turbines and Power, 2008
Abstract This paper describes the modeling of typical secondary air system elements such as rotating orifices, seals, and flow passages with heat and work transfer from the surrounding surfaces. The modeling is carried out in an object-oriented simulation environment that allows the creation of different configurations in a simple and ...
A. Alexiou, K. Mathioudakis
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Secondary Air System

2018
D6 Secondary Air System In this Chapter we show how the very complex secondary air system in a modern gas turbine may be greatly simplified and integrated into a cycle model without compromising the quality of overall performance results. Calculation examples from single and multi-stage turbines are given which describe in detail how to account for ...
Joachim Kurzke, Ian Halliwell
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Secondary Air Systems in Aeroengines Employing Vortex Reducers

Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, 2001
A secondary air system in modern aero engines is required to cool the compressor and turbine discs and make sure that no hot gas ingestion occurs into the cavities between the turbine discs, which could cause an inadvertent reduction of disc life. A high integrity solution for guiding the air from the compressor to the turbine is through
Dimitrie Negulescu, Michael Pfitzner
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Probabilistic Analysis of Stationary Gas Turbine Secondary Air Systems

Volume 3: Heat Transfer, Parts A and B, 2006
In this paper probabilistic methods are applied to a 1D flow model of the Secondary Air System (SAS) of an industrial gas turbine. An overview of the methods applied and the results which can be provided by the probabilistic analysis is given. The paper especially deals with the problems that arise from the high number of probabilistic input parameters
Thomas Bischoff, Matthias Voigt, Ed Chehab, Konrad Vogeler   +3 more
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Carbon/air secondary battery system and demonstration of its charge-discharge

Journal of Power Sources, 2021
Abstract H2/H2O-power-to-gas-to-power (H2/H2O–P2G2P) systems that produce H2 by water electrolysis and generate electricity from this H2 are promising large-capacity electric energy storage systems for the extensive installation of renewable energy sources.
Keisuke Kameda, Sergei Manzhos, Manabu Ihara   +2 more
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Loss Prediction for Rotating Passages in Secondary Air Systems

Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, 1997
Modern heavy duty gas turbines operate with high turbine inlet temperatures, and thus require a complex secondary air system to ensure that the blades and vanes are supplied with the required amount of cooling air. Gas turbines with high thermal efficiency and with low emissions require minimum amounts of cooling and sealing air which means that the ...
Reichert, Arnd Wolfram, Brillert, Dieter, Simon, Heribert   +2 more
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Measurement and Analysis of Vitiation of Secondary Air in Air Distribution Systems (RP-1276)

HVAC&R Research, 2008
Appendix A of ANSI/ASHRAE Standard 62.1-2007, Ventilation for Acceptable Indoor Air Quality, describes the recycling of unvitiated ventilation air in a recirculating air-handling system. Equation A-2 considers air delivered through the primary air path (central air distribution system) and secondary air paths, such as fan-powered boxes or transfer-air ...
David P. Yuill, Grenville K. Yuill, Andrew H. Coward   +2 more
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An Integrated Approach to Simulate Gas Turbine Secondary Air System

Volume 7C: Heat Transfer, 2020
Abstract One of the most critical parts of a modern gas turbine that its reliability and performance has a great influence on cycle efficiency is the secondary air system (SAS). Modern systems functions to supply not only cooling air flow for turbine blades and vanes but sealing flow for bearing chambers and turbine segments as well as ...
Mahmoud Chizari, Seyed Hossein Madani, Seyed Vahid Hosseini, Ali Izadi   +3 more
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Automated Hex Meshing for Turbomachinery Secondary Air System

2013
In this paper, we present a novel process of creating hexahedral meshes for the turbomachinery secondary air system. The meshing process is automated from the geometry import to the mesh setup and requires minimum human interventions. The core of the process is a hexahedral meshing algorithm with a boundary layer mesh automatically created.
Feng Wang, Luca di Mare
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Process Automation for Aero Engine Secondary Air System Seal Design

Volume 7C: Heat Transfer, 2020
Abstract Secondary air system seals are crucial in aero engine design as they have a direct impact on specific fuel consumption. Their behavior is affected by several aspects of the physics of the system: the air system, the engine thermal physics, the effect of flight loads and several other effects.
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