NDLI: Computational Engineering Design for Micro-Scale Combustion Devices: A Thermally Improved Configuration

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Saddawi, Salwan David Kipouros, Timoleon Savill, Mark
Copyright Year	2013
Abstract	A multi-objective design optimisation study has been carried out with the objectives to improve the overall efficiency of the device and to reduce the fuel consumption for the proposed micro-scale combustor design configuration. In a previous study we identified the topology of the combustion chamber that produced improved behaviour of the device in terms of the above design criteria. We now extend our design approach, and we propose a new configuration by the addition of a micro-cooling channel that will improve the thermal behaviour of the design as previously suggested in literature. Our initial numerical results revealed an improvement of 2.6% in the combustion efficiency when we applied the micro-cooling channel to an optimum design configuration we identified from our earlier multi-objective optimisation study, and under the same operating conditions. The computational modelling of the combustion process is implemented in the commercial computational fluid dynamics package ANSYS-CFX using Finite Rate Chemistry and a single step hydrogen-air reaction. With this model we try to balance good accuracy of the combustion solution and at the same time practicality within the context of an optimisation process. The whole design system comprises also the ANSYS-ICEM CFD package for the automatic geometry and mesh generation and the Multi-Objective Tabu Search algorithm for the design space exploration. We model the design problem with 5 geometrical parameters and 3 operational parameters subject to 5 design constraints that secure practicality and feasibility of the new optimum design configurations. The final results demonstrate the reliability and efficiency of the developed computational design system and most importantly we assess the practicality and manufacturability of the revealed optimum design configurations of micro-combustor devices.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791855102
DOI	10.1115/GT2013-94599
Volume Number	Volume 1A: Combustion, Fuels and Emissions
Conference Proceedings	ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
Language	English
Publisher Date	2013-06-03
Publisher Place	San Antonio, Texas, USA
Access Restriction	Subscribed
Subject Keyword	Cooling Computational fluid dynamics Microscale devices Hydrogen Pareto optimization Fuel consumption Combustion Topology Modeling Optimization Engineering design Design Geometry Chemistry Algorithms Combustion chambers Reliability Mesh generation
Content Type	Text
Resource Type	Article

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