Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 63 for “"Reacting flows"”.
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Spatio-temporal adaptive algorithm for reacting flows
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Modeling moderately dense to dilute multiphase reacting flows
Computational modeling of multiphase flows consists of two broader sets of methods: resolved approaches where the multiphase entities (MPE) are larger and resolved on the computational grid, and dispersed approaches where the MPEs are relatively small and not resolved on the grid but they are …
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Conditional source-term estimation methods for turbulent reacting flows
Conditional Source-term Estimation (CSE) methods are used to obtain chemical closure in turbulent combustion simulation. A Laminar Flamelet Decomposition (LFD) and then a Trajectory Generated Low-Dimensional Manifold (TGLDM) method are combined with CSE in Reynolds-Averaged Navier Stokes (RANS) …
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Unstructured mesh - finite volume algorithms for swirling, turbulent, reacting flows
… velocity coupling. In the simulation of swirling flows it is shown that both the standard and ReNormalisation Group k-e models fail to accurately predict turbulent effects. An anisotropic hybrid (k-e and mixing length) model is developed which produces excellent numerical results for the flows of …
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Computational Simulation of Detonation Waves and Model Reduction for Reacting Flows
… involved in the numerical simulations of reacting flows is also proposed and demonstrated.
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SIMULATION OF COMPLEX MULTIPHASE, MULTI-COMPONENT, REACTING FLOWS IN POROUS MEDIA
… of multi-component, multiphase chemically reacting flows in porous media, with particular application to the spontaneous combustion of coal and the extraction of coalbed methane. These two related problems involve complex multiphase, multi-component flow in a porous medium. Chemical …
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Numerical simulation of reacting flows with complex chemistry using flame embedding
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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A fast 3D particle method for simulations of buoyant and reacting flows
… algorithm by solving a number of buoyant and reacting flow problems.
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A dual-junction thermocouple probe for compensated temperature measurement in reacting flows
… resolved temperature data in turbulent reacting flows. Such a system would allow for increased understanding of turbulent reacting flows without the need for a costly and complex optical system. The system under study uses the responses of two thermocouples of different sizes placed in …
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Direct and large-eddy simulation of interactions between reacting flows and evaporating droplets
Reacting flows interacting with liquid droplets are of practical and scientific importance due to their appearance in a multiplicity of industrial and domestic applications such as fire suppression systems and humidified gas turbines. Experimental measurements are usually limited to global …
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Numerical Methods for Simulation and Optimization of Chemically Reacting Flows in Catalytic Monoliths
The aim of this work is to develop numerical methods and software for simulation and optimization of complex processes in catalytic monoliths to achieve better understanding of the physic-chemical processes in catalytic reactors. The fluid dynamics are modelled by the boundary layer equations …
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Design and testing of a facility to study mixing augmentation in reacting flows
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Reduction of convective heat transfer from reacting flows by application of electric fields
The electric field-induced reduction of heat transfer from a rod-stabilized diffusion flame and a step-stabilized premixed flame was investigated. The fuel examined was propane. Inlet velocity for the diffusion mode was a nominal value of 3.4 m/s with nominal air/fuel ratios of 420, 320, and 270. …
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Quantitative measurements of temperature using laser-induced thermal grating spectroscopy in reacting and non-reacting flows
… (LITGS) as a tool for thermometry in reacting and non-reacting flows. LITGS signals, which require resonant excitation of an absorbing species in the measurement region to produce a thermal grating, are acquired for systematic measurements of temperature in high pressure flames using …
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Design and testing of a lobed mixer for the study of mixing enhancement in reacting flows
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Global stability and control of swirling jets and flames
… role in the dynamics of many practical flows, such as those found in gas turbine combustion chambers. This thesis is concerned primarily with large-scale unsteady structures that arise due to self-sustained hydrodynamic oscillations, also known as global hydrodynamic instability. Direct …
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Neural network estimation of disturbance growth and flow field structure of spatially excited jets
… networks to predict flowfield structure in non-reacting flows is expected to be directly applicable to estimation and control of reacting flows in combustors.
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Experimental Investigation of Flow and Wall Heat Transfer in an Optical Combustor for Reacting Swirl Flows
… better understanding of combustion in swirl flows and thermal energy transfer from the turbulent reacting flows to solid surfaces. Therefore, accurate measurement and prediction of the flows and heat loads are indispensable. This dissertation presents flow details and wall heat flux …
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Development and Application of Gas-phase Raman Spectroscopy Techniques for Analysis of Carbon Nanotube Synthesis Processes
… high-resolution tool for analysis of non-reacting gaseous mixtures. Based on experimental results, its application for analysis of reacting flows was deemed to be limited due to localised changes in refractive index in reacting flows. A comprehensive model was derived, which was able to …
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