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Subgrid Combustion Modeling For The Next Generation National Combustion Code
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Book Synopsis Subgrid Combustion Modeling for the Next Generation National Combustion Code by :
Download or read book Subgrid Combustion Modeling for the Next Generation National Combustion Code written by and published by DIANE Publishing. This book was released on 2003 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721009237 Total Pages :34 pages Book Rating :4.0/5 (92 download)
Book Synopsis Subgrid Combustion Modeling for the Next Generation National Combustion Code by : National Aeronautics and Space Administration (NASA)
Download or read book Subgrid Combustion Modeling for the Next Generation National Combustion Code written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-11 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the first year of this research, a subgrid turbulent mixing and combustion methodology developed earlier at Georgia Tech has been provided to researchers at NASA/GRC for incorporation into the next generation National Combustion Code (called NCCLES hereafter). A key feature of this approach is that scalar mixing and combustion processes are simulated within the LES grid using a stochastic 1D model. The subgrid simulation approach recovers locally molecular diffusion and reaction kinetics exactly without requiring closure and thus, provides an attractive feature to simulate complex, highly turbulent reacting flows of interest. Data acquisition algorithms and statistical analysis strategies and routines to analyze NCCLES results have also been provided to NASA/GRC. The overall goal of this research is to systematically develop and implement LES capability into the current NCC. For this purpose, issues regarding initialization and running LES are also addressed in the collaborative effort. In parallel to this technology transfer effort (that is continuously on going), research has also been underway at Georgia Tech to enhance the LES capability to tackle more complex flows. In particular, subgrid scalar mixing and combustion method has been evaluated in three distinctly different flow field in order to demonstrate its generality: (a) Flame-Turbulence Interactions using premixed combustion, (b) Spatially evolving supersonic mixing layers, and (c) Temporal single and two-phase mixing layers. The configurations chosen are such that they can be implemented in NCCLES and used to evaluate the ability of the new code. Future development and validation will be in spray combustion in gas turbine engine and supersonic scalar mixing.Menon, Suresh and Sankaran, Vaidyanathan and Stone, ChristopherGlenn Research CenterMATHEMATICAL MODELS; TURBULENT FLOW; TURBULENT MIXING; MULTIPHASE FLOW; LARGE EDDY SIMULATION; TURBULENT COMBUSTION; REACTING FLOW; COMBUSTION CHEMISTRY; COMBUSTION
Book Synopsis Subgrid Combustion Modeling for the Next Generation National Combustion Code ... Nasa/cr--2003-212202 ... National Aeronautics and Space Admin by : United States. National Aeronautics and Space Administration
Download or read book Subgrid Combustion Modeling for the Next Generation National Combustion Code ... Nasa/cr--2003-212202 ... National Aeronautics and Space Admin written by United States. National Aeronautics and Space Administration and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On Subgrid Combustion Modeling for Large-eddy Simulations by : William Henry Calhoon (Jr.)
Download or read book On Subgrid Combustion Modeling for Large-eddy Simulations written by William Henry Calhoon (Jr.) and published by . This book was released on 1996 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of the National Combustion Code Towards Unsteady Mixing and Combustion Modeling by : Robert C. Ryder
Download or read book Application of the National Combustion Code Towards Unsteady Mixing and Combustion Modeling written by Robert C. Ryder and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Subgrid Scale Modeling in Turbulent Combustion by : Peyman Givi
Download or read book Subgrid Scale Modeling in Turbulent Combustion written by Peyman Givi and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sub-grid Combustion Modeling for Pre-mixed Turbulent Reacting Flows by : Thomas M. Smith
Download or read book Sub-grid Combustion Modeling for Pre-mixed Turbulent Reacting Flows written by Thomas M. Smith and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Subgrid Scale Combustion Modeling for Large Eddy Simulation of Premixed Flames by : Arash Hossein Zadeh
Download or read book Dynamic Subgrid Scale Combustion Modeling for Large Eddy Simulation of Premixed Flames written by Arash Hossein Zadeh and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Subgrid two-phase mixing and combustion modeling for large-eddy simulations, ASME 98-GT-227 by : Suresh Menon
Download or read book Subgrid two-phase mixing and combustion modeling for large-eddy simulations, ASME 98-GT-227 written by Suresh Menon and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the International Gas Turbine & Aeroengine Congress & Exhibition, Stockholm, Sweden, June 2 - June 5, 1998.
Book Synopsis Stabilization and Dynamic of Premixed Swirling Flames by : Paul Palies
Download or read book Stabilization and Dynamic of Premixed Swirling Flames written by Paul Palies and published by Academic Press. This book was released on 2020-07-03 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stabilization and Dynamic of Premixed Swirling Flames: Prevaporized, Stratified, Partially, and Fully Premixed Regimes focuses on swirling flames in various premixed modes (stratified, partially, fully, prevaporized) for the combustor, and development and design of current and future swirl-stabilized combustion systems. This includes predicting capabilities, modeling of turbulent combustion, liquid fuel modeling, and a complete overview of stabilization of these flames in aeroengines. The book also discusses the effects of the operating envelope on upstream fresh gases and the subsequent impact of flame speed, combustion, and mixing, the theoretical framework for flame stabilization, and fully lean premixed injector design. Specific attention is paid to ground gas turbine applications, and a comprehensive review of stabilization mechanisms for premixed, partially-premixed, and stratified premixed flames. The last chapter covers the design of a fully premixed injector for future jet engine applications. Features a complete view of the challenges at the intersection of swirling flame combustors, their requirements, and the physics of fluids at work Addresses the challenges of turbulent combustion modeling with numerical simulations Includes the presentation of the very latest numerical results and analyses of flashback, lean blowout, and combustion instabilities Covers the design of a fully premixed injector for future jet engine applications
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721527274 Total Pages :26 pages Book Rating :4.5/5 (272 download)
Book Synopsis National Combustion Code Parallel Performance Enhancements by : National Aeronautics and Space Administration (NASA)
Download or read book National Combustion Code Parallel Performance Enhancements written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-19 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Combustion Code (NCC) is being developed by an industry-government team for the design and analysis of combustion systems. The unstructured grid, reacting flow code uses a distributed memory, message passing model for its parallel implementation. The focus of the present effort has been to improve the performance of the NCC code to meet combustor designer requirements for model accuracy and analysis turnaround time. Improving the performance of this code contributes significantly to the overall reduction in time and cost of the combustor design cycle. This report describes recent parallel processing modifications to NCC that have improved the parallel scalability of the code, enabling a two hour turnaround for a 1.3 million element fully reacting combustion simulation on an SGI Origin 2000. Quealy, Angela and Benyo, Theresa (Technical Monitor) Glenn Research Center NASA/CR-2002-211340, E-13151, NAS 1.26:211340, AIAA Paper 2002-3706
Book Synopsis National Combustion Code: Parallel Implementation and Performance by :
Download or read book National Combustion Code: Parallel Implementation and Performance written by and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Combustion Code (NCC) is being developed by an industry-government team for the design and analysis of combustion systems. CORSAIR-CCD is the current baseline reacting flow solver for NCC. This is a parallel, unstructured grid code which uses a distributed memory, message passing model for its parallel implementation. The focus of the present effort has been to improve the performance of the NCC flow solver to meet combustor designer requirements for model accuracy and analysis turnaround time. Improving the performance of this code contributes significantly to the overall reduction in time and cost of the combustor design cycle. This paper describes the parallel implementation of the NCC flow solver and summarizes its current parallel performance on an SGI Origin 2000. Earlier parallel performance results on an IBM SP-2 are also included. The performance improvements which have enabled a turnaround of less than 15 hours for a 1.3 million element fully reacting combustion simulation are described.
Book Synopsis Sub-grid Combustion Modeling for Compressible Two-phase Flows by : Vaidyanathan Sankaran
Download or read book Sub-grid Combustion Modeling for Compressible Two-phase Flows written by Vaidyanathan Sankaran and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A generic formulation for modeling the sub-grid combustion in compressible, high Reynolds number, two-phase, reacting flows has been developed and validated. A sub-grid mixing/combustion model called Linear Eddy Mixing (LEM) model has been extended to compressible flows and used inside the framework of Large Eddy Simulation (LES) in this LES-LEM approach. The LES-LEM approach is based on the proposition that the basic mechanistic distinction between the convective and the molecular effects should be preserved for accurate prediction of the complex flow-fields such as those encountered in many combustion systems. In LES-LEM, all the physical processes such as molecular diffusion, small and large scale turbulent convection and chemical reaction are modeled separately but concurrently at their respective time scales. This multi-scale phenomena is solved using a two-scale numerical approach, wherein molecular diffusion, small scale turbulent convection and chemical reaction are grouped as small scale processes and the convection at the (LES grid) resolved scales are deemed as the large scale processes. Small-scale processes are solved using a hybrid finite-difference Monte-carlo type approach in a one-dimensional domain. Large-scale advection on the three-dimensional LES grid is modeled in a Lagrangian manner that conserves mass. Liquid droplets (represented by computational parcels) are tracked using the Lagrangian approach wherein the Newton's equation of motion for the discrete particles are integrated explicitly in the Eulerian gas field. Drag effects due to the droplets on the gas phase and the heat transfer between the gas and the liquid phase are explicitly included. Thus, full coupling is achieved between the two phases in the simulation. Validation of the compressible LES-LEM approach is conducted by simulating the flow-field in an operational General Electric Power Systems' combustor (LM6000). The results predicted using the proposed approach compares well with the experiments and a conventional (G-equation) thin-flame model. Particle tracking algorithms used in the present study are validated by simulating droplet laden temporal mixing layers. Comparison of the energy growth in the fundamental and sub-harmonic mode in the presence and absence of the droplets shows excellent agreement with spectral DNS. Finally, to test the ability of the present two-phase LES-LEM in simulating partially premixed combustion, a LES of freely propagating partially premixed flame in a droplet-laden isotropic turbulent field is conducted. LES-LEM along with the spray models correctly captures the flame structure in the partially premixed flames. It was found that most of the fuel droplets completely vaporize before reaching the flame, and hence provides a continuous supply of reactants, which results in an intense reaction zone similar to a premixed flame. Some of the droplets that did not evaporate completely, traverse.
Book Synopsis 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit July 11-14, 2004, Fort Lauderdale, FL.: 04-3350 - 04-3399 by :
Download or read book 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit July 11-14, 2004, Fort Lauderdale, FL.: 04-3350 - 04-3399 written by and published by . This book was released on 2004 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sub-grid Models for Large Eddy Simulation of Non-conventional Combustion Regimes by : Zhiyi Li
Download or read book Sub-grid Models for Large Eddy Simulation of Non-conventional Combustion Regimes written by Zhiyi Li and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis and Modeling Strategies for Subgrid Turbulence-Chemistry Interactions in High-Speed Combustion by : Paige Makenzie Drummond
Download or read book Analysis and Modeling Strategies for Subgrid Turbulence-Chemistry Interactions in High-Speed Combustion written by Paige Makenzie Drummond and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preview of National Combustion Code by : Robert M. Stubbs
Download or read book Preview of National Combustion Code written by Robert M. Stubbs and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: