THEORETICAL INVESTIGATION OF TURBULENT COMBUSTION IN STRATIFIED INHOMOGENOUS MIXTURES USING DIRECT NUMERICAL SIMULATION
利用直接数值模拟对分层不均质混合物中的湍流燃烧进行理论研究
基本信息
- 批准号:EP/E026516/1
- 负责人:
- 金额:$ 18.74万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2007
- 资助国家:英国
- 起止时间:2007 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The aim of this project is to understand the effects of turbulence on hydrocarbon fuel combustion where the fuel and oxidizer distribution form a highly stratified mixture at the time of ignition. For stratified charge combustion the reactants are neither homogeneously mixed (premixed) nor completely separated (non- premixed). Thus the analysis of this kind of combustion has special modelling needs in comparison to fully premixed or fully non-premixed flames. Turbulent combustion in a stratified fuel-air mixture is highly relevant in the context of both spark-ignition gasoline and compression-ignition Diesel engines and has the potential for reducing fuel consumption especially at low-speed, light- load operations in automobile applications. Stratified-charge combustion can also be found in the Lean Premixed Prevaporised (LPP) combustors in aircraft gas turbines where fuel and injected secondary air form an inhomogeneous fuel-air mixture ahead of the flame front. The capability of predicting accurately the flame propagation behaviour in the presence of mixture inhomogeneities and intense turbulence would facilitate the development of low-emission, energy-efficient devices, such as automotive engines and gas-turbine combustors. The proposed research project consists of three parts. In the first, three-dimensional (3-D) Direct Numerical Simulations (DNS) with simplified chemistry, appropriate for the combustion of realistic hydrocarbon fuels, will be performed for a variety of mixing fields and turbulence intensities to enhance the present state of fundamental understanding and to create a database for the assessment of existing combustion models and to develop new models wherever necessary. Three-dimensional DNS with a reasonable degree of detailed chemistry will be carried out based on the information gained from 3-D DNS with simplified chemistry. The second part of the project involves the development of a combustion model in the context of Reynolds Averaged Navier Stokes (RANS) and Large Eddy Simulations (LES). The model will be implemented with a view to future incorporation into industry-standard Computational Fluid Dynamics (CFD) packages, which can then be used for engineering design purposes.
该项目的目的是了解湍流对碳氢燃料燃烧的影响,其中燃料和氧化剂分布在点火时形成高度分层的混合物。对于分层充气燃烧,反应物既不是均匀混合(预混),也不是完全分离(非预混)。因此,与完全预混或完全非预混火焰相比,这种燃烧的分析具有特殊的建模需求。分层燃料-空气混合物中的湍流燃烧在火花点火汽油和压缩点火柴油发动机的情况下都是高度相关的,并且具有降低燃料消耗的潜力,特别是在汽车应用中的低速、轻负载操作下。分层充气燃烧也可以在飞机燃气涡轮机中的贫预混合预蒸发(LPP)燃烧室中找到,其中燃料和喷射的二次空气在火焰前缘之前形成不均匀的燃料-空气混合物。准确预测混合物不均匀性和强烈湍流情况下火焰传播行为的能力将促进低排放、高能效设备的开发,如汽车发动机和燃气轮机燃烧室。拟议的研究项目包括三个部分。在第一,三维(3-D)直接数值模拟(DNS)与简化的化学,适用于现实的碳氢燃料的燃烧,将进行各种混合场和湍流强度,以提高目前的基本理解状态,并创建一个数据库,用于评估现有的燃烧模型,并在必要时开发新的模型。将根据从具有简化化学的3-D DNS获得的信息进行具有合理程度的详细化学的三维DNS。该项目的第二部分涉及在雷诺平均纳维尔-斯托克斯(RANS)和大涡模拟(LES)的背景下的燃烧模型的发展。该模型将被实施,以期未来纳入行业标准的计算流体动力学(CFD)软件包,然后可用于工程设计目的。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The relation between flame surface area and turbulent burning velocity in statistically planar turbulent stratified flames
统计平面湍流分层火焰中火焰表面积与湍流燃烧速度之间的关系
- DOI:10.1063/5.0031291
- 发表时间:2020
- 期刊:
- 影响因子:4.6
- 作者:Brearley P
- 通讯作者:Brearley P
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Nilanjan Chakraborty其他文献
Thermal Transport Regimes and Generalized Regime Diagram for High Energy Surface Melting Processes
- DOI:
10.1007/s11663-006-9000-7 - 发表时间:
2007-02-28 - 期刊:
- 影响因子:3.100
- 作者:
Nilanjan Chakraborty;Suman Chakraborty - 通讯作者:
Suman Chakraborty
Editorial: Impact of viral co-infection on cellular or human health and its clinical outcome
社论:病毒合并感染对细胞或人类健康的影响及其临床结果
- DOI:
10.3389/fcimb.2024.1399184 - 发表时间:
2024 - 期刊:
- 影响因子:5.7
- 作者:
Debsopan Roy;Nilanjan Chakraborty - 通讯作者:
Nilanjan Chakraborty
OC3: A Reactive Velocity Level Motion Planner with Complementarity Constraint-based Obstacle Avoidance for Mobile Robots
OC3:一种具有基于互补约束的移动机器人避障的反应速度级运动规划器
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Anirban Sinha;Riddhiman Laha;Nilanjan Chakraborty - 通讯作者:
Nilanjan Chakraborty
A comparative analysis of plasma and hydrogen effects on premixed ammonia combustion
等离子体和氢气对预混氨燃烧影响的比较分析
- DOI:
10.1016/j.combustflame.2025.114300 - 发表时间:
2025-09-01 - 期刊:
- 影响因子:6.200
- 作者:
Mohammad Shahsavari;Nilanjan Chakraborty;Alexander A. Konnov;Shenghui Zhong;Agustin Valera-Medina;Mehdi Jangi - 通讯作者:
Mehdi Jangi
Numerical investigation of laminar Rayleigh-Bénard convection of Bingham fluids in square cross-sectioned cylindrical enclosures
- DOI:
10.1016/j.ijthermalsci.2016.07.013 - 发表时间:
2016-12-01 - 期刊:
- 影响因子:
- 作者:
Sahin Yigit;Siqi Chen;Paul Quinn;Nilanjan Chakraborty - 通讯作者:
Nilanjan Chakraborty
Nilanjan Chakraborty的其他文献
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{{ truncateString('Nilanjan Chakraborty', 18)}}的其他基金
A combined experimental and numerical investigation of premixed flame-wall interaction in turbulent boundary layers
湍流边界层中预混火焰壁相互作用的实验与数值联合研究
- 批准号:
EP/V003534/1 - 财政年份:2021
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
Numerical exploration and modelling of novel environmentally friendly combustion technique: droplet-laden MILD combustion
新型环保燃烧技术的数值探索和建模:液滴负载 MILD 燃烧
- 批准号:
EP/S025154/1 - 财政年份:2019
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
Addressing Challenges Through Effective Utilisation of High Performance Computing - a case for the UK Consortium on Turbulent Reacting Flows (UKCTRF)
通过有效利用高性能计算应对挑战 - 英国湍流反应流联盟 (UKCTRF) 的案例
- 批准号:
EP/R029369/1 - 财政年份:2019
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
Adaptive software for high-fidelity simulations of multi-phase turbulent reacting flows
用于多相湍流反应流高保真模拟的自适应软件
- 批准号:
EP/P022286/1 - 财政年份:2017
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
HIGH PERFORMANCE COMPUTING SUPPORT FOR UNITED KINGDOM CONSORTIUM ON TURBULENT REACTING FLOWS (UKCTRF)
为英国湍流反应流联盟 (UKCTRF) 提供高性能计算支持
- 批准号:
EP/K025163/1 - 财政年份:2014
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
Fundamental understanding of turbulent flame propagation in droplet-laden reactant mixture based on experimental and numerical investigations
基于实验和数值研究对含液滴反应混合物中湍流火焰传播的基本理解
- 批准号:
EP/J021997/1 - 财政年份:2012
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
Development of scalar dissipation rate based reaction rate models for the large eddy simulations of premixed flames
开发基于标量耗散率的反应速率模型,用于预混火焰的大涡流模拟
- 批准号:
EP/I028013/1 - 财政年份:2011
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
Development of Unified Flame Surface Density Based Reaction Rate Models for the LES of Turbulent Premixed Flames
基于统一火焰表面密度的湍流预混火焰 LES 反应速率模型的开发
- 批准号:
EP/G008841/2 - 财政年份:2011
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
Development of Unified Flame Surface Density Based Reaction Rate Models for the LES of Turbulent Premixed Flames
基于统一火焰表面密度的湍流预混火焰 LES 反应速率模型的开发
- 批准号:
EP/G008841/1 - 财政年份:2009
- 资助金额:
$ 18.74万 - 项目类别:
Research Grant
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