How does primary liquid break-up determine the downstream spray characteristics of airblast atomisers?
初级液体破碎如何决定鼓风雾化器的下游喷雾特性?
基本信息
- 批准号:EP/G01597X/1
- 负责人:
- 金额:$ 65.82万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2009
- 资助国家:英国
- 起止时间:2009 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Better fuel sprays {e.g. smaller drop sizes to improve evaporation, better 'patterns' - and low droplet 'clustering' in time - to avoid fuel rich zones for soot and NOx production, maintaining these qualities between idle to full power } are known to be a key to the design of greener aeroengines. Although fuel atomization is an old technology, remarkably little fundamental knowledge exists which would reliably answer the simple question: given this shape of atomizer, what kind of fuel spray would I produce? The answer must be able to explain how and why modifications of the order of a fraction of a millimeter to the atomiser radically changes the spray. To formulate the answer, we need better and more extensive measurement of the 'fundamental' processes than hitherto: and we must advance our ability to calculate the flow (waves, instabilities, ligament formation, 'pinch-off', etc.) from first principles - and check the advance against fundamental, simple yet representative sprays.The overall aim of the proposal is to generate new computational fluid dynamic (CFD) modelling strategies for the atomisation process of liquid jets in airblast atomisers with an emphasis to geometries used in combustion systems and aero-engines. Our approach will be to make novel time- and spatially- resolved measurements of the liquid, spray and gas motions in the primary breakup regions of co-flowing and cross-flow atomiser configurations using optical instrumentation. We will use these to evaluate the results of Large eddy simulations (LES) of two atomiser geometries, based on an open source CFD code, to predict the temporal development of the atomisation process, in terms of internal liquid flow and surrounding gas flow, liquid breakup and spray characteristics downstream of liquid jet intact length. We intend to establish the extent to which CFD can predict the three transitions - waves to ligaments to droplets - in primary atomization in these geometries, which is as yet completely untested and unknown. We will use the evaluated code to perform 'numerical experiments' with emphasis on the dense liquid core, where measurements are hard to make, to further elucidate the physics.
已知更好的燃料喷雾(例如,更小的液滴尺寸以改善蒸发、更好的“图案”-以及及时的低液滴“聚集”-以避免产生烟尘和NOx的富燃料区,在怠速到全功率之间保持这些品质)是设计更环保的航空发动机的关键。虽然燃油雾化是一项古老的技术,但几乎没有什么基础知识可以可靠地回答这个简单的问题:给定这种形状的雾化器,我会产生什么样的燃油喷雾?答案必须能够解释如何以及为什么对雾化器进行几分之一毫米的修改就能从根本上改变喷雾。为了给出答案,我们需要比迄今为止更好和更广泛地测量“基本”过程:我们必须提高我们计算流动(波,不稳定性,韧带形成,“夹断”等)的能力。该提案的总体目标是为空气雾化器中液体射流的雾化过程生成新的计算流体动力学(CFD)建模策略,重点是燃烧系统和航空发动机中使用的几何形状。我们的方法将是使新的时间和空间分辨测量的液体,喷雾和气体运动的主要破碎区域的同流和横流雾化器配置使用光学仪器。我们将使用这些来评估两个雾化器几何形状的大涡模拟(LES)的结果,基于开源CFD代码,预测雾化过程的时间发展,在内部液体流和周围气体流,液体破碎和液体射流完整长度下游的喷雾特性方面。我们打算建立的程度,计算流体动力学可以预测的三个过渡-波韧带液滴-在这些几何形状的初级雾化,这是尚未完全测试和未知的。我们将使用评估的代码进行“数值实验”,重点是稠密的液体核心,测量是很难的,以进一步阐明物理。
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)
Numerical and Experimental Evaluation of the Optical Connectivity Technique for Measurement of Liquid Breakup Length in Atomizers
用于测量雾化器中液体破裂长度的光学连接技术的数值和实验评估
- DOI:10.2514/6.2010-200
- 发表时间:2010
- 期刊:
- 影响因子:0
- 作者:Charalampous G
- 通讯作者:Charalampous G
Proper orthogonal decomposition of primary breakup and spray in co-axial airblast atomizers
- DOI:10.1063/1.5085416
- 发表时间:2019-04
- 期刊:
- 影响因子:4.6
- 作者:G. Charalampous;Constantinos Hadjiyiannis;Y. Hardalupas
- 通讯作者:G. Charalampous;Constantinos Hadjiyiannis;Y. Hardalupas
Proper Orthogonal Decomposition analysis of photographic and optical connectivity time resolved images of an atomising liquid jet
雾化液体射流的摄影和光学连接时间分辨图像的正确正交分解分析
- DOI:
- 发表时间:2011
- 期刊:
- 影响因子:0
- 作者:Charalampous G.
- 通讯作者:Charalampous G.
Application of Proper Orthogonal Decomposition to the morphological analysis of confined co-axial jets of immiscible liquids with comparable densities
- DOI:10.1063/1.4900944
- 发表时间:2014-11
- 期刊:
- 影响因子:4.6
- 作者:G. Charalampous;Y. Hardalupas
- 通讯作者:G. Charalampous;Y. Hardalupas
How do liquid fuel physical properties affect liquid jet development in atomisers?
- DOI:10.1063/1.4965447
- 发表时间:2016-10-01
- 期刊:
- 影响因子:4.6
- 作者:Charalampous, Georgios;Hardalupas, Yannis
- 通讯作者:Hardalupas, Yannis
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Yannis Hardalupas其他文献
Evaluation of an event-based camera for time-resolved imaging of primary atomization in an air-assist atomizer
- DOI:
10.1007/s00348-025-04009-w - 发表时间:
2025-04-03 - 期刊:
- 影响因子:2.500
- 作者:
Kuppuraj Rajamanickam;Yannis Hardalupas - 通讯作者:
Yannis Hardalupas
Spectral analysis of preferential concentration in turbulent flows: parametric dependence on Reynolds, stokes, and froude numbers
湍流中优先聚集的频谱分析:对雷诺数、斯托克斯数和弗劳德数的参数依赖性
- DOI:
10.1016/j.ijmultiphaseflow.2025.105222 - 发表时间:
2025-07-01 - 期刊:
- 影响因子:3.800
- 作者:
George H. Downing;Yannis Hardalupas - 通讯作者:
Yannis Hardalupas
Extinction strain rate suppression of the precessing vortex core in a swirl stabilised combustor and consequences for thermoacoustic oscillations
- DOI:
10.1016/j.combustflame.2019.09.031 - 发表时间:
2020-01-01 - 期刊:
- 影响因子:
- 作者:
Efstathios Karlis;Yushuai Liu;Yannis Hardalupas;Alexander M.K.P. Taylor - 通讯作者:
Alexander M.K.P. Taylor
An efficient dimensionality reduction approach for modelling cryogenic hydrogen release
- DOI:
10.1016/j.ijhydene.2024.10.182 - 发表时间:
2024-11-19 - 期刊:
- 影响因子:
- 作者:
Javad Mohammadpour;Sina Hasibi-Taheri;Jiaxin Zhang;Qingxin Ba;Xuefang Li;Yannis Hardalupas;Fatemeh Salehi - 通讯作者:
Fatemeh Salehi
A detailed CO<sub>2</sub>(<sup>1</sup>B<sub>2</sub>) chemiluminescence chemical kinetics model for carbon monoxide and hydrocarbon oxidation
- DOI:
10.1016/j.fuel.2022.124363 - 发表时间:
2022-09-01 - 期刊:
- 影响因子:
- 作者:
Yushuai Liu;Yannis Hardalupas;Alexander M.K.P. Taylor - 通讯作者:
Alexander M.K.P. Taylor
Yannis Hardalupas的其他文献
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{{ truncateString('Yannis Hardalupas', 18)}}的其他基金
Three-Dimensional Temporal Evolution of Primary Liquid Breakup in SPRAYs
喷雾中初级液体分解的三维时间演化
- 批准号:
EP/X026248/1 - 财政年份:2022
- 资助金额:
$ 65.82万 - 项目类别:
Fellowship
De-risking dentistry: Quantifying aerosols associated with routine dentistry to inform mitigation technology and operating practices
降低牙科风险:量化与常规牙科相关的气溶胶,为缓解技术和操作实践提供信息
- 批准号:
EP/V038141/1 - 财政年份:2020
- 资助金额:
$ 65.82万 - 项目类别:
Research Grant
Advanced Gas Turbine cycles for high efficiency and sustainable future conventional generation
先进的燃气轮机循环可实现高效率和可持续的未来传统发电
- 批准号:
EP/M015300/1 - 财政年份:2015
- 资助金额:
$ 65.82万 - 项目类别:
Research Grant
Droplet collisions and interaction with turbulent flows for powder manufacturing
粉末制造中的液滴碰撞和与湍流的相互作用
- 批准号:
EP/K019732/1 - 财政年份:2013
- 资助金额:
$ 65.82万 - 项目类别:
Research Grant
Droplet clouds in a box of turbulence
湍流箱中的水滴云
- 批准号:
EP/E029515/1 - 财政年份:2007
- 资助金额:
$ 65.82万 - 项目类别:
Research Grant
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衍射光学三维信息加密与隐藏的研究
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