International Journal of Spray and Combustion Dynamics最新文献_第5页

Response of spray number density and evaporation rate to velocity oscillations 喷雾数密度和蒸发率对速度振荡的响应

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221085957

S. Kulkarni, Camilo F. Silva, W. Polifke

{"title":"Response of spray number density and evaporation rate to velocity oscillations","authors":"S. Kulkarni, Camilo F. Silva, W. Polifke","doi":"10.1177/17568277221085957","DOIUrl":"https://doi.org/10.1177/17568277221085957","url":null,"abstract":"A theoretical investigation of the effect of gas velocity oscillations on droplet number density and evaporation rate is presented. Oscillations in gas velocity cause a number density wave, i.e. an inhomogeneous, unsteady variation of droplet concentration. The number density wave, as it propagates downstream at the mean flow speed, causes modulation of the local evaporation rate, creating a vapour wave with corresponding oscillations in equivalence ratio. The present work devises an analytical formulation of these processes. Firstly, the response of a population of droplets to oscillations in the gas velocity is modelled in terms of a number density wave. Secondly, the formulation is extended to incorporate droplet evaporation, such that an analytical expression for the evaporation rate modulation is obtained. Subsequently, the droplet 1D convection-diffusion transport equation with the calculated evaporation source term is solved using an appropriate Green’s function to determine the resulting equivalence ratio perturbations. The dynamic response of equivalence ratio fluctuations to velocity oscillations is finally characterized in terms of a frequency-dependent transfer function. The aforementioned analytical approach relies on a number of simplifying approximations, nevertheless it was validated with good agreement against 1D Euler-Lagrange CFD simulations.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"107 - 117"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45397802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stability criteria of two-port networks, application to thermo-acoustic systems 双端口网络的稳定性准则，在热声系统中的应用

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221088465

M. Kojourimanesh, V. Kornilov, I. Lopéz Arteaga, Philip de Goey

{"title":"Stability criteria of two-port networks, application to thermo-acoustic systems","authors":"M. Kojourimanesh, V. Kornilov, I. Lopéz Arteaga, Philip de Goey","doi":"10.1177/17568277221088465","DOIUrl":"https://doi.org/10.1177/17568277221088465","url":null,"abstract":"System theory methods are developed and applied to introduce a new analysis methodology based on the stability criteria of active two-ports, to the problem of thermo-acoustic instability in a combustion appliance. The analogy between thermo-acoustics of combustion and small-signal operation of microwave amplifiers is utilized. Notions of unconditional and conditional stabilities of an (active) two-port, representing a burner with flame, are introduced and analyzed. Unconditional stability of two-port means the absence of autonomous oscillation at any embedding of the given two-port by any passive network at the system's upstream (source) and downstream (load) sides. It has been shown that for velocity-sensitive compact burners in the limit of zero Mach number, the criteria of unconditional stability cannot be fulfilled. The analysis is performed in the spirit of a known criterion in microwave network theory, the so-called Edwards-Sinsky's criterion. Therefore, two methods have been applied to elucidate the necessary and sufficient conditions of a linear active two-port system to be conditionally stable. The first method is a new algebraic technique to prove and derive the conditional and unconditional stability criteria, and the second method is based on certain properties of Mobius (bilinear) transformations for combinations of reflection coefficients and scattering matrix of (active) two-ports. The developed framework allows formulating design requirements for the stabilization of operation of a combustion appliance via purposeful modifications of either the burner properties or/and of its acoustic embeddings. The analytical derivations have been examined in a case study to show the power of the methodology in the thermo-acoustics system application.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"82 - 97"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45932575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytical modelling of flame transfer functions for technically premixed flames 技术预混火焰传递函数的分析建模

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221094403

F. Biagioli, A. Innocenti, Ammar Lamraoui, K. Syed

{"title":"Analytical modelling of flame transfer functions for technically premixed flames","authors":"F. Biagioli, A. Innocenti, Ammar Lamraoui, K. Syed","doi":"10.1177/17568277221094403","DOIUrl":"https://doi.org/10.1177/17568277221094403","url":null,"abstract":"The linear response to harmonic acoustic excitation of the total heat release rate in technically premixed flames (Flame Transfer Function, FTF) is studied in case of an ideal swirl burner. The analysis is based on the linearization of the production rate for the mean reaction progress variable modelled with a turbulent flame speed closure. Three main components of the FTF are identified which are generated by: I) direct fluctuations in the fuel mixture fraction (formation enthalpy contribution), II) direct fluctuations in the turbulent flame speed and III) flame surface area fluctuations driven by velocity and turbulent flame speed fluctuations. The velocity fluctuation is separated into an irrotational acoustic displacement and a rotational convective component. The effect of the rotational velocity component on the FTF is modelled here in a semi-empirical way, related to swirl number fluctuations at the flame base due to the phase shift between convected tangential velocity fluctuations and acoustically propagating axial velocity fluctuations. It is finally shown that fuel mixture fraction fluctuations can be generated not only by air mass flow rate fluctuations but also by fuel flow rate fluctuations which depend upon the air side impedance at the fuel injection location. It is shown that this impedance changes with the geometry of the plenum placed upstream the burner affecting in this way also the FTF.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"42 - 54"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45723790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of shear-coaxial injector hydrodynamics on high-frequency combustion instabilities in a representative cryogenic rocket engine 剪切-同轴喷油器流体动力学对典型低温火箭发动机高频燃烧不稳定性的影响

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221093848

W. Armbruster, J. Hardi, M. Oschwald

{"title":"Impact of shear-coaxial injector hydrodynamics on high-frequency combustion instabilities in a representative cryogenic rocket engine","authors":"W. Armbruster, J. Hardi, M. Oschwald","doi":"10.1177/17568277221093848","DOIUrl":"https://doi.org/10.1177/17568277221093848","url":null,"abstract":"The excitation mechanism of a thermoacoustic instability in a 42-element research rocket thrust chamber with representative operating conditions with respect to European cryogenic rocket engines is investigated in detail. From previous research it was known that the chamber 1T mode can be excited by persistent heat release rate oscillations which are modulated by the resonant modes of the liquid oxygen injectors. The excitation source of the longitudinal injector eigenmodes is investigated in this study. Fibre-optical probes measuring the OH* dynamics from the recess volume of two injectors showed additional frequency content which could neither be explained by the chamber acoustics, nor the acoustics of the injection system. Instead, the temporal evolution of these frequencies correlate with the oxidizer flow velocity. In this work we show that the additional flame modulation originates from a hydrodynamic effect in the injection system. Even though the exact process cannot be precisely identified, an effect designated orifice whistling at the injector inlet orifice seems to be a likely candidate. Combining the new results with previous publications about this combustor, it is now possible to explain past and present observations in terms of the hydrodynamic and thermoacoustic conditions which are necessary for the combustion instability to appear. The conditions, which lead to an injection-driven excitation of the 1T mode are matching frequencies of the 2L mode of the injectors and the chamber 1T mode as well as a Strouhal number between 0.2 and 0.4 based on the length and flow velocity of the injector inlet orifice.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"118 - 130"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48455413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

On the convective wave equation for the investigation of combustor stability using FEM-methods 用有限元法研究燃烧室稳定性的对流波动方程

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221084470

Gerrit Heilmann, T. Sattelmayer

{"title":"On the convective wave equation for the investigation of combustor stability using FEM-methods","authors":"Gerrit Heilmann, T. Sattelmayer","doi":"10.1177/17568277221084470","DOIUrl":"https://doi.org/10.1177/17568277221084470","url":null,"abstract":"Solving the Helmholtz equation with spatially resolved finite element method (FEM) approaches is a well-established and cost-efficient methodology to numerically predict thermoacoustic instabilities. With the implied zero Mach number assumption all interaction mechanisms between acoustics and the mean flow velocity including the advection of acoustic waves are neglected. Incorporating these mechanisms requires higher-order approaches that come at massively increased computational cost. A tradeoff might be the convective wave equation in frequency domain, which covers the advection of waves and comes at equivalent cost as the Helmholtz equation. However, with this equation only being valid for uniform mean flow velocities it is normally not applicable to combustion processes. The present paper strives for analyzing the introduced errors when applying the convective wave equation to thermoacoustic stability analyses. Therefore, an acoustically consistent, inhomogeneous convective wave equation is derived first. Similar to Lighthill’s analogy, terms describing the interaction between acoustics and non-uniform mean flows are considered as sources. For the use with FEM approaches, a complete framework of the equation in weak formulation is provided. This includes suitable impedance boundary conditions and a transfer matrix coupling procedure. In a modal stability analysis of an industrial gas turbine combustion chamber, the homogeneous wave equation in frequency domain is subsequently compared to the Helmholtz equation and the consistent Acoustic Perturbation Equations (APE). The impact of selected source terms on the solution is investigated. Finally, a methodology using the convective wave equation in frequency domain with vanishing source terms in arbitrary mean flow fields is presented.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"55 - 71"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45486144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid CFD/low-order modeling of thermoacoustic limit cycle oscillations in can-annular configurations 罐环结构中热声极限环振荡的混合CFD/低阶建模

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221085953

M. Haeringer, W. Polifke

{"title":"Hybrid CFD/low-order modeling of thermoacoustic limit cycle oscillations in can-annular configurations","authors":"M. Haeringer, W. Polifke","doi":"10.1177/17568277221085953","DOIUrl":"https://doi.org/10.1177/17568277221085953","url":null,"abstract":"We propose a hybrid strategy for modeling non-linear thermoacoustic phenomena, e.g. limit-cycle (LC) oscillations, in can-annular combustion systems. The suggested model structure comprises a compressible CFD simulation limited to the burner/flame zone of one single can, coupled to a low-order model (LOM) representing the remaining combustor. In order to employ the suggested strategy for modeling non-linear phenomena like LC oscillations, the LOM must capture non-linear flame dynamics in the cans, which are not resolved by CFD. Instead of identifying such non-linear flame models in preliminary simulations, we aim at learning the non-linear dynamics “on-the-fly”, while simulating the self-excited system under consideration. Based on the observation of flame dynamics in the CFD domain, the parameters of the employed non-linear models are estimated during run time. The present study reveals that block-oriented models, which comprise a linear dynamic part followed by a static non-linear function, are well suited for this purpose. The proposed hybrid model is applied to a laminar can-annular combustor. Results agree well with the monolithic CFD simulation of the entire combustor, while the computational cost is drastically reduced. The employed flame models, whose parameters are identified during the simulation of the self-excited LC oscillation, represent well the relevant non-linear dynamics of the considered flame.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"143 - 152"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49187342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The flame displacement speed: A key quantity for turbulent combustion and combustion instability 火焰位移速度是紊流燃烧和燃烧不稳定性的关键参数

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221081298

P. Palies

{"title":"The flame displacement speed: A key quantity for turbulent combustion and combustion instability","authors":"P. Palies","doi":"10.1177/17568277221081298","DOIUrl":"https://doi.org/10.1177/17568277221081298","url":null,"abstract":"Future combustion power and propulsion systems may operate in premixed regime enabling reduced fuel burn and reduced pollutant emissions. The turbulent premixed regime in those future combustion systems is likely to be in the corrugated regime where modeling the flame as a thin interface propagating into the fresh gas is made possible. The flame displacement speed is thus a key quantity for turbulent combustion in this regime. This quantity is also important for combustion instabilities. Indeed, the flame displacement speed S d combined to the flow speed v determines the flame surface location by determining the flame surface speed w s . The flame surface location has shown to play a major role on combustion instabilities. Research work have also demonstrated the role of the flame displacement speed on the flame response which is used for subsequent combustion instability prediction. In this context, the derivation of flame speed models and flame transfer function models based on this quantity are required. This paper presents the theoretical derivation of flame transfer function coefficients for swirling premixed flames in this context. The derivation is based on the definition of the flame speed for turbulent flame, its perturbed form for oscillating flow, and the kinematic flame-flow speed budget. The obtained results are compared to previous literature data and discussed. The effect of the flame angle, id est the effect of the swirl number on the flame response is also investigated. This works motivates detailed local measurements and simulations to evaluate flow-flame speed budget terms.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"47 1","pages":"4 - 16"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41246528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proceedings of the Symposium on Thermoacoustics in Combustion 燃烧热声学研讨会论文集

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221099785

M. Bothien

{"title":"Proceedings of the Symposium on Thermoacoustics in Combustion","authors":"M. Bothien","doi":"10.1177/17568277221099785","DOIUrl":"https://doi.org/10.1177/17568277221099785","url":null,"abstract":"The Symposium on Thermoacoustics in Combustion (SoTiC 2021) took place virtually from September 6-10, 2021. The organization of this year’s symposium was a collaboration of Mirko Bothien and Luca Magri, at that time Fellows of the Institute for Advanced Studies, with the Thermodynamics Institute, supported by a Scientific and an Organizing Committee and with contributions from the EU Training Networks MAGISTER and ANNULiGhT. A total of 170 participants attended the symposium, with 64 papers presented, making SoTiC 2021 one of the largest – if not, the largest – event with respect to combustion dynamics so far. Based on all contributions and the corresponding presentations the members of the Scientific Committee selected the 20 best articles to be published in this Special Issue. The symposium attracted interest from the technical and scientific community working in the field of combustion instabilities. Attendees enjoyed a week of interesting presentations on current research in the field of combustion instabilities in gas turbines and rocket engines that was inspiring and useful for the future research and development work of the participants. Since almost all presentations were held live and the opportunity for networking in the virtual “coffee” room with its discussion rooms was actively used, there was a very open and communicative atmosphere throughout the entire week, which at times made attendees forget the virtual format. I’d like to give a special thanks to all authors who contributed papers to the symposium, as well as the five invited speakers who provided specific views and experiences on combustion instabilities: Bruno Schuermans, ETH Zurich, Switzerland; Aimee Morgans, Imperial College London, United Kingdom; Marco Zedda, Rolls-Royce plc, United Kingdom; Thierry Poinsot, CNRS, Université de Toulouse, France; Jonas Moeck, Norwegian University of Science and Technology, Norway. I’d also like to thank all reviewers of this Special Issue for their expertise and time spent guaranteeing high quality contributions.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"3 - 3"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44257623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust combustor design based on flame transfer function modification 基于火焰传递函数修正的稳健性燃烧室设计

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221088422

J. G. V. von Saldern, J. M. Reumschüssel, J. P. Beuth, C. O. Paschereit, K. Oberleithner

{"title":"Robust combustor design based on flame transfer function modification","authors":"J. G. V. von Saldern, J. M. Reumschüssel, J. P. Beuth, C. O. Paschereit, K. Oberleithner","doi":"10.1177/17568277221088422","DOIUrl":"https://doi.org/10.1177/17568277221088422","url":null,"abstract":"Operation under stable conditions is an important prerequisite for gas turbine safety. While recent studies have focused primarily on acoustic design to avoid thermoacoustic instabilities, in the present study we shift the focus to improving stability margins by flame transfer function (FTF) modification. The flame transfer function of premixed flames is affected by various mechanisms such as variations in equivalence ratio, swirl fluctuations and shear layer instabilities. These mechanisms can be influenced by modifying parameters such as fuel distribution, injection location, swirl number or gas composition. Based on the Nyquist stability method we formulate criteria for how and at what frequencies the flame transfer function needs to be modified, in order to increase the stability margins of a thermoacoustic system. Gain and phase margin as well as the sensitivity function serve as measures of stability. The criteria are limited to single frequencies, which allows experimental FTF optimization with manageable effort. In the second part of this study it is shown that the Nyquist method can also be used as an efficient and compact way to determine whether the uncertainties of subsystems can affect the overall stability, without requiring eigenvalue calculations.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"186 - 196"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42672201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spray response on a model prefilmer under unsteady airflows of various frequencies 不同频率非定常气流下模型预膜器的喷雾响应

IF 1.6 4区工程技术

International Journal of Spray and Combustion Dynamics Pub Date : 2022-03-01 DOI: 10.1177/17568277221092987

T. Christou, B. Stelzner, N. Zarzalis

{"title":"Spray response on a model prefilmer under unsteady airflows of various frequencies","authors":"T. Christou, B. Stelzner, N. Zarzalis","doi":"10.1177/17568277221092987","DOIUrl":"https://doi.org/10.1177/17568277221092987","url":null,"abstract":"An appealing concept for jet engine combustors is the Lean Premixed Prevaporized (LPP) combustor, which operates at high pressures. The low NOx emissions achieved by lean combustion are one of the targets for modern aircraft engines. However, these types of combustors can introduce thermoacoustic instabilities that can potentially damage the engine and reduce its lifespan. Since the potential instabilities on the fuel spray characteristics, i.e. the spray mass flux, can affect the flame stability, the need arises to investigate the spray response under an unsteady airflow. For this study, a model prefilmer was experimentally investigated to produce a two-dimensional droplet flow without swirl flow. An acoustic forcing in the range of 100–500 Hz was introduced into the airflow, characterized by a hot wire Constant Temperature Anemometry (CTA) setup. Droplet characteristics, namely the droplet diameter distribution and velocity, were determined using a Phase Doppler Anemometry (PDA) setup, while the acquired data were phase-averaged in one period of the airflow oscillation. The influence of the excitation frequency and the air-to-liquid ratio (ALR) on the spray was studied: the spray responded to the acoustic excitation and therefore critical performance parameters, such as the spray mass flux, oscillated indicating potential problems regarding the flame stability.","PeriodicalId":49046,"journal":{"name":"International Journal of Spray and Combustion Dynamics","volume":"14 1","pages":"98 - 106"},"PeriodicalIF":1.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47686410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1