Analytical modelling of flame transfer functions for technically premixed flames

机械 燃烧室 湍流 预混火焰 火焰速度 增压室空间 物理 材料科学 层流火焰速度 热力学 燃烧 化学 有机化学
作者
Fernando Biagioli,Alessandro Innocenti,Ammar Lamraoui,Khawar J. Syed
出处
期刊:International Journal of Spray and Combustion Dynamics [SAGE Publishing]
卷期号:14 (1-2): 42-54 被引量:2
标识
DOI:10.1177/17568277221094403
摘要

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.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
sun_lin发布了新的文献求助10
刚刚
zzz完成签到,获得积分10
1秒前
2秒前
2秒前
Eternity完成签到,获得积分10
2秒前
3秒前
4秒前
寒冷寻桃完成签到 ,获得积分10
4秒前
QiJiLuLu完成签到,获得积分10
5秒前
英姑应助大力的诗蕾采纳,获得10
5秒前
6秒前
甜甜圈完成签到,获得积分10
6秒前
Akim应助动听的飞松采纳,获得10
7秒前
7秒前
8秒前
8秒前
dycdz完成签到,获得积分10
8秒前
chong0919发布了新的文献求助10
9秒前
9秒前
oblivious完成签到,获得积分10
10秒前
11秒前
大菊发布了新的文献求助10
11秒前
嗯哼哈哈完成签到 ,获得积分10
11秒前
12秒前
GBRUCE完成签到,获得积分10
12秒前
能干的邹完成签到 ,获得积分10
12秒前
击倒大树的风暴完成签到,获得积分10
12秒前
科研通AI2S应助Strange采纳,获得10
12秒前
自信的谷南完成签到,获得积分10
13秒前
英俊的铭应助qq采纳,获得10
13秒前
13秒前
13秒前
6543210完成签到,获得积分10
13秒前
14秒前
Zenobia发布了新的文献求助10
15秒前
17秒前
冷傲半烟完成签到,获得积分10
18秒前
18秒前
19秒前
小白白完成签到 ,获得积分10
21秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
Toward a Combinatorial Approach for the Prediction of IgG Half-Life and Clearance 500
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3969917
求助须知:如何正确求助?哪些是违规求助? 3514626
关于积分的说明 11175060
捐赠科研通 3249928
什么是DOI,文献DOI怎么找? 1795165
邀请新用户注册赠送积分活动 875617
科研通“疑难数据库(出版商)”最低求助积分说明 804891