Experimental Investigation of Self-excited Low-swirl Flame Dynamics with Different Blockage Ratios

被引：0

作者：

Gu, Jaheon ^{[1
]}

Moon, Kihun ^{[1
]}

Jegal, Hyunwook ^{[1
]}

Kim, Kyu Tae ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Aerosp Engn, Daejeon, South Korea

来源：

JOURNAL OF THE KOREAN SOCIETY OF COMBUSTION | 2022年 / 27卷 / 02期

关键词：

Blockage ratio; Combustion instability; Low-swirl injector; Gas turbine combustor; COMBUSTION INSTABILITY ANALYSIS; MODEL GAS-TURBINE; ACOUSTIC INTERACTIONS; MECHANISMS;

D O I：

10.15231/jksc.2022.27.2.046

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The influence of the blockage ratio on low-swirl flame dynamics was experimentally investigated in a lean-premixed combustor. Here we test five different swirl injectors, one with high swirl and four with low swirl, all with different blockage ratios (beta). We analyze a large experimental dataset of self-excited instability measurements, and show that instability amplitudes for the case of beta = 0.75 tend to be remarkably attenuated. This is attributed to the development of out-of-phase modulations between the jet-stabilized flame in the inner section and the swirl-stabilized flame in the outer section.

引用

页码：46 / 53

页数：8

共 23 条

[1] 차동진, 2015, [Journal of The Korean Society of Combustion, 한국연소학회지], V20, P10, DOI 10.15231/jksc.2015.20.4.010
[2] Scaling and development of low-swirl burners for low-emission furnaces and boilers
Cheng, RK
Yegian, DT
Miyasato, MM
Samuelsen, GS
Benson, CE
Pellizzari, R
Loftus, P
[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2000, 28 : 1305 - 1313
[3] VELOCITY AND SCALAR CHARACTERISTICS OF PREMIXED TURBULENT FLAMES STABILIZED BY WEAK SWIRL
CHENG, RK
[J]. COMBUSTION AND FLAME, 1995, 101 (1-2) : 1 - 14
[4] Combustion Characteristics by Plate Shape of Turbulence Generator in Low Swirl Combustor : Part I Non-reactive Isothermal Flow
Han, Minseok
Lee, Keeman
[J]. JOURNAL OF THE KOREAN SOCIETY OF COMBUSTION, 2020, 25 (01) : 1 - 11
[5] Bifurcation of flame structure in a lean-premixed swirl-stabilized combustor: transition from stable to unstable flame
Huang, Y
Yang, V
[J]. COMBUSTION AND FLAME, 2004, 136 (03) : 383 - 389
[6] Influence of asymmetric flame transfer functions on can-to-can acoustic interactions between two lean-premixed combustors
Jegal, Hyunwook
Gu, Jaheon
Li, Larry K. B.
Kim, Kyu Tae
[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2021, 38 (04) : 6051 - 6058
[7] A Study on the Flame Liftoff Height in a Lean-Premixed Low Swirl Combustor
Jeong, Hwanghui
Lee, Bok Jik
Han, Minseok
Lee, Keeman
[J]. JOURNAL OF THE KOREAN SOCIETY OF COMBUSTION, 2018, 23 (03) : 36 - 42
[8] A comparison of the flowfields and emissions of high-swirl injectors and low-swirl injectors for lean premixed gas turbines
Johnson, MR
Littlejohn, D
Nazeer, WA
Smith, KO
Cheng, RK
[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2005, 30 : 2867 - 2874
[9] Combustion dynamics of a low-swirl combustor
Kang, D. M.
Culick, F. E. C.
Ratner, A.
[J]. COMBUSTION AND FLAME, 2007, 151 (03) : 412 - 425
[10] Combustion instability feedback mechanisms in a lean-premixed swirl-stabilized combustor
Kim, Kyu Tae
[J]. COMBUSTION AND FLAME, 2016, 171 : 137 - 151

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