3D 헬름홀츠 솔버를 이용한 마이크로믹서 타입 연소기의 음향 특성 분석
This study conducted acoustic analysis using 3D Helmholtz solver to investigate the unique acoustic characteristics of a micromixer-type combustor which can impact combustion instability. In this study, two combustors were compared, a micromixer-type and a swirler-type. Both have a similar axial len...
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| Published in | 한국분무공학회지, 30(3) pp. 155 - 161 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | Korean |
| Published |
한국분무공학회
01.09.2025
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1226-2277 |
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| Summary: | This study conducted acoustic analysis using 3D Helmholtz solver to investigate the unique acoustic characteristics of a micromixer-type combustor which can impact combustion instability. In this study, two combustors were compared, a micromixer-type and a swirler-type. Both have a similar axial length scale but feature different nozzle geometries. Numerical analysis was conducted in two parts. First, we compared the acoustic modes of a micromixer-type combustor with a conventional swirler-type combustor. Second, we performed a parametric study by varying the nozzle count to quantify the impact of the multi-nozzle structure on thermo-viscous damping. The analysis reveals that smaller nozzle area of the micromixer-type combustor induces acoustic decoupling between the plenum and the combustion chamber. Additionally, the high perimeter-to-area ratio inherent in the multi-nozzle design significantly increased thermo-viscous damping. KCI Citation Count: 0 |
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| ISSN: | 1226-2277 |