Investigation on radiative heat flux distribution on the wall surface of the flame cylinder in the reflux combustion chamber
The combustor is a critical component of an aero-engine, and the distribution of wall heat flux is crucial for the engine's service life. This study measures radiative heat flux distribution characteristics on the flame tube wall surface in a reflux combustion chamber, and key findings show tha...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-10-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25010822 |
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| Summary: | The combustor is a critical component of an aero-engine, and the distribution of wall heat flux is crucial for the engine's service life. This study measures radiative heat flux distribution characteristics on the flame tube wall surface in a reflux combustion chamber, and key findings show that: Relative radiative heat flux (RRHF) generally decreases along the flow direction. Its magnitude at any specific position increases with both higher mass fuel-to-air ratio (α) and combustion chamber pressure (Pc); Below a specific α threshold (α ≤ 0.013), the reduction rate of radiative heat flux (RHFRR) difference between two key points (point-2 and point-3) is small. Above this threshold, this difference becomes significantly larger; The RHFRR along the flow path is influenced by both α and Pc. At low α, it increases with Pc, while at higher α, no clear trend with Pc alone emerges, indicating a complex interaction requiring further study. This research provide critical data support for optimizing wall thickness and cooling aperture arrangements in aero-engine reflux combustor flame tube. These findings significantly contribute to enhanced reliability in combustor thermal protection design. |
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| ISSN: | 2214-157X |