[Oral Presentation]Numerical investigation on premixed NH3/H2/air flame stability of a microscale Swiss-roll combustor with a bluff-body

Numerical investigation on premixed NH3/H2/air flame stability of a microscale Swiss-roll combustor with a bluff-body

ID：3 Submission ID：70 View Protection：ATTENDEE Updated Time：2025-10-02 22:06:29 Hits：77 Oral Presentation

Start Time：2025-10-12 16:40 （Asia/Shanghai）

Duration：15min

Session：[S6] Numerical methods in multiscale and multi-physics modeling » [S6-2] Session 6-2

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Abstract

The present study numerically investigates the stability of NH₃/H₂/air premixed flames in a microscale Swiss-roll combustor with a bluff-body. The results demonstrate that the hydrogen blending and the addition of bluff-body in Swiss-roll combustor significantly improve flame stability. Moreover, a novel flashback phenomenon at high inlet velocities was observed under high hydrogen blending ratios (30% and above). This phenomenon is caused by enhanced heat recirculation due to elongated flame structures at high inlet velocities.

Keywords

Bluff-body,Heat recirculation,Flashback under high velocity,Micro Swiss-roll combustor

Speaker

Wanhao Liu

Huazhong University of Science and Technology, China

Submission Author

Wanhao Liu Huazhong University of Science and Technology

Aiwu Fan Huazhong University of Science and Technology