Large eddy simulation of flame stabilization in a hollow supersonic combustor with parallel-cavity

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI:10.1016/j.icheatmasstransfer.2025.109816

Kaijing Jia , Chibing Shen , Zhiqun Meng , Haoming He , Zhuoling Liu , Luchang Liu

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Abstract

A square (SQ), rectangular (RE) and circular (CI) hollow supersonic combustor with parallel-cavity is proposed and investigated on the base configuration (BC) design by large eddy simulation (LES). At the parallel-cavity, the high temperature flame and subsonic zones are larger in RE than those in SQ and CI, but do not develop as well downstream as in SQ and CI. The total pressure recovery in CI is 0.70, which is the smallest total pressure loss among the four configurations. The fuel has high penetration ability and significant diffusion downstream in SQ and CI. The heat release power (HRP) of supersonic and diffusion combustion in SQ is 186.0 kW and 245.5 kW respectively, and the total HRP is 286.9 kW, which are the highest among the four configurations, increasing by 2.0 % compared to RE, 36.5 % compared to CI, and 3.5 % compared to BC. The rectangular and circular hollow walls facilitate supersonic-diffusion and supersonic-premixed combined combustion modes, respectively. There is better combustion with a pronounced peak of heat release in SQ, and a concentrated heat release in RE, while the heat release in CI is smoother throughout the space.

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平行腔中空超声速燃烧室火焰稳定的大涡模拟

提出了一种方形（SQ）、矩形（RE）和圆形（CI）空心平行腔超声速燃烧室，并利用大涡模拟（LES）对其基型设计进行了研究。在平行腔中，RE区的高温火焰和亚声速区比SQ和CI的大，但下游的发展不如SQ和CI的好。CI的总压恢复为0.70，是四种构型中总压损失最小的。燃料在SQ和CI中具有较高的穿透能力和显著的下游扩散。超音速燃烧和扩散燃烧的热释放功率（HRP）分别为186.0 kW和245.5 kW，总热释放功率为286.9 kW，是四种构型中最高的，比RE增加2.0%，比CI增加36.5%，比BC增加3.5%。矩形空心壁面和圆形空心壁面分别有利于超音速-扩散和超音速-预混组合燃烧模式。燃烧效果较好，SQ的放热峰值明显，RE的放热较为集中，而CI的放热在整个空间内较为平稳。

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.