A supersonic flow past a hemispherical nose with an opposing jet placed on its axis has been investigated using large eddy simulation. We find that the flow behaviors depend mainly on the jet total pressure ratio and can be classified into three typical flow regimes of unstable, stable and transition. The unstable flow regime is characterized by an oscillatory bow shock with a multi-jet-cell structure and the stable flow regime by a steady bow shock with a single jet cell. The transition regime lies between the unstable and stable ones with a complex flow evolution. Turbulence statistics are further analyzed to reveal the relevant turbulent behaviors in the three flow regimes. The results obtained in this study provide a physical insight into the understanding of the mechanisms underlying this complex flow.

LI-WEI CHEN

CHANG-YUE XU

XI-YUN LU

Modern Physics Letters B

MPLB 为凝聚态物理、统计物理以及原子、分子和光学物理中重要和有用的研究成果的快速传播开辟了渠道。重点关注当前感兴趣的主题，例如冷原子和分子、新拓扑材料和相，以及新型低维材料。该杂志还包含一个简要评论部分，目的是发表关于最新实验发现和紧急新理论发展的简短报告。

Modern Physics Letters B provides a rapid dissemination channel for significant and useful research findings in condensed matter physics, statistical physics, and atomic, molecular, and optical physics. The journal focuses on current topics of interest, such as cold atoms and molecules, new topological materials and phases, and novel low-dimensional materials. It also includes a brief commentary section aimed at publishing short reports on recent experimental discoveries and urgent new theoretical developments.

《Modern Physics Letters B》为凝聚态物理、统计物理以及原子、分子和光学物理领域的重要研究成果提供了快速传播的渠道。该期刊重点关注当前的热门主题，如冷原子与分子、新型拓扑材料及其相态，以及新型低维材料。此外，期刊还设有简要评论部分，旨在发表关于最新实验发现和紧急新理论发展的简短报告。

Category	Quartile
物理与天体物理	4
物理与天体物理, 物理应用	4
物理与天体物理, 物理凝聚态物理	4
物理与天体物理, 物理数学物理	4

LARGE-EDDY SIMULATION OF OPPOSING-JET-PERTURBED SUPERSONIC FLOWS PAST A HEMISPHERICAL NOSE

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Journal Info

Category	Quartile
PHYSICS, MATHEMATICAL	2