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Abstract <p>Detonation wave propagation in narrow plane and square channels is numerically simulated. The development of instability of a plane detonation wave and the formation of an unsteady multifront structure are investigated, and the characteristics of this process are considered in two- and three-dimensional cases. It is shown that in the plane channel, the growth of transverse disturbances leads to the formation of a cellular structure, initially with small cells and then with larger ones. In the square channel, a so-called diagonal three-dimensional structure is formed, which, however, ultimately gives way to a spinning detonation regime. Its characteristics are studied, and the spin step size is estimated. Good agreement with the predictions of acoustic theory is demonstrated.</p>

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Numerical Simulation of the Formation of Spinning Detonation in a Square Channel

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • S. P. Borisov,
  • A. N. Kudryavtsev

摘要

Abstract

Detonation wave propagation in narrow plane and square channels is numerically simulated. The development of instability of a plane detonation wave and the formation of an unsteady multifront structure are investigated, and the characteristics of this process are considered in two- and three-dimensional cases. It is shown that in the plane channel, the growth of transverse disturbances leads to the formation of a cellular structure, initially with small cells and then with larger ones. In the square channel, a so-called diagonal three-dimensional structure is formed, which, however, ultimately gives way to a spinning detonation regime. Its characteristics are studied, and the spin step size is estimated. Good agreement with the predictions of acoustic theory is demonstrated.