Generalized von Neumann criterion for flows with pulsed energy release and a change in the chemical composition of a gas mixture at a Mach stem

M. V. Chernyshov, M. M. Laptinskaya

Baltic State Technical University, St. Petersburg

Abstract: An analog of the von Neumann criterion is analytically derived and numerically studied for changing the type (regular or Mach) reflection of an oblique steady shock if there is a pulsed release or absorption of energy at the Mach reflection, as well as a change in chemical composition of gas mixture on a strong main (Mach) shock. The influence of those factors on the displacement of the generalized criterion obtained is estimated in comparison with the well-known case of flow without chemical reactions and effects of a real gas.

Keywords: regular and Mach reflection, von Neumann criterion, detonation.

Received: 08.07.2025
Revised: 29.08.2025
Accepted: 29.08.2025

DOI: 10.61011/PJTF.2026.01.61913.20437

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