Modification of the Elementary Mach Reflection Theory of an Oblique Shock Wave at a Rigid Wall

A modified version of the local theory of an oblique shock wave reflection at a rigid surface is presented, known as the elementary theory of Mach reflection (ETMR). Modification concerns solutions for pressure acting on the wall in the region adjacent to the Mach stem front. A good agreement is obtained with Henrych's and Glasstone's data, and with Henderson's measurements in a wide range of the incident wave intensities as well as in the whole range of its irregular interaction. The theory enables to remove the well known paradox of Mach reflection observed so far in the range of weak shock waves reflections, according to the classification introduced by von Neumann