Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Refraction of Oblique Shock Wave on a Tangential Discontinuity

Version 1 : Received: 22 June 2021 / Approved: 22 June 2021 / Online: 22 June 2021 (14:26:45 CEST)

How to cite: Bulat, P.; Melnikova, A.; Volkov, K.; Upyrev, V. Refraction of Oblique Shock Wave on a Tangential Discontinuity. Preprints 2021, 2021060546 (doi: 10.20944/preprints202106.0546.v1). Bulat, P.; Melnikova, A.; Volkov, K.; Upyrev, V. Refraction of Oblique Shock Wave on a Tangential Discontinuity. Preprints 2021, 2021060546 (doi: 10.20944/preprints202106.0546.v1).

Abstract

Refraction of an oblique shock wave on a tangential discontinuity dividing two gas flows with different properties is considered. It is shown that its partial reflection occurs excepting of geometrical diffraction of an oblique shock. Another oblique shock, expansion wave or weak discontinuity that coincides with Mach line, can act as a reflected disturbance. This study focuses on relationships which define the type of reflected discontinuity and its parameters. Domains of existence of various shock-wave structures with reflected disturbances of two types and boundaries between them are defined. The domains of parameters with one or two solutions exist for the characteristic refraction. Conditions of the regular refraction and the Mach refraction are formulated, and boundaries between those two refraction types are defined for various types of gases. Refraction phenomena in various engineering problems (hydrocarbon gaseous fuel and its combustion products, diatomic gas, fuel mixture of oxygen and hydrogen etc.) are discussed.

Subject Areas

shock wave process; shock-wave structure; refraction; domain of existence

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