Diagnostics of Density Fields in Hypersonic Flows around a Cone in a Light-Gas Gun by the Shadow Photometric Method

Autor:	M. Yu. Chernik, A. I. Makhnach, P. P. Khramtsov, M. V. Doroshko, V. M. Grishchenko, I. A. Shikh, V. A. Vasetskii
Rok vydání:	2019
Předmět:	010302 applied physics Shock wave Physics Hypersonic speed Physics and Astronomy (miscellaneous) business.industry Rocket engine nozzle Inflow 01 natural sciences 010305 fluids & plasmas law.invention symbols.namesake Acceleration Optics Mach number law 0103 physical sciences Shadow Light-gas gun symbols business
Zdroj:	Technical Physics. 64:1424-1429
ISSN:	1090-6525 1063-7842
DOI:	10.1134/s1063784219100104
Popis:	A novel approach to obtaining hypersonic flows is proposed and the results of experimental study of hypersonic flows around cones with semivertex angles τ1 = 3° and τ2 = 12° and inflow Mach numbers M = 18 (τ1 = 3°) and 14.4 (τ2 = 12°) are presented. The use of a light-gas gun where a de Laval nozzle is mounted instead of an acceleration channel allows obtaining a hypersonic flow with a high value of optical density of the outflowing gas sufficient for visualization and diagnostics of the flow by optical methods. The flow pattern is visualized by the shadow method. Shadow images are registered using a high-speed Photron Fastcam camera with an exposure time of 1 μs and frame rate of 300 000 fps. The inflow Mach number is computed using the shadow images based on the angle of shock wave inclination.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bb6727ed69aeb9c4e3640f0b248f628e https://doi.org/10.1134/s1063784219100104 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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