1. Visualization of supersonic flows with bow shock using transversal discharges
- Author
-
A. V. Danilov, A. E. Ieshkin, Irina A. Znamenskaya, V. S. Chernysh, and Igor E. Ivanov
- Subjects
Physics ,Astrophysics::High Energy Astrophysical Phenomena ,Nozzle ,020207 software engineering ,02 engineering and technology ,Conical surface ,Plasma ,Mechanics ,Condensed Matter Physics ,01 natural sciences ,010305 fluids & plasmas ,Physics::Fluid Dynamics ,symbols.namesake ,Mach number ,Flow (mathematics) ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,symbols ,Supersonic speed ,Bow shock (aerodynamics) ,Electrical and Electronic Engineering ,Transonic ,Astrophysics::Galaxy Astrophysics - Abstract
Transonic and supersonic flows near the cones were visualized with two types of discharges. Pulse volume discharge with pre-ionization by plasma sheets was used to visualize the flow with discontinuities with time resolution in nanosecond range. Bow shock angle was measured by the glow images, and flow Mach number calculated. Stationary discharge was used to record a non-changing weakly luminous micro-nozzle jet flow spreading into a high vacuum region and interacting with a conical metal skimmer, which is essential for gas cluster equipment. A fusiform Mach barrel at the nozzle exit and the bow shock at the obstacle are visualized. The computational flow dynamics model based on Navier–Stokes–Fourier equations was verified by comparison with the experimental images and showed a good agreement with the observed flow structure.
- Published
- 2019
- Full Text
- View/download PDF