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Oblique shock

About: Oblique shock is a research topic. Over the lifetime, 6551 publications have been published within this topic receiving 119823 citations.


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Journal ArticleDOI
TL;DR: In this article, the authors reviewed experimental and numerical results to highlight the flow phenomena and main physical mechanisms associated with this geometry, including time-accurate shock and vortex locations, flowfield evolution and structure, wall-shock Mach number, two- vs. three-dimensional sudden expansions, and the effect of viscous dissipation on planar shock-front expansions.

44 citations

Journal ArticleDOI
TL;DR: An experimental study on the influence of a plasma on the structure of an attached conical shock front appearing at the front end of a missile-shaped model has been carried out in a Mach-2.5 flow as mentioned in this paper.
Abstract: An experimental study on the influence of a plasma on the structure of an attached conical shock front appearing at the front end of a missile-shaped model has been carried out in a Mach-2.5 flow. The tip and the body of the model are designed as the cathode and anode for gaseous discharge, which produces a spraylike plasma moving around the tip. It is observed that the plasma has caused the shock front to separate from the model. The shock wave moves upstream in the form of a detached bow shock a sensible distance away from the model tip. The detached shock front appears to be highly dispersed in its new location as seen in the shadow video graphs of the flow. As the discharge current increases, experimental evidence shown in the video further reveals a distinct state of the flow without the presence of any shock wave.

44 citations

Journal ArticleDOI
TL;DR: In this article, the influence of steady energy addition into the flow by a lowvoltage DC-arc discharge located upstream of conically nosed and spherically blunted bodies was investigated experimentally in the Ludwieg-Tube Facility at Mach 5.
Abstract: The influence of steady energy addition into the flow by a low-voltage DC-arc discharge located upstream of conically nosed and spherically blunted bodies was investigated experimentally in the Ludwieg-Tube Facility at Mach 5. The results include drag force measurements and shadowgraph flow visualizations. The flow-field structure, arising due to the bow-shock/heated-wake interaction, as well as the bow-shock intensity and heating power effects on the drag reduction is analyzed in this paper. The results demonstrate the existence of an optimum heating rate, providing a maximum effectiveness of energy addition and showing distinct drag reductions up to 70% dependent on test conditions and model geometries.

44 citations

Patent
21 Dec 1989
TL;DR: In this paper, a light-pulse-transmiting light guide and a converter are arranged at the distal light guide end and the ionization surface is obliquely sloped with respect to the beaming axis of the impinging light pulse.
Abstract: A shock wave generator for the fragmentation of concrements, having a light-pulse-transmiting light guide and a converter arranged at the distal light guide end and having an ionization surface which, when a light pulse impinges, initiates a shock wave in the surrounding fluid, as well as having a shock wave outlet zone. In order to increase its efficiency and durability, the generator is constructed such that the ionization surface extends obliquely sloped with respect to the beaming axis of the impinging light pulse and the shock wave outlet zone is arranged in the direct shock wave beaming area of the ionization surface, thereby permitting a largely unhindered, low-loss propagation for the shock wave to the application point.

44 citations

Journal ArticleDOI
TL;DR: In this article, the authors derived an equation for the structure of a two-dimensional non-Hugoniot shock in the case of weak shocks with Mach numbers close to one, based on the assumption that the vertical velocity is of order (M1* − 1)3/2 and that the flow within the shock is irrotational.
Abstract: As the curvature of shock waves increases, the shock structure becomes two dimensional, and the usual Hugoniot jump conditions no longer hold. An equation has been derived for the structure of such a two‐dimensional non‐Hugoniot shock in the case of weak shocks with Mach numbers close to one. The development of this equation from the Navier‐Stokes equations is based on the assumptions that the vertical velocity is of order (M1* − 1)3/2 and that the flow within the shock is irrotational. From the derivation it appears that the non‐Hugoniot region behaves as an acoustic wave driven by higher‐order viscous effects. The properties of the above equation, which has been called the viscous‐transonic or V‐T equation have been investigated. The V‐T equation appears to be a combination of Burgers' equation for weak normal shock structure and the transonic equation. It is shown that the structure of oblique shocks is a similarity solution of the V‐T equation. Proper formulation of boundary conditions is considered a...

44 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202369
2022142
2021106
202090
201992
2018102