Mach cone

Mach cone

[′mäk ‚kōn]
(fluid mechanics)
The cone-shaped shock wave theoretically emanating from an infinitesimally small particle moving at supersonic speed through a fluid medium; it is the locus of the Mach lines.
The cone-shaped shock wave generated by a sharp-pointed body, as at the nose of a high-speed aircraft.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Mach Cone

 

a conical surface that bounds the region in a supersonic flow of gas in which the sound waves (perturbations) emanating from a point source A of the perturbations are concentrated (see Figure 1). In a homogeneous supersonic flow of gas, the angle a between the generatrices of the Mach cone and its axis is called the Mach angle; it is related to the Mach number by the equation sin a = 1/M

Figure 1. Mach cone that arises upon supersonic flow around an object

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

Mach cone

Mach cone
The cone-shaped shock wave produced by a sharp pointed object moving through the atmosphere at a speed greater than Mach 1. The area bounded by the sides of an oblique shock wave forms the Mach cone.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Virtual acoustic waves correspond to the characteristic paths on the Mach cone. To obtain these paths, the above equations and the second relation of Eqs.
1 demonstrates domain of influence which is the intersection of local Mach cone (or ellipse) with time level n.
The data shows that, under the right conditions, the rupture occurs much faster than the shear speed in the plates, producing a shock-wave pattern, something like the Mach cone of a jet fighter breaking the sound barrier.