# Mach number

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Related to Mach number: Drag divergence Mach number

## Mach number

also mach number  (mäk)
n. Abbr. M
The ratio of the speed of an object to the speed of sound in the surrounding medium. For example, an aircraft moving twice as fast as the speed of sound is said to be traveling at Mach 2.

[After Ernst Mach.]

## Mach number

n
(Units) (often not capital) the ratio of the speed of a body in a particular medium to the speed of sound in that medium. Mach number 1 corresponds to the speed of sound. Often shortened to: Mach
[C19: named after Ernst Mach]

## or Mach

(mɑk)

n.
a number indicating the ratio of the speed of an object to the speed of sound in the medium through which the object is moving. Abbr.: M
[after E. Mach]

## Mach

(mɑk, mɑx)

n.
Ernst, 1838–1916, Austrian physicist.

1. machine.
2. machinery.
3. machinist.

## Mach number

(mäk)
The ratio of the speed of a body to the speed of sound in a particular medium. For example, an aircraft flying through air at twice the speed of sound has a Mach number of 2.

## mach number

The ratio of the velocity of a body to that of sound in the surrounding medium.

## mach number

A unit of velocity. Mach 1 is the speed of sound; Mach 5 is described as hypersonic.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 Mach number - the ratio of the speed of a moving body to the speed of soundratio - the relative magnitudes of two quantities (usually expressed as a quotient)
Translations
Machovo číslo
References in periodicals archive ?
Vertical spacing between the airfoils, airfoil angle of attack, Mach number (including transonic and compressible cases), and airfoil thickness were varied.
For each nozzle, we examined the characteristics of the hot jet, including the spatial and temporal distributions of velocity, vorticity, Mach number, pressure, temperature, and shock structures.
We achieved our objective to fly at the design Mach number, at a reasonable altitude and check everything was fine.
Aviation Partners, known worldwide for its Blended and Split Scimitar Winglets TM, on Business Jets and Commercial Aircraft used highly sophisticated computational fluid dynamics (CFD) methods to redesign the P51's wing surface airfoils and to reduce and eliminate the strong shock waves created at Mach number 0.
The static pressure rise is achieved through the ramming effect of the air; the increase in Mach number results in increase in static pressure and static temperature with the loss of stagnation pressure due to the presence of shock waves.
With the ELD-X, Hornady designers used Doppler radar measurements every 2 to 3 feet to generate precise drag coefficient (Cd) versus Mach number plots.
The constraints are a rate of climb greater than or equal to 2,500 ft/min, a cruise Mach number greater than or equal to 0.
The only gotcha is that there might be a small note about initial speeds on the procedure that might say something like "Descend via Mach number until intercepting 280 knots.
To distinguish between compressible and incompressible flow in gases, the Mach number (the ratio of the speed of the flow to the speed of sound) must be greater than about 0.
In recognition of his work, the Mach number (the ratio between the speed of an object and the speed of sound) is named in his honor.
5[degrees] back swept angles, and adopts CFX (a general purpose Computational Fluid Dynamics software) to simulate every impeller, compares and analyzes the results of flow field on different back swept angles through considering pressure ratio, isentropic efficiency, volume flow rate and Mach number.

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