- free-stream Mach number
- 自由气流马赫数
Atmospheric Sciences (English-Chinese) dictionary. 2014.
free-stream Mach number
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free-stream Mach number — The Mach number of a body measured in free stream, which is unaccelerated by the airfoil or the body’s presence … Aviation dictionary
local Mach number — The ratio of the free stream flow to the local speed of sound. The speed of sound varies because of temperature changes around the aircraft, and thus the local Mach number may be more, less, or equal to the free stream Mach number. See free… … Aviation dictionary
critical drag rise Mach number — The free stream Mach number at which because of shock wave, the coefficient of drag for a given angle of attack increases rapidly. This increase in drag value should be at least 0.005. Also called a compressibility drag rise Mach number … Aviation dictionary
detachment Mach number — The free stream Mach number above which there is only a small movement of the bow shock wave with an increase in speed. It indicates the upper limit of a transonic region … Aviation dictionary
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shock drag — An increase in drag associated with the formation of shock waves over a body as it approaches the speed of sound. Note the increase in the drag once critical mach number (MCRIT ) is reached. The x axis represents free stream Mach number (MFS ) … Aviation dictionary
center-of-pressure travel — i. The linear distance the center of pressure travels along a chord over the entire range of angles of attack, ignoring the effects of compressibility and subsonic flow. The center of pressure moves forward as the angle of attack increases until… … Aviation dictionary
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