Aviation dictionary. 2014.
critical Mach number — i. The local Mach number at which airflow at any part of the wing attains a velocity equal to the local speed of sound. ii. The Mach number at which compressibility effects significantly influence the handling characteristics of an aircraft. This … Aviation dictionary
Mach number — The ratio of the velocity of a body to that of sound in a surrounding medium. A Mach number of 0.8 or 1.2 means that the aircraft is flying at 0.8 or 1.2 times, respectively, the local speed of sound at that ambient temperature. Also known as a… … Aviation dictionary
Critical Mach number — Transonic flow patterns on an aircraft wing showing the effects at critical mach. In aerodynamics, the critical Mach number (Mcr) of an aircraft is the lowest Mach number at which the airflow over any part of the aircraft reaches the speed of… … Wikipedia
Mach wave — In fluid dynamics, a Mach wave is a pressure wave traveling with the speed of sound caused by a slight change of pressure added to a compressible flow. These weak waves can combine in supersonic flow to become a shock wave if sufficient Mach… … Wikipedia
Mach (kernel) — Mach is an operating system microkernel developed at Carnegie Mellon University to support operating system research, primarily distributed and parallel computation. It is one of the earliest examples of a microkernel, and still the standard by… … Wikipedia
Mach principle — In theoretical physics, particularly in discussions of , a Mach principle is any of a class of principles which are more specific statements of Mach s principle.The broad notion is that mass there influences inertia here . Any statement which… … Wikipedia
Cauchy number — The Cauchy number, mathrm{Ca} is a dimensionless number in fluid dynamics used in the study of compressible flows. It is named after the French mathematician Augustin Louis Cauchy.When the compressibility is important the elastic forces must be… … Wikipedia
Nusselt number — In heat transfer at a boundary (surface) within a fluid, the Nusselt number is the ratio of convective to conductive heat transfer across (normal to) the boundary. Named after Wilhelm Nusselt, it is a dimensionless number. The conductive… … Wikipedia
Keulegan–Carpenter number — The Keulegan–Carpenter number is important for the computation of the wave forces on offshore platforms. In fluid dynamics, the Keulegan–Carpenter number, also called the period number, is a dimensionless quantity describing the relative… … Wikipedia
Centrifugal compressor — Centrifugal compressors, sometimes termed radial compressors, are a sub class of dynamic axisymmetric work absorbing turbomachinery.[1] Centrifugal impeller with a highly polished surface likely to improve performance … Wikipedia
