Mach waves

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• 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 number — (mathrm{Ma} or M) (generally pronEng|ˈmɑːk, sometimes IPA|/ˈmɑːx/ or IPA|/ˈmæk/) is the speed of an object moving through air, or any fluid substance, divided by the speed of sound as it is in that substance. It is commonly used to represent an… …   Wikipedia

• Mach , Ernst — (1838–1916) Austrian physicist Mach, who was born at Turas (now in the Czech Republic), had a somewhat unorthodox upbringing and education. His father was a man knowledgable in both the classics and the sciences who retired to farm near Vienna… …   Scientists

• Mach, Ernst — born Feb. 18, 1838, Chirlitz Turas, Moravia died Feb. 19, 1916, Haar, Ger. Austrian physicist and philosopher. After earning a doctorate in physics in 1860, he taught at the Universities of Vienna and Graz as well as Charles University in Prague …   Universalium

• Mach — Ernst, Austrian scientist, 1838–1916. See M. band, M. number. * * * machine activity [UMLS]; Mortality Assessment in Congestive Heart Failure [study] * * * Mach mäk n a usu. high speed expressed by a Mach number <an airplane flying at Mach… …   Medical dictionary

• Mach, Ernst — (1838–1916)    A physicist and philosopher, Mach had a profound influence on Austrian science and culture generally. His teaching career at the University of Vienna was relatively brief, beginning in 1895 but severely curtailed by a serious… …   Historical dictionary of Austria

• Mach wave — A wave formed in front of a body when it is moving at the speed of sound. The waves do not move ahead of the body; they bunch up and form a Mach wave. A Mach wave is at right angles to the direction of movement of the body and is called a normal… …   Aviation dictionary

• Mach wavelet — Small shock waves, usually present in large numbers in boundary layers and around the surface of a supersonic body. The bow wave becomes progressively weaker as it gets farther from the aircraft, eventually becoming a very weak Mach wave. Also… …   Aviation dictionary

• Ernst Mach — Infobox Philosopher region = Western Philosophy era = 20th century philosophy color = lightsteelblue image size = 200px image caption = Ernst Mach name = Ernst Mach birth = February 18, 1838 Brno, Austrian Empire death = Death date and… …   Wikipedia

• 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

• Lee waves — In meteorology, lee waves, are atmospheric standing waves. The most common form is mountain waves, which are atmospheric internal gravity waves. These were discovered in 1933 by two German glider pilots, Hans Deutschmann and Wolf Hirth, above the …   Wikipedia