In fluid dynamics, a Mach wave, also known as a weak discontinuity, is a pressure wave traveling with the speed of sound caused by a slight change of...

The Mach number (M or Ma), often only Mach, (/mɑːk/; German: [max]) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity...

exceeds Mach 1. Some other terms: Shock front: The boundary over which the physical conditions undergo an abrupt change because of a shock wave. Contact...

series of isentropic Mach waves. The expansion "fan" is composed of Mach waves that span from the initial Mach angle to the final Mach angle. Flow can expand...

understanding of the physics of shock waves. The ratio of the speed of a flow or object to that of sound is named the Mach number in his honour. As a philosopher...

Shock diamonds (also known as Mach diamonds or thrust diamonds, and less commonly Mach disks) are a formation of standing wave patterns that appear in the...

wave, is a centered expansion process that occurs when a supersonic flow turns around a convex corner. The fan consists of an infinite number of Mach...

speed to the critical Mach number. It is the sudden and dramatic rise of wave drag that leads to the concept of a sound barrier. Wave drag is a component...

Zeldovich–Taylor expansion wave) is the fluid motion of gaseous detonation products behind Chapman–Jouguet detonation wave. The flow was described independently...

speed reaches its critical Mach number the accelerated airflow locally reaches the speed of sound and creates a small shock wave, even though the aircraft...

the speed of sound, often stated as starting at speeds of Mach 5 and above. The precise Mach number at which a craft can be said to be flying at hypersonic...

produce travelling and standing waves, beating, and random motion. Ernst Mach designed and constructed the first pendulum wave demonstration around 1867 at...

The Mach–Zehnder interferometer is a device used to determine the relative phase shift variations between two collimated beams derived by splitting light...

to obtain a relation between deflection angle and Mach number. Each wave in this case is a Mach wave, so it is at an angle α = sin − 1 ⁡ 1 M , {\displaystyle...

Mach reflection is a supersonic fluid dynamics effect, named for Ernst Mach, and is a shock wave reflection pattern involving three shocks. Mach reflection...

itself has an airspeed lower than Mach 1.0. This creates a weak shock wave. As the aircraft exceeds the critical Mach number, its drag coefficient increases...

defined as above Mach 5, or above 5 times the speed of sound. Below Mach 1, weapons would be characterized as subsonic, and above Mach 1, as supersonic...

This is a list of wave topics. Contents:  Top 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z...

supersonic regime above approximately Mach 1.2. The large increase in drag is caused by the formation of a shock wave on the upper surface of the airfoil...

Eventually, they merge into a single shock wave, which travels at the speed of sound, a critical speed known as Mach 1, which is approximately 1,192 km/h (741 mph)...

Sound-chamber targets are the oldest type of electronic targets, and use the Mach wave of the bullet to determine its position as it passes through the target...

increase in drag from about Mach 0.8, and it is the fuel costs of the drag that typically limits the airspeed. Attempts to reduce wave drag can be seen on all...

oblique shock wave. It is always possible to convert an oblique shock into a normal shock by a Galilean transformation. For a given Mach number, M1, and...

critical Mach number is the maximum speed at which air can travel over the wings without losing lift due to flow separation and shock waves, any increase...

unmanned research scramjet experimental aircraft for hypersonic flight at Mach 5 (3,300 mph; 5,300 km/h) and an altitude of 70,000 feet (21,000 m). The...

than either of the parent waves. The formation of a mach stem is one example of constructive interference. Whenever a blast wave reflects off of a surface...

Mach cutoff is a phenomenon of high-altitude supersonic flight in which the sonic boom generated at speeds not too far above Mach 1 never reaches the...

increase across the stern shock wave associated with a return to subsonic flow behind the aircraft. Since the local Mach number is not uniform over the...

quantity called Mach number. This is shown on a Machmeter as a decimal fraction. An aircraft flying at the speed of sound is flying at a Mach number of one...

physics, particularly in discussions of gravitation theories, Mach's principle (or Mach's conjecture) is the name given by Albert Einstein to an imprecise...