What is shock tube experiment?

Shock tubes are ideal devices for studying combustion and chemical kinetics at high temperature and pressure. A shock tube generates a shock wave using a section of high-pressure gas (referred to as driver section, usually filled with helium) and a section of low-pressure gas (driven section) separated by a diaphragm.

How does a reflected shock tunnel work?

In a shock tube,32,33 the sudden expansion of a gas at high pressure into a gas at low pressure produces a plane shock wave that then propagates through a long closed tube. In most shock tubes, the shock wave is reflected at the end of the tube and produces during its way back a second rise in temperature. …

When the diaphragm in a shock tube is ruptured a normal shock is produced which moves towards?

The shock front generated on rupture of the diaphragm travels at supersonic speed (several Mach) toward the reactant gas zone, compressing this and heating it to very high temperatures (which can be calculated), in much less than 1 msec.

What are the different types of shock tubes?

SHOCK TUBES

(1) Shock tubes with an inert gas in the high-pressure chamber.
(2) Shock tubes with an explosive in the high-pressure chamber.
(3) Electrically driven shock tubes.
(4) Shock tubes with shock wave enhancement.

How are shock waves formed?

Shock waves are formed when a pressure front moves at supersonic speeds and pushes on the surrounding air. Shock waves are not conventional sound waves; a shock wave takes the form of a very sharp change in the gas properties. Shock waves in air are heard as a loud “crack” or “snap” noise.

What are the application of shock waves?

Shock waves subsequently have been used in orthopaedics and traumatology to treat various insertional tendinopathies (enthesiopathies) and delayed unions and nonunions of fracture. Shock wave application also has been used in the treatment of tendinopathies in veterinary conditions (race horses).

What is inside a shock tube?

A simple shock tube is a tube, rectangular or circular in cross-section, usually constructed of metal, in which a gas at low pressure and a gas at high pressure are separated using some form of diaphragm. The high pressure gas is known as the driver gas.

What explosive is in shock tube?

The most common product is 3 mm outer diameter and 1 mm inner diameter, with a tiny dusting of HMX/aluminum explosive powder on the tubing’s inner surface, which detonates down the tube at a speed greater than 6500 feet per second but does not burst the tube.

Is shock tube an explosive?

Shock tube contains highly explosive material. However, it may be stored as a low explosive when not attached to a detonator.

What happens across a shock wave?

Across a shock wave, the static pressure, temperature, and gas density increases almost instantaneously. The Mach number and speed of the flow also decrease across a shock wave. If the shock wave is perpendicular to the flow direction it is called a normal shock.

What is another name for shock waves?

What is another word for shock waves?