What is shock tube method?

What is shock tube method?

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. The shock wave is used to produce a rapid increase in the pressure and the temperature of a reactive mixture.

What are the application of shock tube?

SHOCK TUBE Shock tubes are used to investigate compressible flow phenomenon and gas phase combustion reactions. More recently shock tubes have been used in bio medical research to study how biological specimens are affected by blast waves.

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.

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 is the contact surface in a shock tube?

The moving boundary between the shock-processed fluid and the expanded fluid is called a contact surface. The conditions across the contact surface are constant pressure and constant velocity. The incident shock wave travels all the way along the test section until it reflects off of the end wall.

What is a shock tube wind tunnel?

Shock Tunnel: It consists of two major parts, the shock tube and the wind tunnel portion. The shock tube works on the principle of using a high-pressure gas in the driver tube to set up a shock wave, which propagates into the low pressure gas in the driven tube at the instant of diaphragm rupture.

What do all types of shock have in common?

While the general signs for all types of shock are low blood pressure, decreased urine output, and confusion, these may not always be present. Specific subtypes of shock may have additional symptoms.

How fast is 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.

Who invented Reddy shock tube?

Subsequently, in the early 1990s, KPJ Reddy [Professor, Department of Aerospace Engineering] built India’s first free-piston driven hypersonic shock tunnel which can operate at very high enthalpy.

How does a shock tube detonator work?

A shock tube detonator is a non-electric explosive fuze or initiator in the form of small-diameter hollow plastic tubing used to transport an initiating signal to an explosive by means of a shock wave (also known as a percussive wave) traveling the length of the tube.

What are the applications of a shock tube?

Lecture 11: Shock Tube Techniques/Applications Motivation: Shock tubes with lasers is a chemical kinetics research frontier! 1. Introduction to Shock Tubes 2. Vibrational Relaxation 3. Ignition Studies 4. Advances in Shock Tube Modeling 2 1. Introduction to Shock Tubes Basic concept:

What is the equation for the shock of a shock tube?

Equation (2), known as the Shock Tube Equation, gives the incident shock strength p 2 /p 1 as an implicit function of the diaphragm pressure ratio p 4 /p 1 for known gas types.

How are shock waves studied in a reactor?

Modern kinetic shock tubes are “wall-less” high-temperature reactors in which after passage of the shock wave within the time <10−6 s the gas jumpwise increases the pressure and temperature and remains at unchanged values of pressure and temperature for 10 −2 ÷10 −1 s. An elementary reaction is studied in the shock wave.

Why are shock tubes with lasers a research frontier?

Motivation: Shock tubes with lasers is a chemical kinetics research frontier! 1. Introduction to Shock Tubes 2. Vibrational Relaxation 3. Ignition Studies 4. Advances in Shock Tube Modeling 2 1. Introduction to Shock Tubes Basic concept: High-pressure driver gas expands upon diaphragm opening, creating shock wave

Back To Top