Table of Contents
What reaction affects the explosive propagation reaction through a deflagrating explosive?
The propagation of an explosion reaction through a deflagrating explosive is based on thermal reactions. The explosive material surrounding the ini- tial exploding site is warmed above its decomposition temperature causing it to explode. Explosives such as propellants exhibit this type of explosion mechanism.
What is the difference between low explosives and high explosives?
Explosives fall into two categories – high explosives and low explosives. The main difference between these two categories is the velocity of detonation. High explosives detonate at a rate greater than the speed of sound whereas low explosives deflagrate. Deflagration involves particle to particle burning.
Which definition describes explosive material quizlet?
An explosive is a chemical or mixture of chemicals that react violently and produce an explosion.
Which of the following is combustion which propagates through a gas or across the surface of an explosive at subsonic speeds driven by the transfer of heat?
deflagration
1.1 technical Combustion which propagates through a gas or across the surface of an explosive at subsonic speeds, driven by the transfer of heat. ‘Explosives experts refer to rapid explosive reactions as detonation and slower explosive reactions as deflagration.
What are the two basic types of explosions briefly describe each?
There are two types of chemical explosives: High-Order Explosives and Low-Order Explosives. High-Order Explosives: These explosives cause destructive shock waves, such as dynamite. Low-Order Explosives: These explosives lack the over-pressurization wave which high-order explosives, such as gunpowder, create.
What are the two classes of high explosives What are the differences between the two classes?
Detonating explosives, such as TNT and dynamite, are characterized by extremely rapid decomposition and development of high pressure, whereas deflagrating explosives, such as black and smokeless powders, involve merely fast burning and produce relatively low pressures.
Does hydrogen detonate or Deflagrate?
The hydrogen is one of the most explosive gases and deflagration or even detonation can be easily triggered when it is mixed with air at a high pressure.
What is a deflagration panel?
Deflagration protection systems vent the combustion gases and pressures from withing a building or structure so that structural or mechanical damage is minimised after a deflagration event.
How does deflagration occur?
A deflagration occurs when a flame front propagates by transferring heat and mass to the unburned air–vapor mixture ahead of the front. The combustion wave travels at subsonic speeds to unburned gas immediately ahead of the flame front.
What is subsonic combustion?
Deflagration (Lat: de + flagrare, “to burn down”) is subsonic combustion in which a pre-mixed flame propagates through a mixture of fuel and oxidizer. Deflagrations can only occur in pre-mixed fuels. Most fires found in daily life are diffusion flames.
What is a subsonic explosion?
Subsonic explosions are created by low explosives through a slower combustion process known as deflagration.
Can dynamite explode when wet?
Even though the diatomaceous earth takes away some of the dangers of nitroglycerin, there are still problems because the mixture is not stable in damp environments. Water causes the nitroglycerin to leak away. The nitroglycerin can build up, and explode unexpectedly.
What is a quadric surface?
A quadric surface is the graph of a second-degree equation in three variables x, y, and z. The most general such equation is where A,B,C,…, J are constants, but by translation and rotation it can be brought into one of the two standard forms
How to use traces to sketch the quadric surface with equation?
Use traces to sketch the quadric surface with equation Solution: By substituting z= 0, we find that the trace in the xy-plane is x2+ y2 /9 = 1, which we recognize as an equation of an ellipse. In general, the horizontal trace in the plane z= kis which is an ellipse, provided that k2< 4, that is, –2 < k< 2.
What is the equation of a cylinder with a circular cross section?
If a = b a = b we have a cylinder whose cross section is a circle. We’ll be dealing with those kinds of cylinders more than the general form so the equation of a cylinder with a circular cross section is, x2 +y2 =r2 x 2 + y 2 = r 2 Here is a sketch of typical cylinder with an ellipse cross section.
Which surface is a parabolic cylinder?
The graph is a surface, called a parabolic cylinder, made up of infinitely many shifted copies of the same parabola. Here the rulings of the cylinder are parallel to the y-axis. cont’d The surface z= x2is a parabolic cylinder.