What is condensed phase explosion?
What is condensed phase explosion?
An explosion that occurs when the material is present in the form of a liquid or solid.
What causes deflagration to detonation?
Detonation can be initiated either by use of a high explosive charge or from a deflagration wave that accelerates due to congestion and confinement. Certain chemicals are more prone to create detonations than normal hydrocarbons. These include ethylene, acetylene, and hydrogen.
What is detonation in explosive?
Discovered in 1881 by French scientists, detonation is the result of a supersonic wave initiating a secondary explosion. Explosion, on the other hand, is a general term for an accelerated release of energy generating extreme temperatures, releasing of gases and expanding volume.
Does propane detonate or Deflagrate?
Detonation occurred in the propane–air cloud bounded on one side by a rigid vertical wall, and no detonation was observed in the cloud with similar injection of hot products without a rigid wall.
What is difference between deflagration and detonation?
In its most benign form, a deflagration may simply be a flash fire. In contrast, a detonation is characterized by supersonic flame propagation velocities, perhaps up to 2,000 metres per second (4,500 mph), and substantial overpressures, up to 2 megapascals (290 psi).
What is difference between detonation and knocking?
Knocking vs Detonation Knocking is the making sharp sounds due to uneven combustion of fuel in the cylinder of a vehicle engine. Detonation is the process of pre-ignition or auto-ignition of a fuel in an engine’s combustion chamber.
Can a propane tank explode from impact?
Propane tanks do not explode. They do not implode and nor do they rupture or come apart on their own. In fact, bringing a propane tank to the point of “explosion” is a tremendously difficult and time consuming task that’s not as simple as most people think.
Can lightning explode a propane tank?
The tank will slowly vent propane, if absolutely necessary, but it will not explode.
Why is detonation more efficient than deflagration?
Detonation combustion burns a given unit of fuel tens of thousands of times faster than deflagration. This creates pressure spikes with 10 to 1 fluctuations. Deflagration, by contrast, produces a smooth flow field into the turbine with a fraction of a percent variation in pressure and mass flow rate.
What are extremely insensitive explosives?
(5) Division 1.51 consists of very insensitive explosives. This division is comprised of substances which have a mass explosion hazard but are so insensitive that there is very little probability of initiation or of transition from burning to detonation under normal conditions of transport.
What is detdetonation and how does it happen?
Detonation is generally the result of any number of combinations of factors. First, let’s get into what happens when detonation occurs and then we can get into why it happens and then the difference between detonation and pre-ignition. They are completely different but the end result can still be a wrecked engine.
What is the difference between pre-ignition and detonation?
The net result is detonation. Pre-ignition is a completely different set of circumstances. You might be able to figure out the cause of this by its label. As we all know, the combustion process doesn’t start until the spark jumps across the electrode gap.
Is detonation bad for a piston?
That image should be enough to impress upon you that audible (there are also instances of inaudible, or trace detonation that you won’t hear) detonation is bad. Generally, forged pistons can withstand short periods of detonation as can some cast pistons.
Why do overheated engines detonate?
If you’ve ever wondered why an engine that is overheating will start detonating, that’s because the inlet air temperature is much greater in the combustion chamber because the cooling system has turned to steam and also because the overheated engine is heating the air going into the combustion chamber. The net result is detonation.
