Home Tags Posts tagged with "fire"


0 1376

Explain yourself!

Basically in a normal flame you have hot combustion products which are less dense than the surrounding air so buoyancy makes them rapidly move upwards. As this is happening they are cooling down and there isn’t enough time to complete combustion so soot is formed. Blackbody radiation from the soot is the characteristic orange part of the flame that we are used to seeing.

In microgravity there is no buoyancy-induced convection so what you see is a pure diffusion flame. That means that there is a thin interface in a sphere around the vaporized fuel stream where the fuel and oxidizer is perfectly mixed to make combustion take place. the fuel burns nearly completely without being pulled away by buoyancy effects, thus you just see a sphere of perfect blue flame.


0 923

That cat’s not too adept at putting 2 and 2 together is it?
Fire + paw = ouch… “Let me try that again. OK, one more time…”


0 1152

This could save thousands of lives.

When ampoule is thrown at the fires the chemical will disperse over the burning area. At the same time, the extinguishing chemicals would generate ammonium gas. Water evaporation would cool down the temperature of combustibles (cooling effectiveness) while ammonium gas would create a fire retardation effect that restrains the burning chain reaction. At the same time, one of the main ingredients for SAT119 and carbon dioxide produced by heat would suffocate oxygen and restrain combustibles from burning (cutting oxygen).

0 810

Property worth hundreds of thousands of shillings was destroyed when a residential buliding in Kiambu caught fire. There was drama when the Kiambu fire Brigade responded fast only to run out of water. But as Ferdinand Omondi reports, the icing on the cake was when a second fire fighting unit responded, only for its fire engine to catch fire too.

I wish my news was read to me by this man every day!