Blue flames are those that are not bright. These flames have access to as much oxygen as they can utilize, allowing them to burn exceedingly effectively. Because all of the carbon that is utilized can be converted into CO2, there is no soot. Blue flames are used when you want a fast burn but you don't want smoke.
Non-luminous flames look like blue flames but they are actually invisible to the naked eye. An example would be flames from an open gas burner. Gas never emits light; it only gives off heat and light particles called "ions". When these ions collide with something they become excited and give off energy as radiation. When this radiation hits something it can cause things to glow red or orange, just like a luminous flame. But since gas doesn't emit light itself, it needs something else to do so. This is where the name "non-luminous" comes in. There are two types of non-luminous flames: electric and magnetic.
Electric flames are created by an arc between two wires with different voltages. The energy released during an arc has many forms, but mostly it's heat. So if you connect one wire to a battery and another wire to a lamp socket, an arc will form between the two wires and the lamp will come on because electricity is flowing through it.
Either the flame can or cannot obtain enough oxygen, hence it is either non-bright or luminous.
The blue color of the flame is due to nitrogen molecules present in the air diffusing into the surface of the burning material. The deeper the penetration, the more intense the blue color.
Nitrogen is the second most abundant element in the atmosphere (after oxygen), so you would expect there to be some in the fire. The fact that we see blue flames only when there is an abundance of atmospheric nitrogen suggests that its presence in the fire inhibits the formation of new red flamesin.
Have a look at your fireplace or burner and you'll see that sometimes there are blue flames and sometimes there are white ones. This depends on how much oxygen is available to the fire. If there is less than about 15 percent oxygen, then the fire will be blue flame. As soon as more than this amount becomes available, then white flames will appear.
So yes, blue flames are luminous.
Non-Luminous Flame Characteristics The hue of the non-luminous flame is light blue. Non-luminous flames do not create soot (they do not produce soot). The flames are constant. Non-luminous flames are extremely hot and generate a lot of heat. A fire started with only non-luminous fuel will not burn for very long.
Non-luminous flames are used in signal fires to send information about the fire, such as its location or whether there's danger nearby. They're also used by firefighters to identify hot spots within the forest floor that may contain hot coals from recently burned trees or bushes. Non-luminous flames are called "bullseye" or "target" burns because they make an obvious spot on the ground where no green leaf can grow. These burns can be seen for many miles in the clear air of the forest.
Non-luminous flames are useful for keeping track of your position while hiking or camping in an unfamiliar area. You can use natural landmarks or keep an eye out for smoke from surrounding areas to guide you back to safety if you get lost.
Non-luminous flames are also used by firefighters to identify hotspots within the forest floor that may contain hot coals from recently burned trees or bushes.
Luminous flames do not create as much energy as non-luminous flames because they do not burn as effectively. This indicates that non-luminous flames have far more energy than luminous flames, and their flames are really hotter. Hotter flames burn blue, whereas cooler ones burn yellow. Blue and green colors indicate a mixture of luminous and non-luminous flames.
Heavier elements produced by nuclear fusion in the cores of stars are released to space when a star dies. The energy from these dying stars is what drives away all the gases around them and makes planets possible. As well as releasing energy, burning fuels like gasoline and oil also release carbon dioxide into the atmosphere. Too much of this gas leads to global warming.
Carbon dioxide is one of the main greenhouse gases. Greenhouse gases block out some of the sun's heat and can lead to global warming. There are other gases that play a role in blocking out sunlight but carbon dioxide is by far the most abundant. It makes up nearly 40% of the greenhouse effect!
The three main ways people try to reduce carbon dioxide emissions are by switching off lights, using energy-efficient appliances and buying carbon offsets. Carbon offsets are projects that reduce CO2 emissions elsewhere in the world. For example, one project could be to plant trees that will grow for hundreds of years and remove CO2 from the atmosphere.