What substance burns in the flame in the inner flame is hotter than the outer flame !! Urgent

If a star like the sun is a flame. Solar surface temperature: about 5500 degrees Celsius; Core temperature: about 20 million degrees Celsius.

Joked, in reality, there are indeed combustion devices with a temperature greater than the outer flame, but they are man-made, not natural flames. Landlords can refer to here.

One of the advantages of this high-efficiency and clean coal combustion technology is that the temperature of the inner flame is higher than that of the outer flame, and the modified combustion is realized.

Pre-mix the flames.

Like the flame of a gas stove is.

When the gas enters the stove, it is mixed with oxygen and then ignited.

At this time, the flame is blue, and the gas mixture will burn as soon as it is released, while the gas must be mixed with oxygen in the air before it can be burned when it is burned directly.

The gas and oxygen of the premixed flame are thoroughly mixed first, and the combustion is more complete, so that a higher temperature can be obtained.

Moving the wire down from the upper part of the flame shows that the wire is brightest in the middle and lower part of the flame, indicating that the maximum temperature of the premixed flame is in the inner flame.

It's the inner flame, and if you do an experiment, you can prove that the alcohol lamp is a match, and after you light the alcohol lamp, the match is slowly passing through the flame, don't light it, pay attention, and you'll notice that the place where the inner flame passes is obviously darkened, so it's an inner flame.

The outside of the candle flame is in full contact with oxygen to complete the chemical reaction, and the heat is naturally more, and the temperature is higher, while the oxygen inside the flame is insufficient. The heating of stars in the universe is another matter, it is caused by thermonuclear reactions (physical changes) inside the stars to release a large amount of heat, and this heat is spread outward, of course, the further outward the cooler it is.

Agree with the third floor - A trip to the afterlife : Any substance has an inner flame that is higher than an outer flame!

When a nuclear reaction occurs with a nuclear substance (if the nuclear reaction counts as combustion).

Hungry. Take a look at the amount of heat produced by the combustion of chemicals.

It must be a mixture of hydrogen and (I forgot the name of the gas) used to cut steel.

The outer flame temperature of the fire is higher than the inner flame temperature. The outer flame is in the most adequate contact with the air, so it can completely react with the gas and burn completely, so the temperature of the outer flame is higher than that of the inner flame. The internal flame is not too hot because it has just started to react and the reaction is very incomplete.

The flame is usually divided into three layers from the outside to the inside:

Outer flame: combustible gas is in contact with air, mixed, and fully combusted, with the highest temperature, but not bright, and light blue.

Internal flame: The part of the combustible gas that is incompletely combusted, accompanied by the formation of carbon particles, is bright and orange-yellow, and the temperature is slightly inferior to the outer flame.

Flame core: the part of the combustible substance that is decomposed, evaporated, melted and vaporized by heat and not burned, the dark area, and the lowest temperature.

Outer flame, if you have seen in any book that the measured value of the inner flame is high, this is the author's mistake, I have also seen and done this kind of question.

Because the outer flame is fully combusted, there is naturally more heat release.

The temperature of the outer flame is high, because the outer flame has more contact with the air (it can be considered as the contact area) and the combustion is sufficient, so the temperature is higher than the temperature of the inner flame.

Of course, the temperature of the outer flame is high, you can do a small test, everything is understood, this is actually common sense!

Generally flames like candles, lighters and the like are external inflammation with high temperatures

Because the outer flame is in the most adequate contact with the air, it can completely react with the gas and burn completely, so the temperature of the outer flame is higher than that of the inner flame.

In general, the average temperature of the outer flame of the alcohol lamp is degrees (in the actual test, the temperature of the outer flame is low because of the contact with the air, the heat is dissipated quickly), the average temperature of the inner flame is degrees, and the average temperature of the flame center is degrees.

The flame is generally divided into three parts.

1. Inner layer. The dark blue flame, due to insufficient oxygen supply, incomplete combustion, very low temperature, has a reducing effect. Called the flame center or reducing the flame.

2. Middle layer. Deep red or light yellow flame, bright. The temperature is higher than the inner layer. Called the Inner Flame.

3. an outer layer. Colorless, due to sufficient oxygen supply, complete combustion, the highest temperature, and oxidation.

The flame is an outer flame with a high temperature.

Flame refers to the visible phenomenon of combustion, usually produced by the reaction of combustibles with oxygen. The flame consists of three parts: the inner flame, the outer flame, and the reaction zone.

The internal flame is the innermost area and is mainly a mixture of gas and vapor. The outer flame is the area around the inner flame, which mainly contains combustion products and incompletely reactive gases. The interface between the inner and outer flames is called the reaction zone.

Application of knowledge points:The temperature distribution of the flame is uneven, and usually the temperature of the outer flame is higher than that of the inner flame. This is due to the fact that in the internal flame, the fuel is mixed with oxygen to a higher degree, the combustion reaction is more complete, and the temperature is relatively low.

In the outer flame, the combustion products are further mixed with oxygen, resulting in a more adequate combustion reaction, which increases the temperature.

Explanation of knowledge points and example questions:For example, I don't have the source to observe the flame of a candle. The inner area of the flame (inner flame) is usually blue in color and relatively cold.

The outer area of the flame (the outer flame) is yellow or orange in color and has a higher temperature. This example clearly illustrates the different temperature distributions inside and outside the flame, with the outer flame being characterized by a higher temperature.

The temperature of the outer flame is higher than that of the inner flame, and the combustibles, oxidants and temperatures are required in the process of object combustion.

The flame is an inner flame with a high degree of temperature rolling. A flame is the visible part of heat and light produced by the combustion of a combustible substance, mainly composed of oxygen, fuel, and heat. A flame is formed when the fuel is sufficiently mixed with oxygen and ignited.

Flames are usually made up of different zones, including fuel vapor, oxidation zone, reduction zone, etc. Inside the flame, the fuel is well mixed with oxygen and burned, releasing a large amount of heat and light energy. The temperature in this area is the highest point of the flame, which is the temperature of the inner flame.

The outer flame area of the flame is the part where the light energy is emitted, and the temperature is relatively low. The outer flame area is usually the part of the flame closest to the surrounding environment, which is cooled and diluted by the empty space, so the temperature is lower.

In conclusion, the inner flame temperature of the flame is usually higher, while the temperature of the outer flame area is lower.