What is the reason why the candle burns and crackles

There may be moisture in the candle, and after the burning is heated, the moisture evaporates quickly, and the resulting steam makes a sound.

The candle burns and crackles because the candle has moisture.

Here the fire is not extinguished mainly in (utilization.

Source air convection heat dissipation method) can the convection heat dissipation force make the temperature of the combustion point lower than the ignition point value! Whether or not the carbon dioxide exhaled by humans can extinguish the fire is not an issue. Anything burns to reach the ignition point.

As soon as the candle blows, the temperature is below the ignition point, so it goes out.

In general, the wind of the fan fire is not strong enough to keep it below the ignition point, and the wind brings more oxygen to it, so the more it fans, the more it is hot. People exhale carbon dioxide, and fans fan air. Carbon dioxide does not support combustion, so the candle is extinguished; The air contains combustion-supporting oxygen, and the faster the air flows, the more oxygen the flame comes into contact with, so the more the fan is stronger.

The contact area between the candle and the air is too small, if you blow on it, in a short period of time, the candle is hypoxic, so it will be extinguished as soon as you blow The contact area between the candle and the air is too small, if you blow on it, in a short period of time, the candle is hypoxic, so it will be extinguished as soon as you blow it.

The main thing is also copying.

The fire is lit by a problem, and the wind blows the candles, taking away the large amount of heat and lowering the temperature.

du, so that the candle can not be ignited, so it is extinguished, and the wood has a much higher ignition point than the candle, and the wood has more combustibles than the candle, and the wind blows and also brings oxygen, from the perspective of the three elements of the object burning, even if the wind blows the wood, it burns more vigorously.

To put it bluntly, it is the sound of fibers burning in a fire.

When the candle burns, the wick of the candle will continuously transport the alkanes in the paraffin wax to the place with high oxygen content at the core to burn, the core is made of chemical fibers, and carbon is also generated, when the air flow blows the flame, there is also a momentary intermittent alkane heat, at this time you seem to have a small flame, in fact, the flame did not burn to the alkanes below, forming a hot and cold collision scene (that is, the flame is still there, and the bottom is blown cold). Then there was the flame burning downwards and the crackling of the cold fibers at a distance of a few microns.

Matches are simpler, the principle of burning wood to produce carbon, and the wood carbonized at high temperature will make a sound of forced deformation of wood fibers.

That's when you blow the air can touch the core of the fire, causing the combustion to be impure, and there is a sound.