Which of the following flame has higher temperature?

Which of the following flame has higher temperature?

The closest will be the hottest part of a flame, where the combustion reaction is most efficient. This also assumes complete combustion (e.g. perfectly balanced, non-smokey, usually bluish flame).

What determines flame temperature?

Flames can vary in temperature from about 600°C to more than 3000°C. One factor is the energy released from the fuel’s combustion. Acetylene, for example, burns very hot because of the triple bond between the carbon atoms in it.

How does pressure affect combustion?

The combined effects of pressure and oxygen concentration on the burning rate, combustion flow field, and ignition were evaluated. Results showed that at low pressure, the burning rate was less intense with a decrease in the mass loss rate. However, the reduction in pressure caused a shortened ignition delay time.

How does air temperature affect combustion?

High air temperature accelerates the rate of combustion and results in a high flue gas temperature. This increase in flue gas temperature has two effects. Therefore, a higher air temperature created more fuel-rich conditions and increased the flame temperature in the fuel-rich zone, both reducing fuel NO formation.

Which part of the flame is the hottest?

base
The hottest part of the flame is the base, so this typically burns with a different colour to the outer edges or the rest of the flame body. Blue flames are the hottest, followed by white. After that, yellow, orange and red are the common colours you’ll see in most fires.

How does pressure affect adiabatic flame temperature?

However, at high pressure (8 and 10 bar), the adiabatic flame temperature is dominated by the pressure and it decreases with pressure in spite of increasing the inlet velocity, this is might be due to the fact that the high pressure inside the combustion chamber creates a back pressure that apposes the flow of the …

How does temperature affect combustion?

What burns hotter than fire?

While lava can be as hot as 2200 F, some flames can be much hotter, such as 3600 F or more, while a candle flame can be as low as 1800 F. Lava is hotter than a typical wood or coal-buring fire, but some flames, such as that of an acetylene torch, is hotter than lava.

Does pressure affect burning?

Why is combustion more efficient at high pressure?

(By comparison, normal atmospheric pressure that we experience at sea level is only 1 atm.) Combustion under high pressures is thermodynamically more efficient; that is, more of the heat energy produced by the combustion reaction is converted to desired mechanical energy.

What is the pressure at the end of combustion?

At the end of combustion, the combustion products not only have a very high temperature, frequently in excess of 2,000 kelvin, but the chamber pressure is also several times that of the starting pressure, which is already quite high.

How is pressure related to combustion in a bomb?

After igniting a fuel mixture inside such a combustion chamber, researchers would take measurements of the pressure increase caused by the burning of the fuel. “From that,” Law explains, “you would speculate what has happened inside the bomb based on some assumed combustion processes.”

How is air pressure related to fire burning?

Wieser et al. [8] conducted small scale European standard fire experiment at altitudes from 400 to 3000 m. Their results show that the fire burning rate is proportional to th power of atmosphere pressure where 1.3.

https://www.youtube.com/watch?v=gTdkBMCTcYc