Combustion

thumb|The August Complex fire in 2020, the largest fire in [[California's history]]

thumb|Wood ash

thumb|The flames caused as a result of a [[fuel undergoing combustion (burning)]] thumb|Regenerative thermal oxidiser|Air pollution abatement equipment provides combustion control for [[industrial processes.]] Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combustion does not always result in fire, because a flame is only visible when substances undergoing combustion vaporize, but when it does, a flame is a ch

energy that must be input to a system to undergo a reaction or process

lowest temperature at which a volatile substance can vaporize to form an ignitable mixture in air

quantity measuring the energy per unit of mass or volume that some substance releases upon oxidation

term encompassing reported cases of the combustion of a human body without an apparent external source of ignition

superseded scientific theory about combustion

thumb |300px |Detonation of TNT, and [[shock wave]]

thumb|upright|An optical pyrometer thumb|upright|A sailor checking the temperature of a ventilation system

any model explaining a chemical reaction

combustion reaction that ignites without external heating

combustible in gas form

burning within within well-defined lower and upper bounds

A backdraft (North American English), backdraught (British English) or smoke explosion is the abrupt burning of superheated gases in a fire caused when oxygen rapidly enters a hot, oxygen-depleted environment; for example, when a window or door to an enclosed space is opened or broken. Backdrafts are typically seen as a blast of smoke and/or flame out of an opening of a building. Backdrafts present a serious threat to firefighters. There is some debate concerning whether backdrafts should be considered a type of flashover.

ratio of one substance's mass to the mass of the total mixture

mass ratio

thumb|upright=1.35|Pyrotechnic deflagrations Deflagration (Lat: de + flagrare, 'to burn down') is subsonic combustion in which a pre-mixed flame propagates through an explosive or a mixture of fuel and oxidizer. Deflagrations in high and low explosives or fuel–oxidizer mixtures may transition to a detonation depending upon confinement and other factors. Most fires found in daily life are diffusion flames. Deflagrations with flame speeds in the range of 1 m/s differ from detonations which propagate supersonically with detonation velocities in the range of km/s.

quotient of thermal diffusivity and diffusion coefficient for a fluid

thumb|Simulation of a flashover event in a controlled environment A flashover is the near-simultaneous ignition of most of the directly exposed combustible material in an enclosed area. When certain organic materials are heated, they undergo thermal decomposition and release flammable gases. Flashover occurs when the majority of the exposed surfaces in a space are heated to their autoignition temperature and emit flammable gases (see also flash point). Flashover normally occurs at between and for ordinary combustibles and an incident heat flux at floor level of .

concept in physics

gas exiting to the atmosphere via a flue

method of rocket engine operation

method of rocket engine operation

temperature that combustion products theoretically can reach if no energy is lost to the outside environment

type of jet engine

Combustion process carried out using pure oxygen instead of air

dimensionless parameter in fluid mechanics

dimensionless parameter in combustion

dimensionless number used in chemical engineering

rocket engine using an electric pump for pressurization

flame where the fuel and oxidizer are mixed before combustion

Software for chemical kinetics, thermodynamics and transport phenomena

related to detonation waves in high explosives

liquid fuel prematurely gasifying

method of rocket engine operation

Concentration of oxygen below which combustion is not possible

PPC also known as GDCI is a combustion process to be used in internal combustion engines. There are certain differences to HCCI engine.

developmental stage of structure fires in a room or other enclosed area