brannforløpet

Brannforløpet refers to the sequence of events and the development of a fire from its ignition to its extinguishment or uncontrolled spread. It encompasses various stages, starting with ignition, where a heat source comes into contact with a combustible material, and a chemical chain reaction begins. This is followed by the growth stage, where the fire begins to spread and intensify as more fuel is consumed and heat is released. Key factors influencing growth include fuel type, oxygen availability, and ventilation.

During the fully developed stage, the fire reaches its maximum intensity and extent, consuming available fuel rapidly. Heat release rates are at their peak, and temperatures can become extremely high. This stage is characterized by significant smoke production and potential for flashover, a rapid transition to a state where all combustible surfaces in a compartment ignite simultaneously.

Following the fully developed stage, the fire enters the decay stage. During this phase, the fire intensity decreases as the supply of fuel diminishes. Temperatures begin to drop, and smoke production may lessen or change in character. The fire may smolder or produce intermittent flames. Finally, the fire is either extinguished through suppression efforts or naturally dies out due to lack of fuel or oxygen. Understanding the brannforløpet is crucial for fire investigation, fire safety engineering, and effective firefighting strategies.