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2. Combustion instability - Wikipedia

   en.wikipedia.org/wiki/Combustion_instability

   Static instability [2] or flame blow-off refer to phenomena involving the interaction between the chemical composition of the fuel-oxidizer mixture and the flow environment of the flame. [13] To explain these phenomena, consider a flame that is stabilized with swirl, as in a gas-turbine combustor , or with a bluff body .

3. Smouldering - Wikipedia

   en.wikipedia.org/wiki/Smouldering

   Smouldering fuels are generally porous, permeable to flow and formed by aggregates (particulates, grains, fibres or of cellular structure). These aggregates facilitate the surface reaction with oxygen by allowing gas flow through the fuel and providing a large surface area per unit volume. They also act as thermal insulation, reducing heat losses.

4. Chimney fire - Wikipedia

   en.wikipedia.org/wiki/Chimney_fire

   Regular chimney sweeping removes creosote and prevents fires in the chimney. Steps to prevent this buildup of deposits include only running appliances hot during the initial ignition phase regularly, only building short and hotter fires, regular cleaning of flues using a chimney sweep, and only using internal chimney structures where possible versus a chimney attached to an external wall.

5. Flammability limit - Wikipedia

   en.wikipedia.org/wiki/Flammability_limit

   Lower flammability limit (LFL): The lowest concentration (percentage) of a gas or a vapor in air capable of producing a flash of fire in the presence of an ignition source (arc, flame, heat). The term is considered by many safety professionals to be the same as the lower explosive level (LEL).

6. Flame supervision device - Wikipedia

   en.wikipedia.org/wiki/Flame_supervision_device

   For gas appliances, a flame supervision device (FSD) – alternative name: flame failure device (FFD) – is a general term for any device designed to stop flammable gas going to the burner of a gas appliance if the flame is extinguished. This is to prevent a dangerous buildup of gas within the appliance, its chimney or the room. [1]

7. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   Heavy metal firebacks are sometimes used to capture and re-radiate heat, to protect the back of the fireplace, and as decoration. Fenders are low metal frames set in front of the fireplace to contain embers, soot and ash. For fireplace tending, tools include pokers, bellows, tongs, shovels, brushes and tool stands. Other wider accessories can ...