secondary combustion

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• Secondary air injection — Theory and origins= Secondary air injection (commonly air injection, colloquially smog pump, trademark Air Injection Reactor) is an automobile emissions control strategy introduced in 1966, wherein fresh air is injected into the exhaust stream.… …   Wikipedia

• secondary compression — A term that is used in two stroke engines. Primary compression takes place in the crankcase and is then pushed up into the combustion chamber where secondary compression takes place as the piston squeezes the mixture. If the crankcase seals are… …   Dictionary of automotive terms

• secondary air/airflow — That portion of the compressor output air used to cool engine parts and combustion gases. See also primary air …   Aviation dictionary

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• Staged combustion — is a method for reducing Nitrogen oxides (NOX) emissions from combustion. There are two methods: * Air staged supply * Fuel staged supplyAir staged supplyCharacteristics: * NOX reduction rate from 50 75% is possible. * Spatial separation of… …   Wikipedia

• annular combustion chamber — Annular means pertaining to an annulus or ring. Ring shaped. An annular combustion chamber is in the shape of a ring or a cylinder and the whole of the annulus between the compressor and the turbine is used for combustion. Like other layouts… …   Aviation dictionary

• cannular/can-annular chamber combustion chamber — An arrangement in which flame tubes are laid out within the casing, resulting in weight reduction and an ease of construction advantage. The supply of secondary air to the flame tubes is made through a common air casing while primary air for… …   Aviation dictionary

• environmental works — ▪ civil engineering Introduction       infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …   Universalium

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