secondary air

secondary air

[′sek·ən‚der·ē ′er]
(mechanical engineering)
Combustion air introduced over the burner flame to enhance completeness of combustion.

secondary air

1. Air which is introduced into a furnace (in addition to the primary air which enters either as a mixture with fuel or as blast underneath a stoker) above or around the flames to promote combustion.
2. Air already in an air-conditioned space, in contrast to primary air which is introduced into the space.
References in periodicals archive ?
Tenders are invited for Design, manufacture, supply, erection, testing and commissioning of fresh air ventilation unit including centrifugal fan with suitable motor, secondary air grills, inlet filt
Since 2006, our production facility in Ningbo has become home to an entire family of state-of-the-art emissions products, from EGR valves, coolers and modules to ignition coils, secondary air systems and thermostats.
It features a narrow grille, sweptback headlamps equipped with projectors and a hexagonal secondary air damn.
REPLACE THE PRIMARY AND SECONDARY AIR FILTER ELEMENTS WHEN THEY'RE DAMAGED OR TORN, OR IF THE AIR CLEANER INDICATOR STAYS & IN THE RED AFTER A CLEANING.
Instead the secondary air (often the return air) is drawn through the evaporative cooler and then the cooler secondary air cools the primary air through a heat exchanger (HX).
1) The furnace is divided into two regions, one is the dense phase zone below the secondary air port and the other is the dilute phase zone above the secondary air port.
Additionally these bridges and intermediate bridges comply with OEM specifications regarding secondary air supply and feature a patent-pending replaceable notch system with straight custom.
Plant species are susceptible to air pollution to varying degrees and mining generates significant quantities of primary air pollutants -- particulate matter, oxides of nitrogen ( due to use of a large number of vehicles and diesel generator sets) -- and a secondary air pollutant, ozone.
It has been slightly modified compared to the version used in vehicles like the Audi TT; for example, there is a secondary air system added at the cylinder head to assure that the exhaust gas treatment kicks in quickly.
To carry out flow analysis of a gas turbine burning combustion chamber[2] and to propose the best possible design of primary and secondary holes, to achieve optimal primary to secondary air flow ratio at cold flow conditions.
LDevi et al [14] reported that secondary air injection to the gasifier results in a significant tar reduction and also a higher temperature could be attained due to secondary air injection in the gasifier.
A secondary air management system enables the newly designed powerplant to provide approximately 40kg/m of torque during ordinary low-rev driving, which gives an optimum air-fuel ratio for around-town efficiency and helps the Nissan GT-R meet ultra-low emission vehicle (U-LEV) standards.