secondary air

secondary air

[′sek·ən‚der·ē ′er]
(mechanical engineering)
Combustion air introduced over the burner flame to enhance completeness of combustion.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
FPTUs mix the primary air processed by central air-handling units with the secondary air recirculated from conditioned spaces or the plenum and then deliver the mixture to the conditioned zones.
The first region of the control volume is the suction region in which the secondary air or air to eject is suctioned toward the ejector's subsequent regions.
For this reason, this research seeks to find out how the combustion quality is influenced by the structural elements of the combustion chamber, such as the thermal insulation layer of the combustion chamber and the position of secondary air intake.
The results were compiled on the basis of temperature at the wall of combustion chamber, temperature at the exhaust, pressure loss during combustion, recirculation of primary air and the cooling effect created by the secondary air to minimize temperature at the walls of combustion chamber.
The automaker is recalling the vehicles because a relay that controls the secondary air injection pump is prone to failure, causing the pump to run continuously.
The thrust of turbofan engine is 80% realizated by the fan that divides the engine airflow into the primary air flow and secondary air flow defined by the bypass ratio.
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.
The Harper Bridge Sleeve Flow-Thru feature allows secondary air to permeate the system to make it easy to mount plate sleeves or ITR plates.
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.
The primary air is introduced from the distributor and the secondary air injected into the furnace from the side walls at three different heights.