primary combustion

primary combustion

primary combustion
That immediately surrounding the burning fuel, using only a fraction of total airflow (i.e., primary). The rest of the airflow is used for dilution and cooling.
References in periodicals archive ?
The authors conclude that BCP is a valuable additional air quality indicator that would be particularly useful in evaluating health risks of air pollution dominated by primary combustion emissions.
Once most of the moisture is gone and the wood reaches 540 degrees Fahrenheit, the first stage of combustion, called primary combustion, commences.
In addition, the results indicated that the primary combustion properties could be predicted by means of FTIR spectral data.
In a gasification process, fuel gases are generated in a primary combustion chamber operating in a starved air environment where there is not adequate oxygen to allow complete combustion.
In addition, a movable shroud diverts secondary and tertiary air from the primary combustion zone, further minimizing N[O.
Some applications feature a welded "stopper" layer that provides a superior primary combustion seal.
Daily counts of ST-segment depression were consistently associated with primary combustion markers and 2-day average quasi-ultrafine particles < 0.
The approach to combustor design was to have a flame chamber region in the combustor for primary combustion at a close-to-stoichiometric ratio.
Development of a new, self-cooling laser nozzle (device that feeds chemical reactants into lasing cavity) that allows the laser to extract 30 percent more output power from a given amount of laser reactants; -- Development and demonstration of a faster, more reliable way to fabricate the nozzles into rings that form the SBL-IFX laser's primary combustion chamber, known as the gain generator; and -- Development of the manufacturing processes required to produce and coat uncooled, single-crystal silicon optics used for the mirrors in the SBL-IFX lasing cavity.
The fuel-rich gases exiting the primary combustion zone are accelerated through a nozzle and directed at a collector plate that is perpendicular to the flow.
The primary combustion air enters the combustor through a set of swirl blades, which provides stabilization for the primary flame.
The primary combustion chamber is a refractorylined cylindrical steel rotary kiln, normally 4 to 15 feet in diameter and 8 to 60 feet in length.