Matches in SemOpenAlex for { <https://semopenalex.org/work/W3204186792> ?p ?o ?g. }
- W3204186792 endingPage "122020" @default.
- W3204186792 startingPage "122020" @default.
- W3204186792 abstract "Fuel-rich/lean combustion is considered as a novel combustion technology due to its enhanced ignition performance and low NOx emissions. To further improve the poor performance of large-proportion semicoke and bituminous coal blended combustion and reduce NOx emissions, under a bias concentration ratio (BCR) of 2:1, an addition of bluff bodies at the fuel-rich side is proposed to numerically and experimentally investigate the turbulence-chemistry interaction behaviours of the fuel-rich/lean combustion regime in a 0.3 kW pilot-scale bias combustion furnace for various bluff body blockage ratios (BR = 0%, 11% and 21%). The results show that, increasing the blockage ratio evidently shortens the ignition delay time and burnout time of bituminous coal and semicoke, and the promotive effect of triangular bluff-body (BR = 21%) is greater. The turbulent Damköhler number Dat maximums decrease from 194 to 113 with increasing BR, denoting the regime is traditional combustion mode controlled by mixing. On the fuel-rich side, a local homogeneous MILD combustion zone (Dat <10) extends with increasing BR. For the heterogeneous combustion, the char-O2 reaction determined by diffusion/kinetics and the char gasification reaction controlled by kinetics both show a kinetically controlled trend with increasing BR. Moreover, with increasing BR, a decreasing in the NO concentration in the main reaction zone can be attributed to an enhanced recirculation rate Kv. There is a strong correlation between the maximum NO and the local homogeneous/heterogeneous Damkhöler number on the fuel-rich/lean side in the plane of maximum Kv. Increasing BR can evidently decrease the maximum NO concentration on the fuel-rich side due to the enhanced local MILD combustion regime, and thus reducing NOx exit emissions. Considering temperature, ignition, burnout, turbulence-chemistry interactions and NOx emissions, a triangular-shaped bluff body on the fuel-rich side (BR = 21%) is recommended rather than a cubic bluff body in the fuel-rich/lean co-combustion of semicoke." @default.
- W3204186792 created "2021-10-11" @default.
- W3204186792 creator A5012861613 @default.
- W3204186792 creator A5033284442 @default.
- W3204186792 creator A5043682664 @default.
- W3204186792 creator A5045396303 @default.
- W3204186792 creator A5058450763 @default.
- W3204186792 creator A5087618413 @default.
- W3204186792 date "2022-01-01" @default.
- W3204186792 modified "2023-09-27" @default.
- W3204186792 title "Effect of bluff body addition in fuel-rich stream on reaction behaviours of large-proportion semicoke rich/lean blended combustion" @default.
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- W3204186792 doi "https://doi.org/10.1016/j.fuel.2021.122020" @default.