TY - JOUR
T1 - High-pressure hydrogen/carbon monoxide syngas turbulent burning velocities measured at constant turbulent Reynolds numbers
AU - Chiu, Chien Wen
AU - Dong, Yi Chih
AU - Shy, Shenqyang Steven
N1 - Funding Information:
The continuous support by the National Science Council, Taiwan under various grants ( NSC 98-2221-E-008-058-MY3 ; 100-3113-E-008-004 ; 100-ET-E-008-001-ET ; 101-3113-E-008-004 ) is gratefully acknowledged. The authors wish to thank two anonymous reviewers for their valuable comments.
PY - 2012/7
Y1 - 2012/7
N2 - Using a double-chamber explosion facility, we measure high-pressure turbulent burning velocities (S T) of lean syngas (35%H 2/65%CO) spherical flames at constant turbulent Reynolds numbers (Re T ≡ u′L I/ν) varying from 6700 to 14,200, where the root-mean-square turbulent fluctuation velocity (u′) and the integral length scale (L I) are adjusted in proportion to the decreasing kinematic viscosity of reactants (ν) at elevated pressure (p) up to 1.2 MPa. Results show that, contrary to popular scenario for turbulent flames, at constant Re T, S T decreases similarly as laminar burning velocities (S L) with increasing p in minus exponential manners. Moreover, at constant p, S T/S L increases noticeably with increasing Re T. It is found that the present very scattering S T/S L data at different p and Re T can be nicely merged onto a relation of S T/u′ = 0.49Da 0.25, where Da is the turbulent Damköhler number and values of S T/u′ tends to level-off when Da > 160 and p > 0.7 MPa.
AB - Using a double-chamber explosion facility, we measure high-pressure turbulent burning velocities (S T) of lean syngas (35%H 2/65%CO) spherical flames at constant turbulent Reynolds numbers (Re T ≡ u′L I/ν) varying from 6700 to 14,200, where the root-mean-square turbulent fluctuation velocity (u′) and the integral length scale (L I) are adjusted in proportion to the decreasing kinematic viscosity of reactants (ν) at elevated pressure (p) up to 1.2 MPa. Results show that, contrary to popular scenario for turbulent flames, at constant Re T, S T decreases similarly as laminar burning velocities (S L) with increasing p in minus exponential manners. Moreover, at constant p, S T/S L increases noticeably with increasing Re T. It is found that the present very scattering S T/S L data at different p and Re T can be nicely merged onto a relation of S T/u′ = 0.49Da 0.25, where Da is the turbulent Damköhler number and values of S T/u′ tends to level-off when Da > 160 and p > 0.7 MPa.
KW - High-pressure lean premixed turbulent combustion
KW - Hydrogen/carbon monoxide syngas combustion
KW - Turbulent Damköhler number
KW - Turbulent Reynolds number
KW - Turbulent burning velocities
UR - http://www.scopus.com/inward/record.url?scp=84862698279&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2012.04.023
DO - 10.1016/j.ijhydene.2012.04.023
M3 - 期刊論文
AN - SCOPUS:84862698279
SN - 0360-3199
VL - 37
SP - 10935
EP - 10946
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 14
ER -
