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 -