High-pressure hydrogen/carbon monoxide syngas turbulent burning velocities measured at constant turbulent Reynolds numbers

• Published in: International journal of hydrogen energy Vol. 37; no. 14; pp. 10935 - 10946
• Main Authors: Chiu, Chien-Wen, Dong, Yi-Chih, Shy, Shenqyang Steven
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.07.2012; Elsevier
• Subjects: Alternative fuels. Production and utilization; Applied sciences; Energy; Exact sciences and technology; Fuels; High-pressure lean premixed turbulent combustion; Hydrogen; Hydrogen/carbon monoxide syngas combustion; Turbulent burning velocities; Turbulent Damköhler number; Turbulent Reynolds number; High-pressure lean premixed turbulent combustion; Turbulent Damköhler number; Hydrogen/carbon monoxide syngas combustion; Turbulent burning velocities; Turbulent Reynolds number; Turbulent flame; Hydrogen; Lithium; Explosions; Synthesis gas; Combustion velocity; High pressure; Carbon monoxide; Hydrogen burning
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2012.04.023

Using a double-chamber explosion facility, we measure high-pressure turbulent burning velocities (ST) of lean syngas (35%H2/65%CO) spherical flames at constant turbulent Reynolds numbers (ReT ≡ u′LI/ν) varying from 6700 to 14,200, where the root-mean-square turbulent fluctuation velocity (u′) and the integral length scale (LI) 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 ReT, ST decreases similarly as laminar burning velocities (SL) with increasing p in minus exponential manners. Moreover, at constant p, ST/SL increases noticeably with increasing ReT. It is found that the present very scattering ST/SL data at different p and ReT can be nicely merged onto a relation of ST/u′ = 0.49Da0.25, where Da is the turbulent Damköhler number and values of ST/u′ tends to level-off when Da > 160 and p > 0.7 MPa. ► An explosion facility for high-pressure syngas combustion is proposed. ► High-pressure syngas burning velocities at fixed Reynolds numbers are measured. ► General correlations of syngas turbulent burning velocities are proposed.