TY - JOUR

T1 - Study on turbulent burning velocity of outwardly propagating hydrogen-air flames with turbulence Karlovitz number

AU - Kitagawa, Toshiaki

AU - Nakahara, Takashi

AU - Kado, Kunihiro

AU - Takeo, Tomohiro

N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2010/9

Y1 - 2010/9

N2 - Outwardly propagating hydrogen-air turbulent flames were studied at the equivalence ratios from 0.6 to 1.0 and the initial pressures from 0.10 to 0.50 MPa. Turbulence intensity, u' was set to 0.80 to 1.59 m/s. The Markstein number decreased for increasing pressures and for small equivalence ratios. The ratios of turbulent to unstretched laminar burning velocities at a constant Peclet number increased with increasing turbulence Karlovitz number and decreasing Markstein number at a constant pressure. This ratio of burning velocities increased with increasing pressure at the equivalence ratios of 0.6 and 0.8. At the equivalence ratio of 1.0, however, it did not increase with increasing pressure although the Markstein number reduced with pressure.

AB - Outwardly propagating hydrogen-air turbulent flames were studied at the equivalence ratios from 0.6 to 1.0 and the initial pressures from 0.10 to 0.50 MPa. Turbulence intensity, u' was set to 0.80 to 1.59 m/s. The Markstein number decreased for increasing pressures and for small equivalence ratios. The ratios of turbulent to unstretched laminar burning velocities at a constant Peclet number increased with increasing turbulence Karlovitz number and decreasing Markstein number at a constant pressure. This ratio of burning velocities increased with increasing pressure at the equivalence ratios of 0.6 and 0.8. At the equivalence ratio of 1.0, however, it did not increase with increasing pressure although the Markstein number reduced with pressure.

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U2 - 10.1299/kikaib.76.769_1426

DO - 10.1299/kikaib.76.769_1426

M3 - Article

AN - SCOPUS:78649860252

SN - 0387-5016

VL - 76

SP - 1426

EP - 1432

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

IS - 769

ER -