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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

THE EFFECT OF ININTIAL TEMPERATURE DISTRIBUTION ON THE DETERMINATION OF THE LAMINAR BURNING VELOCITY BY USING CONSTANT-VOLUME BOMB

Get access (open in a dialog) DOI: 10.1615/IHTC16.cat.023352
pages 1589-1595

摘要

The effects of the non-uniform distribution of the initial temperature on the determination of the laminar burning velocity using the outwardly propagating spherical flame were numerically studied, and related experiments were carried out to verify the accuracy of the numerical results. The results of the distribution of temperature inside the constant-volume vessel show that the temperature of fluid medium tends to rise after the first descending along the gravity direction in the heating state. And the non-uniformity of the distribution of temperature of the fluid medium in the vessel increases with the objective temperature. At the same time, the numerical results of H2-air two-dimensional spherical flame propagation model with detailed kinetic mechanism show that the non-uniform distribution of temperature in the vessel has a significant effect on the determination of the laminar burning velocity. Under the initial conditions of uniform and non-uniform distribution of the initial temperature, the relative deviation of measured laminar burning velocity is up to 7%. Consequently, it is quite necessary to evaluate the temperature distribution of fluid medium inside the constant-volume vessel before carrying out the spherical flame experiments to determine the laminar burning velocity.