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Abstract
Flame propagation along linear, vertically-oriented matchstick arrays on inclined base board is studied experimentally. The angles between the base board and the horizontal are 0°, 20°, and 40°. Both uphill burning and downhill burning are studied. The temperature field within the flame zone is measured, which indicates that the preheated region increases as the base board angle increases. Schlieren photographs of burning matchstick arrays also support this observation. Theoretical analysis using the concepts of the ignition temperature and the standoff distance of an envelope flame provides good agreement with the experimental results.