狭隘空間での水素－プロパン－空気予混合火炎の伝ぱ特性に関する基礎的研究

抄録

The present study is performed to investigate experimentally the deflagration flame of hydrogen-propane-air mixtures propagating in a narrow space simulated channel ( t10×w150×h500 mm ) with special attention to flame acceleration and deceleration. In order to examine the effects of C₃H₈ addition and the grids on the flame propagation speed, the mixtures with different equivalence ratios (ϕ=0.8~1.4) with different propane additional rates (δ_p=0.2~1.0) are prepared. The flame shape and propagation speeds are obtained by using sequential shadowgraph or schlieren images recorded under conditions which are the ignition near the bottom and the upper-end open of channel. It was found that as the additional rate of C₃H₈ increase, the acceleration of flame propagation tends to be suppressed, especially for lean mixtures.