副室式燃焼器による準定容乱流予混合燃焼の促進 : 放射状多孔ノズルによる燃焼促進とピストン動特性の熱力学的考察(熱工学,内燃機関,動力など)

概要

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To examine the effects of multiple radial flame jets on combustion enhancement characteristics, two types of divided chamber combustors are used; a constant-volume and a quasi-constant-volume divided chamber combustor. A hemi-sphere sub-chamber is equipped on the top side of a cylindrical combustor, whereas a piston-cylinder system is installed on the bottom side. 40 small nozzles are regularly arranged on the sub-chamber, from which multiple radial flame jets issue into the main chamber. Stoichiometric mixture of either propane-air or DME-air is used. In the constant volume experiments, measurements of pressure history and high-speed direct observations of the burning process in the main chamber are made by varying the nozzle diameter and the sub-chamber volume as two main parameters. In the quasi-constant volume combustion, the piston displacement is also measured simultaneously with the pressure history. The enhancement behavior of multiple radial flame jets is estimated, based on a simple thermodynamic analysis of a series of pressure histories.
2009-05-25