Flammability characteristics of butanol fuel blends at various initial temperatures

The paper presents experimental investigation results of flammability characteristics for butyl-alcohol-based substances. Two parameters were determined: maximum explosion pressure and maximum rate of explosion pressure rise. Tests included pure n-butanol, pure sec-butanol and mixtures at volumetric ratios of 1:1, 1:3 and 3:1. For each fuel whole range of flammable volumetric concentrations was tested. Measurements were performed in thermally stabilized spherical combustion chamber at various temperatures such as 413K (140°C), 393K (120°C), 373K (100°C), 353K (80°C), 333K (60°C). Initial pressure was equal to ambient.