Experimental Study on Temperature Distribution and Flame Length in a Narrow Channel Combustion Chamber

Abstract

Temperature distribution and flame length in narrow channel combustion chamber are significant parameters in the design of narrow channels for safe combustion. Hence, the experimental study on effects of temperature distribution on flame length in narrow channel combustion as presented in this paper. The maximum temperature and flame length, for swirl angles 20°, 30°, 40°, 50° and 60°during combustion were measured respectively, using type K thermocouple and measuring rule. Temperature measurement for radial distance from the centre of the chamber towards the outer surface interacting directly with the environment was also taken for six points. Findings showed the maximum temperatures (930, 1065, 1101, 1139, 1185 and 1221) oC at flame length of (2100, 1500, 1450, 1200, 1050 and 920) mm for 0, 20, 30 40 50 and 60 degrees swirl angles respectively. As the swirl angle increased, the maximum temperature increased while the flame length decreased. The curve blade swirler aided proper mixing of the fuel and air by generating vortex yielded better combustion efficiency and characteristics in terms of temperature and flame length. Therefore, the relationship between temperature distribution, flame length and swirl cannot be exaggerated in safety. Furthermore, a prediction model equation was developed using the data collected for predicting the flame length for given swirl angle and maximum temperature to determine the possible flame length. The maximum deviation between the actual flame length and the predicted flame length was about 2.6%.

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