Investigation of Gas Swirl Burner Characteristic ... - Jurnal Mekanikal

Jurnal Mekanikal December 2011Figure 14 : Swirlers with 6, 8 and 10 vane blades3.2.3 Experiment using Biomass FuelResults of the experiment was performed using an air flow rate in a gas burner of 294lpm, and a gas flow rate of 120 lpm for each swirl and are summarized below.3.2.3.1 Flame TemperatureTemperature range in thermocouple 1 (TC1) was 765 - 795°C, while the range forthermocouple 2 (TC2) was 624 - 694°C, as shown in Figure 15. The maximumtemperature occurred in the swirler of 8 vane blades, where there was a mixing of air andfuel in the gas burner and a favorable internal recirculation zone. The residence time of agas burner with 8 blades is longer due to a good internal recirculation zone that makes thefuel came out through the burner gas channel and burned completely before leaving thecombustion chamber. Thus, along with the complete combustion of the gaseous fuel, ahigher flame temperature was obtained.1000Temperature ( 0 C)8006004002000TC1TC24 6 8 10 12Number of Swirl BladeFigure 15 : Comparison between different number of swirler vane blades3.2.3.2 Heat ReleaseExperimental results Figure 16 show that the heat release produced was 10.3 kJ/s – 11.15kJ/s. Maximum heat release rate occurred in swirl with 8 blades. Heat release rate isobtained from the transfer of heat produced during burning to the water surrounding thecombustion chamber.28