Robust Design of the Coaxial Jet Cluster Nozzle Burner for DME (Dimethyl Ether) Fuel

DME (dimethyl ether) is currently attracting worldwide attention due to its potential as a clean fuel. But, DME has a low auto-ignition temperature and a higher combustion velocity compared with other power generation gas fuels (LNG, LPG). Therefore, in the case of lean-premixed design to limit the formation of NOx in the burning zone, a shorter premixing length than that for natural gas is required. In this research, the main objective is the development of a low NOx emission and high efficiency combustion system that is suited to quick and uniform mixing between the air and gaseous DME. A coaxial jet cluster nozzle burner configuration is proposed as the low NOx combustion system, and 18 different configuration burners are designed and tested by the robust design. Based on the analysis of test results, the optimized configuration of a coaxial jet nozzle burner is selected.