Development of a Micro Gas Turbine Combustion System for Fuel Oil: CFD-Lay-Out and Combustion Tests

Abstract

The current paper presents the development of a lean premixed prevaporized (LPP) combustion system for a micro gas turbine. A commercial spill return atomizer and a standard fuel oil pump as used in domestic burner applications were specified for the fuel supply system. The relatively large droplet sizes generated by this kind of atomizer system require careful design of the evaporation section of the combustion system. The usage of a LPP combustion concept implies the risk of self ignition and flash back. To avoid both, the knowledge of the ignition delay time and the flame speed of fuel oil are essential for the design of the combustion system. The paper describes the development process of the combustion system and presents experimental results for different geometries and operation conditions.