Fundamental Investigation on the High Intensity Combustion : 1st Report, On the Local Combustion Efficiency in an Upright Combustion Chamber

The local combustion efficiency and the local heat release rate in an upright cylindrical combustion chamber having a diameter of 100 mm and a length of about 1000 mm, were experimentally determined from the contents of combustion products. The burnt gases sampled from ten positions in the combustion chamber were analyzed with gaschromatograph. The experiments were carried out under the following conditions : Initial mean diameter of atomized fuel=40∼140 microns, air excess ratio=0.8∼1.6 Oil for a jet engine (JP-4) whose chemical compositions were known, was used as a fuel. In addition, the local combustion efficiency and the local temperature of burnt gas were determined theoretically and compared with experimental results. The theoretical results were in good agreement with experimental ones.