重型预混合压缩点火(PCCI)发动机曲轴角分辨流场表征
To achieve PCCI combustionwith limited heat release rates, the influence of charge stratification on combustion shouldbe investigated. In this paper a method is presented to achieve and measure charge stratification. As a first attemptto investigate the mixing, we measure the in-cylinder velocities using particle image velocimetry (PIV). From thesevelocities the turbulence intensities are derived, which give an indication of the mixing of charge. First results indicatethat the turbulence is homogeneous and that the swirl center shifts towards the center of the combustion chamber.Future measurements will also entail time resolved PIV measurements.