三次元LDVによる内燃機関シリンダ内定常流速測定 : 三次元LDVの特性について

概要

論文の詳細を見る
Characteristics of three dimensional LDV, consisting of a single focus lens, two colors and five beams, as a tool of in-cylinder flow velocity measurement were investigated by simulation and experiment. In this type of 3D-LDV, the on-axis velocity component is feasible to accept a false value when a center beam is deflected slightly from the optical on-axis direction. The more unstableness of cycle period of doppler burst signal gives rise to the higher on-axis velocity turbulence than the other velocity component in a counter type signal processor being used. Under the higher fluctuation of velocity, the larger count-cycle number and the lower shifting frequency, however, the on-axis velocity turbulence is more suppressed. In a conventional dual beam LDV, turbulence measurement errors would be observed under the particular conditions. Through in-cylinder velocity measurement, the on-axis velocity turbulence and its correlation with the other component were clarified to reveal higher and certified by the simulation.
一般社団法人日本機械学会の論文
1992-01-25