A Study on the Diesel Spray by Means of Image Analysis of Shadow Photographs

陰影寫眞의 畵像解析에 의한 디이젤 噴霧의 硏究

A new measuring method is proposed, which measures the atomization characteristics of a non-evaporating, axi-symmetric diesel spray by means of an image analysis of high speed shadow photographs. The instantaneous sauter mean diameter and the fuel concentration in the spray are calculated of the splay axis and in the radial direction and the data of the fuel injection rate, using an onion peeling model. Some examples of application of this method to eight different diesel sprays are demonstrated, and the results are compared to predicted results by the conventional immersion method and a quasi-steady one dimensional spray model.

본 논문에서는 비증발 디이젤 분무의 고속도음영사진을 화상해석 함으로서, 분무선단지달거리와 분무용 이외에 어떤 연문의 분무속 전체 액적군의 평균입자경(sauter mean diameter)과 분무내 연료농도분포를 동시에 측정할 수 있는 새로운 측정법을 제시한다.