Measurements of Three Dimentional Flow of an Engine Using Flow Visualization Adopted Color Layers. 1st Report. Examination of Principle and Development of Fundamental Measuring System.

Abstract

Many papers have been published on measuring in-cylinder flow of an engine, such as using hot wire anemometer or laser doppler velocimeter. Also the technique of flow visualization becomes more and more precise because of using high performance computers and development of softwares to analyze the imeges, and technique of flow visualization can be usually adapted to two dimensional flow measurement. The method proposed in this paper, using color layers, is to measure the two dimentional velocity from the length of tracer image as usual analysis, and velocity perpendicular to the image plane can be derived from the color, that is the location of tracer and the time of exposure to take the image. A fundamental measuring system was developed and examined the principle of color layers for measuring three dimensional position. It was confirmed that the developed measuring system and the measuring principle was valid to measure the three dimensional location.