一、前言内燃机的燃烧通常多以紊乱的非稳定流动方式进行,不用说混合气的形成和燃烧过程,就是燃烧生成物等也在很大程度上受气缸内气体流动的控制,这些已是众所周知的事实了。因此,作为既考虑燃油经济性又实现低公害燃烧的有力方法(例如通过进排气系统和燃烧室的形状和配置等设计),从控制点燃之前的混合气流动和燃烧时间的气缸内气体流动出发,多次尝试实测过这些气体的流动。但是,气缸内的气体流动一般不仅紊乱,而且流动方向和流 I. INTRODUCTION Combustion of internal combustion engines is usually conducted in turbulent and unsteady flow. Needless to say, the formation and combustion process of mixed gas, that is, combustion products, etc. are also largely controlled by the gas flow in the cylinders. These are well-known The fact that Therefore, from the standpoint of fuel economy and the realization of a low-pollution combustion method (for example, through the design of the intake and exhaust system and the shape and configuration of the combustion chamber and the like), the gas flow in the cylinder before the ignition and the combustion time are controlled Starting, many attempts to measure the flow of these gases. However, the gas flow inside the cylinder is generally not only disturbed, but also the flow direction and flow