一、引言为了明确燃烧室内混合气体的形成和燃烧过程,那就必须解决许多问题,其中最大的问题之一,算是缺乏有关燃烧室内气流情报资料吧。在燃烧室内测定气流之所以困难,原因是气流处于温度、压力及流动速度、方向发生急剧变化的不稳定流状态的缘故。内燃机燃烧室内气体流速的测定方法有:热丝式风速计、放电法和激光多普勒流速计等。另外,为判断进气系统涡流形成能力,经 I. INTRODUCTION In order to clarify the formation and combustion process of mixed gases in a combustion chamber, many problems must be solved. One of the biggest problems is the lack of information about the airflow in a combustion chamber. The reason why air flow is difficult to measure in a combustion chamber is that the air flow is in a state of unstable flow whose temperature, pressure and flow velocity are sharply changed in direction. Gasoline combustion chamber gas flow rate determination methods are: hot wire anemometer, discharge method and laser Doppler flowmeter. In addition, to determine the intake system eddy current formation capacity