Abstract
A series of experiment of the in-cylinder flow measurement has been carried out by using a laser Doppler anemometer (LDA). The purpose of the study is for making standard database of the flow structure of in-cylinder flow. The database can be used for the verification of the numerical simulation. The velocity components of vertical- and swirl-directions are measured individually. The test engine made by Fuji heavy industrial has transparent sapphire cylinder for optical access. The test condition is 600 rpm with motoring condition. The mean velocity maps are indicated by using ensemble averaged data with crank angle window of 1 degree. The rms velocity is also calculated from the data. The flow structure by each crank angle can be clarified. In addition, the effect of tumble generation valve (TGV) on the flow structure is also evaluated.
