The smaller the jetorifice with quicker jet velocity, the larger the color Doppler jet area(P<0.001).
射流口径越小（射流速度越大），射流面积越大（P＜0．001）。
2
The synthetic jet exhibits self-similarity and is like the conventional jet only at distances greater than 10 times the orifice diameter away from the orifice.
在离开喷口10倍于喷口直径的距离后，合成喷与常规喷一样具有自相似性。
3
PIV experimental study of flow structures of synthetic jet arrays which had different orifice spacing was carried out.