The smaller the jet orifice 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）。
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。
PIV experimental study of flow structures of synthetic jet arrays which had different orifice spacing was carried out.
对不同出口间距零质量射流组的流场结构进行了PIV实验。
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