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介绍了一种新的PIV(Particle Image Velocimetry)测速技术——白光气泡图象测速技术。用电解水产生的氧泡作为流场示踪粒子,用普通闪光灯组作为PIV底片记录的多脉冲光源。其主要优点是:对实验设备无污染;不需要高能量激光光源;并可获得高信噪比的PIV底片。
A new Particle Image Velocimetry (PIV) velocimetry technique is introduced - white light bubble image velocimetry. Oxygen bubbles generated by the electrolyzed water were used as the tracer particles in the flow field and were recorded as multi-pulsed light sources by the ordinary flash unit as the PIV negative film. Its main advantages are: no pollution to the experimental equipment; no need of high-energy laser light source; and PIV film with high signal-to-noise ratio.