应用相多普勒粒度仪研究喷雾特性

应用相多普勒粒度分析仪（ＰＤＰＡ）获得了双油路喷嘴详细的喷雾特性。将ＰＤＰＡ测得的空间点数据分别沿扫描径向和所在测量截面积分，得到液滴的线平均和面平均直径。ＰＤＰＡ的线积分数据比马尔文仪测得的线积分值要大；面积分平均直径与液膜波不稳定理论计算的初始平均直径相符合。结果表明，对描写喷雾特性和确定喷雾质量，ＰＤＰＡ是可靠的测量装置。

INVESTIGATION OF SPRAY CHARACTERISTICS BY USING PHASE DOPPLER PARTICLE ANALYZER

Detailed spray characteristics were obtained for a dual orifice atomizer using a phase Doppler particle analyzer(PDPA)in this study.The PDPA measured point data were integrated into the line averaged drop sizes over radial traverses and the cross section averaged sizes over the whole measured sections.The integrated PDPA data are greater as compared with the line of sight measurements given by a Malvern instrument,but reasonably consistent with the predictions based on the wave instability concept.The results from the investigation show that the PDPA is an effective instrument for providing a reliable approach of describing spray characteristics and determining the spraying quality.