CAJ | 학술논문

应用PIV激光粒子图像测速仪对由离心式压力雾化喷嘴喷出的锥形液膜的破碎进行了实验研究.测得了不同压力下的扰动波波长、波速和振幅.研究结果表明,液膜半锥角随着液压的增加而增加,半波长的液膜段剥落后几乎立即破碎成液滴,看不到明显的液膜段收缩成液丝的过程.由实验拍摄的图像看,长、短扰动波同时存在,共同影响液膜的破碎.这些数据可用于发展锥形液膜初始雾化模型.
응용PIV격광입자도상측속의대유리심식압력무화분취분출적추형액막적파쇄진행료실험연구.측득료불동압력하적우동파파장、파속화진폭.연구결과표명,액막반추각수착액압적증가이증가,반파장적액막단박락후궤호립즉파쇄성액적,간불도명현적액막단수축성액사적과정.유실험박섭적도상간,장、단우동파동시존재,공동영향액막적파쇄.저사수거가용우발전추형액막초시무화모형.
An experimental study on the breakup of a conical liquid sheet from a pressure swirl atomizer was conducted by using a Particle Image Velocimetry (PIV) system. The variation of wavelength, wave speed and amplitude of wave versus liquid pressure was obtained. The results indicate that the cone half angle increases with liquid pressure. The stripped half wavelength liquid fragment seems to break into a series of drops immediately and no obvious contraction from liquid fragment to ligament is seen. The recorded images also show that both short and long wavelength waves exist simultaneously, and influence the breakup of the conical liquid sheet. The result of this study is useful for the purpose of developing and verifying the atomization model of spray produced by a pressure swirl atomizer.