CAVITATION IN NOZZLES OF PLAIN ORIFICE ATOMIZERS WITH VARIOUS LENGTH-TO-DIAMETER RATIOS
CAVITATION IN NOZZLES OF PLAIN ORIFICE ATOMIZERS WITH VARIOUS LENGTH-TO-DIAMETER RATIOS
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DOI：
10.1615/atomizspr.v20.i6.30
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发表时间：
2010-01-01
影响因子：
1.2
通讯作者：
Tomiyama, Akio
中科院分区：
文献类型：
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作者：
Sou, Akira;Hosokawa, Shigeo;Tomiyama, Akio
通过对空化和射流同时进行高速显示，研究了不同长径比（L/D）的二维和圆柱形喷嘴中的空化现象及其对液体射流变形的影响。修正的空化数的适用性定量预测超空泡形成的喷嘴与各种LID比也检查。结果，得到以下结论。(1)修正后的空化数ac可以用来预测不同形状和长径比喷管中的超空化现象。(2)当空化长度小于喷嘴直径D的两倍时，由直径（L（cav）/D）而不是由喷嘴长度（L（cav）/L）归一化的空化长度可以表示为sigma（c）的唯一函数。(3)长喷嘴（L/D）内一旦形成空泡膜，
Cavitation in two-dimensional and cylindrical nozzles with various length-to-diameter (L/D) ratios and its effects on liquid jet deformation are investigated by carrying out simultaneous high-speed visualization of the cavitation and jet. The applicability of a modified cavitation number to quantitative prediction of supercavitation formation for nozzles with various LID ratios is also examined. As a result, the following conclusions are obtained. (1) The modified cavitation number a c can predict supercavitation in nozzles of various shapes and L/D ratios. (2) When cavitation length is less than twice the nozzle diameter D, the cavitation length normalized by the diameter (L(cav)/D), rather than by the nozzle length (L(cav)/L), can be expressed as a unique function of sigma(c). (3) Once a cavitation film is formed in long nozzles (L/D