Nozzle-Geometry Effects on Upwind-Surface Properties of Turbulent Liquid Jets in Gaseous Crossflow
Nozzle-Geometry Effects on Upwind-Surface Properties of Turbulent Liquid Jets in Gaseous Crossflow
复制标题
喷嘴几何形状对气体横流中湍流液体射流迎风面特性的影响
DOI：
10.2514/1.49737
复制
发表时间：
2010
影响因子：
1.9
通讯作者：
K. Sallam
中科院分区：
文献类型：
--
作者：
A. R. Osta;K. Sallam
通过实验研究了喷嘴长径比和进口曲率对气体横流中湍流液体射流表面特性的影响。采用长径比分别为10、20和40的直喷嘴在气体横流中产生湍流液体射流。所用喷嘴的曲率半径分别为0.6、1.2和2.4。目前的研究仅限于小的奥内格数液体射流（Oh 110）。诊断包括双脉冲全息显微镜和阴影成像。测量包括液体射流表面特性、整个液柱的破裂位置以及破裂状态的转变。使用现象学分析对测量结果进行解释和关联。研究发现，喷油器通道长度决定了射流破碎长度，并对射流迎风面特性产生影响。
An experimental study to investigate the effect of nozzle length-to-diameter ratio and the inlet curvature on the surface properties of turbulent liquid jets in gaseous crossflow was carried out. Straight nozzles with length/diameter ratios of 10, 20, and 40 were used to generate turbulent liquid jets in gaseous crossflow. The radius of curvature ofthe nozzles used was 0.6,1.2, and 2.4. The present study was limited to small Ohnesorge number liquid jets (Oh 110). The diagnostics consisted of double-pulsed holographic microscopy and shadowgraphy. The measurements included liquid-jet surface properties, breakup location of the liquid column as a whole, and the breakup-regime transitions. The measurements were interpreted and correlated using phenomenological analyses. It was observed that the injector passage length plays a role in determining the breakup length and influences the characteristics of the jet upwind surface.