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对新型压电晶体控制的外开轴针式喷油器在不同边界条件下实现的圆锥状喷雾的基本特征,包括喷雾锥角、喷雾轴向贯穿距及每循环喷油量进行了分析与研究,并在此基础上提出了针对这种外开轴针式喷油器的喷雾轴向贯穿距经验公式.为了能够对喷雾的空间分布能力及油气混合特性进行定性分析,提出了喷雾体积放大倍率的概念.采用超高速摄影相机获得的可视化结果表明,这种喷油器形成的空心圆锥状喷雾实际上是由许多直径较小的“油线”组成的.油线结构的发现为进一步分析及研究其喷雾特性提供了参考和依据.
The basic characteristics of the conical sprays realized by the novel piezoelectric crystal-controlled open-axial injectors under different boundary conditions, including the spray cone angle, axial spray penetration and the amount of fuel injected per cycle, were analyzed Based on this, an empirical formula for axial penetration of the injector is proposed.In order to be able to qualitatively analyze the spatial distribution of spray and the mixing characteristics of oil and gas, the spray volume magnification The visualization of the results obtained with a superhigh-speed camera showed that the hollow conical spray created by this injector actually consisted of many smaller “oil lines.” The discovery of the oilline structure was further Analysis and study of its spray characteristics provide a reference and basis.