In this paper, an experimental study of boiling-up of a superheated water jet at an outflow through a short slit nozzle into the atmosphere in the presence of a passive swirler (twisted tape, wire winding) has been carried out in order to affect and control the jet behavior. The evolution of jet disintegration with increasing liquid superheat during the outflow both from the saturation line and at a fixed initial pressure has been traced. The characteristic structures and shapes of the flow have been identified. The relationship between the jet shape and various mechanisms of vaporization has been noted. For small superheats when outflowing from the saturation line, both unswirling jet shapes and swirling jet ones have looked the same. When a liquid outflows at a fixed initial pressure, a more structured parabolic jet profile with a decreasing opening angle is observed when the pressure increases. The differences have been revealed at moderate superheats, when the parabolic jet profile has been replaced by a trapezoidal jet one with increasing temperature along the isobars. It has been established that in the case of attainable superheats, the intensive process of boiling-up plays the main role in the flow formation. In this case the jet shape remained unchanged at outflows both from the saturation line and from the isobars. In the experiments conducted, manifestations of the two-phase jet instability, which have been in experiments with a passive swirler for a short cylindrical nozzle have not been observed.

中文翻译：

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使用被动旋流器雾化过热水射流

在本文中，进行了一个实验研究，该实验研究了在有被动旋流器（扭带，绕线）的情况下，通过短缝喷嘴流出的过热水射流沸腾到大气中的过程。控制喷射行为。在从饱和管线和固定的初始压力流出期间，随着液体过热的增加，射流崩解的发展已经被追踪。已经确定了流的特征结构和形状。已经注意到射流形状与各种汽化机理之间的关系。对于从饱和线流出的小过热，不旋转的射流形状和旋转的射流形状看起来都相同。当液体以固定的初始压力流出时，当压力增加时，观察到结构化的抛物线形射流轮廓，其开角减小。当沿等压线的温度升高时，抛物线形的射流轮廓已被梯形射流所代替，在中等过热度下已显示出差异。已经确定，在可达到的过热情况下，密集的沸腾过程在流动形成中起主要作用。在这种情况下，射流的形状在从饱和线和等压线流出时都保持不变。在进行的实验中，没有观察到在短圆柱喷嘴的被动旋流器实验中出现的两相射流不稳定性的表现。当抛物线形的射流轮廓已被梯形射流所替代，且沿等压线的温度升高。已经确定，在可达到的过热情况下，密集的沸腾过程在流动形成中起主要作用。在这种情况下，射流的形状在从饱和线和等压线流出时都保持不变。在进行的实验中，没有观察到在短圆柱喷嘴的被动旋流器实验中出现的两相射流不稳定性的表现。当抛物线形的射流轮廓已被梯形射流所替代，且沿等压线的温度升高。已经确定，在可达到的过热情况下，密集的沸腾过程在流动形成中起主要作用。在这种情况下，射流的形状在从饱和线和等压线流出时都保持不变。在进行的实验中，没有观察到在短圆柱喷嘴的被动旋流器实验中出现的两相射流不稳定性的表现。在这种情况下，射流的形状在从饱和线和等压线流出时都保持不变。在进行的实验中，没有观察到在短圆柱喷嘴的被动旋流器实验中出现的两相射流不稳定性的表现。在这种情况下，射流的形状在从饱和线和等压线流出时都保持不变。在进行的实验中，没有观察到在短圆柱喷嘴的被动旋流器实验中出现的两相射流不稳定性的表现。