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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Study on draining off water mechanism and interaction characteristic of high-temperature and high-pressure combustion-gas jets with the water
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Study on draining off water mechanism and interaction characteristic of high-temperature and high-pressure combustion-gas jets with the water

机译：用水耗尽高温和高压燃烧 - 气射流的水机理和相互作用特性研究

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摘要

A new method of underwater launching is proposed to overcome the water resistance in the barrel and realize continuous launching by forming gas curtain without any complex device. Namely, part of gunpowder combustion-gases behind the projectile is guided to the space in front of underwater projectile by opening pores around the circumference of the warhead, to form a dry launching path. Based on this, the expansion process of combustion-gas jets in the confining tube filled with water, especially complex interaction of high-pressure and high-temperature combustion-gas jets and water is studied by experiments and numerical calculations. The results show that, when the high-velocity combustion-gases inject into motionless liquid environment, multiple Taylor cavities are formed and typical structure of Taylor cavity presents two parts, including bubble head and combustion-gas path. The distribution of the recirculation zone is an important factor for the flow field structure and the effect of draining off water. The recirculation zone of the central jet expands downstream with time going on and is decreasing until it disappears. While, the recirculation zone of lateral jet is strengthening with developing downstream. In the whole expansion process, lateral combustion-gas jet plays a significant role on radial expansion process of Taylor cavities.
机译：提出了一种新的水下发射方法来克服桶中的耐水性，并通过在没有任何复杂装置的情况下形成气体窗帘来实现连续发射。即，射弹背后的火药燃烧气体的一部分是通过在弹头的周围的孔口上打开毛孔来引导水下射弹的空间，形成干燥的发射路径。基于此，通过实验和数值计算研究了填充水的限制管中的燃烧 - 气射流的膨胀过程，特别是高压和高温燃烧 - 气体喷射和水的复杂相互作用。结果表明，当高速燃烧气体注入一动不动机的液体环境时，形成多个泰勒腔，泰勒腔的典型结构呈现两个部分，包括气泡头和燃烧 - 气体路径。再循环区的分布是流场结构的重要因素和排出水的影响。中央喷射的再循环区随着时间的推移而膨胀，直到它消失。虽然，横向射流的再循环区域正在加强下游。在整个膨胀过程中，横向燃烧 - 气动喷射在泰勒腔的径向膨胀过程中起着重要作用。

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