通气参数影响超空泡形态的研究

为获得低速段水下航行体形成通气超空泡的规律,设计了在可连续通气水洞中对航行体缩比模型的通气超空泡试验,研究了通气超空泡形态与通气参数之间的关系.通过改变水洞工作段的来流速度和压力、通气压力和通气流量等因素,获得了一系列不同形态的通气超空泡,分析了空泡的形态与通气系数之间的关系,研究表明通气空泡直径和长度均随通气系数的增大而增大,但是它们都是有一个极限值的.随着速度的增大,自然空化的影响逐渐增强,通气超空泡对通气的依赖性逐渐减弱.

Experimental study on effect of ventilation parameters on ventilated supercavity shapes

In order to study the ventilated supercavity of the underwater vehicle in low speed,the experiments carried out in a ventilated cavitation water tunnel which can be ventilated continuatively.The relations between the ventilated supercavity shapes and ventilation parameters are analyzed through a performed ventilated experiment on a model of underwater vehicle in the water tunnel.With changing the velocity and pressure of the water tunnel,pressure and flow rate of the ventilation,a series of ventilated supercavities with shape controllable and drag reducible are got.The experimental results shows that the lengths and diameters of ventilated cavity increase as the ventilation coefficient increases,but have limits.With the effect of natural cavitation increases with the velocities of flow increased,the dependence of ventilated supercavity on ventilation decreases.