Experimental Investigation on the Pressure Characteristics of Cavity Closure Region

在 cavitating 流动和压力分发的最复杂的部件是在洞闭合线的流动。cavitating 流动和压力分发在这个区域提供流动域细节的批评方面。水动力学的压力结果的积分强迫，在 supercavitating 车辆的设计显示支配。一个实验在一条水隧道被执行调查洞闭合区域的压力特征。通风方法被采用产生人工的洞，并且通风率因此被调整获得需要的洞长度。一连串的压力变换器在洞闭合线下面被生在这个区域捕获压力分发。当流动是 non-axisymmetric 时，在洞闭合区域有一座压力山峰的试验性的结果表演，和在空间的压力的上升率趋于在迎风的方面更高。短暂压力变化也在洞形成过程期间是现在。在这份报纸的测量的方法能被工程师引用。学习洞闭合的流动模式的结果帮助区域，和它能也被用来分析 supercavitating 车辆水动力学的形成。

The most complicated component in cavitating flow and pressure distribution is the flow in the cavity closure line. The cavitating flow and pressure distribution provide critical aspects of flow field details in the region. The integral of pressure results of the hydrodynamic forces, indicate domination in the design of a supercavitating vehicle. An experiment was performed in a water tunnel to investigate the pressure characteristics of the cavity closure region. Ventilation methods were employed to generate artificial cavity, and the ventilation rate was adjusted accordingly to obtain the desired cavity length. An array of pressure transducers was laid down the cavity closure line to capture pressure distribution in this region. The experimental results show that there is a pressure peak in the cavity closure region, and the rise rate of pressure in space tends to be higher in the upwind side when the flow is non-axisymmetric. The transient pressure variations during the cavity formation procedure were also present. The method of measurement in this paper can be referenced by engineers. The result helps to study the flow pattern of cavity closure region, and it can also be used to analyze the formation of supercavitating vehicle hydrodynamics.