通气航行体表面压力脉动特性实验研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (17) : 85-90.

论文

通气航行体表面压力脉动特性实验研究

张孝石1，王聪1，张耐民2，赵成功1

作者信息 +

Experimental study on pressure fluctuating characteristic around ventilated vehicle

ZHANG Xiao-shi1, WANG Cong1, ZHANG Nai-min2, ZHAO Cheng-gong1

Author information +

文章历史 +

摘要

通过水洞实验对水下通气航行体云状空泡进行了实验研究，对比分析了不同空化数下航行体表面压力脉动特性。为了研究通气空化的脉动特性，通过动态测力系统测量了航行体表面的压力，并对压力信号进行了频谱分析，得到了通气航行体表面压力在不同空化数下通气空化的频域特征。实验得到以下结论：通气空泡形态与其对应的表面压力脉动特征随着空化数的变化存在明显不同的非定常特性，通气空化流场形态与表面压力脉动特征频率有较高的相关性。并且不同空化数下通气空化压力脉动主要是由大尺度空泡周期性脱落引起，表面压力的特征频率与空泡的断裂脱落相对应；随着空化数的减小，航行体平均表面压力峰值逐渐增大，空泡脱落后表面压力波动逐渐趋于平缓。

Abstract

The cavity around the ventilated vehicle was invested in water tunnel. The experiment was carried out to study cavity characteristics with different cavitation number. The experiment also studied the fluctuating hydrodynamics around the vehicle. In order to analyze the cavity stability around the vehicle in the water flow. Dynamic force measurement system was used to record the surface pressure of ventilated vehicle under different cavitation numbers. The fluctuating hydrodynamic characteristics were obtained. The results show that cavity shapes reveal the patterns of flow in different development stages, which are strongly correlated with unsteady dynamics characteristics. Frequency characteristics of the unsteady cavitating flows are different under different cavitation conditions. For the ventilated vehicle, the frequency pulsation characteristics are caused by the large cloud break-off and shedding at its surface zone. The peak level increases with decrease in cavitation number and the surface pressure fluctuation is small.

导出引用

张孝石1，王聪1，张耐民2，赵成功1. 通气航行体表面压力脉动特性实验研究[J]. 振动与冲击, 2017, 36(17): 85-90

ZHANG Xiao-shi1, WANG Cong1, ZHANG Nai-min2, ZHAO Cheng-gong1. Experimental study on pressure fluctuating characteristic around ventilated vehicle[J]. Journal of Vibration and Shock, 2017, 36(17): 85-90

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