高速自然超空泡射弹阻力特性试验研究

为了研究水下高速自然超空泡射弹的阻力特性,针对带有圆盘空化器的多锥体射弹模型,设计了多种结构参数的射弹模型,进行了高速射弹从空气射入水中形成超空泡的试验。通过对试验数据的分析和处理,得到了不同空化数、不同空化器直径以及不同射弹长细比对射弹阻力系数的影响。试验结果表明：在空化器直径和射弹长细比不变的情况下,随着空化数的增加,射弹阻力系数变化很小;在空化数和射弹长细比不变的情况下,随着空化器直径的增加,射弹阻力系数增大;在空化数和空化器直径不变的情况下,随着射弹长细比的增加,射弹阻力系数减小。试验结果为进一步研究高速超空泡射弹的水动力特性和水下弹道特性提供了参考。

Experimental research on drag characteristics of high-speed natural supercavitation projectile

In order to investigate the drag characteristics of high-speed natural supercavitation projectile, multi-configuration parameters of multi cone projectile models are designed for the ex periment in which the projectile is ripped into the water from the air by using the disk cavitator. Through the analysis and processing of experimental data, the effects of different cavitation numbers, cavitator diameters and slenderness ratios on drag coefficient are researched. It is shown that when the cavitator diameter and slenderness ratio keep stable, the drag coefficient of projectile changes slightly along with the increase of cavitation number; when the cavitation number and slenderness ratio keep stable, the drag coefficient of projectile increases along with the increase of cavitator diameter; when cavitation number and cavitator diameter keep stable, the drag coefficient of projectile decreases along with the increase of slenderness ratio. Furthermore, the experimental result gives a useful reference for investigating the hydrodynamic characteristics and the underwater trajectory of high-speed supercavitation projectile.