爆炸水幕高度变化规律实验研究

为研究小当量装药近水面水下爆炸时水幕高度的变化规律,进行了0.6g RDX等高圆柱形装药在14个起爆深度的水下爆炸实验.采用两台同步高速录像机分别记录水幕运动和气泡脉动的图像,通过进一步的数据处理,获得水幕高度随起爆深度和时间的变化规律.对实验数据进行量纲一化处理,并采用二元多项式拟合的方法,获得了量纲一化水幕高度的工程计算模型.该模型计算结果与1kg RDX装药海上实验结果进行对比,所得误差均小于5%.研究结果表明,所获得的量纲一化水幕高度工程计算模型比Swisdak计算公式更具有通用性,适合小当量装药近水面水下爆炸时水幕高度的工程计算.

Experimental Research on Height Variation of Explosion Plumes

Research on height variation of plumes, which were formed by near free-surface underwater explosion of small TNT equivalent, has been done. With 0.6g RDX cylindrical charge, underwater explosion experiments were carried out at 14 detonation depth. Using two synchronous high speed video cameras, the water movement and bubble images were recorded and the height variations of plumes versus explosion depth and rising time were achieved through further data processing. By dimensionless treatment and polynomial fitting method, the engineering calculation model of the dimensional height was obtained. Comparing the calculated results with experimental ones for charge RDX of 1kg weight, the error was less than 5%. Research results show that the obtained engineering calculation model of the dimensionless plume is more versatile than Swisdak calculation formula. It is suitable for the height engineer calculation of near free-surface underwater explosion with small equivalent charge.