摘要
以脉冲水炮用聚能喷嘴为研究对象,建立其发射特性的数学模型;应用MATLAB中的动态仿真工具软件包SIMULINK,对射流的出口速度与喷嘴内的静压力进行仿真研究。结果表明,对于指数型聚能喷嘴而言,随着喷嘴出口截面变化率的增加,脉冲射流速度亦明显增大;当喷嘴出口截面变化率为定值时,随着喷嘴长度增加,脉冲射流的速度快速增大,而脉冲的长度会大大减小。另外,在喷嘴内水柱的压力沿喷嘴出口方向显著增大,且喷嘴断面收缩越快或喷嘴越短,喷嘴内的压力上升就越快。因此,从减小喷嘴内压力,提高喷嘴强度角度出发,采用收缩较缓慢的长喷嘴为最佳。
Taking the cumulative nozzle used for the impulsive water cannon as the subject investigated, the mathematical model of its discharge is built. Meanwhile, the water-jet outlet speed and the static pressure are analyzed with SIMULINK software package in MATLAB. The result shows that for the exponent cumulative nozzle, the outlet speed is significantly increasing with the change rate of the nozzle outlet section increasing, When the rate is constant, the outlet speed increases quickly but the impulse time is shortened extremely with the nozzle length increasing. Besides, the static pressure inside the nozzle increases greatly along the outlet direction. And the more quickly the section shrinks or the shorter the nozzle is, the more quickly the inner pressure increases. Therefore, using slowly shrinking long nozzle is best from the aspects of reducing the inner pressure and enhancing the nozzle intensity.
出处
《矿山机械》
北大核心
2009年第13期1-4,共4页
Mining & Processing Equipment
基金
国家自然科学基金(50844033)
人事部资助项目(07202081)
