炸药周围水层对空气冲击波反射超压影响的实验研究

通过在容器内用适量水包裹炸药进行水消减冲击波的爆炸实验,研究水与炸药的质量比值、比例距离对冲击波反射超压的影响,并对水消减冲击波的规律进行了分析。研究结果表明:相比于无水爆炸,置水后冲击波反射超压随比例距离增大呈先增后减趋势,在比例距离为0.255 m/kg13时,置水后的反射超压峰值均大于无水时的结果,且随着水药比的增大而增大,水药比为6时的压力峰值可达无水时的8倍;当比例距离增大至1.21 m/kg13时,水可以显著降低反射超压峰值,相比无水爆炸降幅可达60%.

封闭空间内水层对爆炸载荷特性影响的实验研究

采用球对称爆炸装置,在球形容器中开展了炸药与水之间有空气间隙(层)的置水爆炸实验,根据实测的激波走时、压力和冲量等数据,对容器内置水爆炸载荷形成机制进行了分析,并探讨了爆炸过程中空气间隙与爆轰产物和水之间的作用机理。结果表明:置水爆炸时容器内壁受到的载荷主要包括幅值较低的前导空气冲击波和雾状水滴的持续撞击作用,有空气间隙的置水爆炸可以降低反射压力、准静态压力和冲量,空气间隙有利于水对爆炸载荷的消减效果。

Coordinated control strategy for wind power accommodation based on electric heat storage and pumped storage

To solve the severe problem of wind power curtailment in the winter heating period caused by ＂power determined by heat＂ operation constraint of cogeneration units, this paper analyzes thermoelectric load, wind power output distribution and fluctuation characteristics at different time scales, and finally proposes a two level coordinated control strategy based on electric heat storage and pumped storage. The optimization target of the first level coordinated control is the lowest operation cost and the largest wind power utilization rate. Based on prediction of thermoelectric load and wind power, the operation economy of the system and wind power accommodation level are improved with the cooperation of electric heat storage and pumped storage in regulation capacity. The second level coordinated control stabilizes wind power real time fluctuations by cooperating electric heat storage and pumped storage in control speed. The example results of actual wind farms in Jiuquan, Gansu verifies the feasibility and effectiveness of the proposed coordinated control strategy.