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低温下小尺度钝感炸药非理想爆轰实验研究 总被引:3,自引:1,他引:3
钝感炸药爆轰波法向速度Dn与当地曲率密切相关,为研究这种非理想行为,测量了-30 ℃下直径为10、12.5、15、30 mm的钝感炸药的定态爆轰速度和爆轰波形,并与24 ℃下的实验结果进行了比较。研究表明,低温下爆速随药柱直径的增加而增加;直径相同时,温度越高,爆轰波形越平坦;温度相同时,直径越大,爆轰波形越平坦;直径较小时,低温下的爆速小于常温下的爆速,相应的法向爆速与当地曲率的关系曲线Dn()位于常温下曲线的下方;直径较大时,低温下的爆速大于常温下的爆速,相应的Dn()关系曲线位于常温下曲线的上方。 相似文献
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Low Power-Consumption and High Response Frequency Thermo-Optic Variable Optical Attenuators Based on Silicon-on-Insulator Materials 总被引:1,自引:0,他引:1 下载免费PDF全文
A novel silicon-on-insulator thermo-optic variable optical attenuator with isolated grooves based on a multimode interference coupler principle is fabricated by the inductive coupled plasma etching technology. The maximum fibre-to-fibre insertion loss is lower than 2.2 dB, the dynamic attenuation range is from 0 to 30 dB in the wavelength range 1500-1600nm, and the maximum power consumption is only 140roW. The response frequency of the fabricated variable optical attenuator is about 30kHz. Compared to the variable optical attenuator without isolated grooves, the maximum power consumption decreases more than 220roW, and the response frequency rises are more than 20 kHz. 相似文献
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