《Table 2Results of shock energy, gas bubble and total energy》

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《CL-20基含铝炸药水下爆炸实验研究与数值模拟（英文）》

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According to the pressure histories of shock wave in Fig.3 and Eqs.（1）-（8）[26]，the shock energy，gas energy and total energy of the explosives can be calculated，as shown in Table 2.It is obvious that addition of aluminum powder is of advantage to increase the underwater explosion energy such as shock energy，gas bubble and total energy.The time constantθof CL-20-based aluminized explosive is larger than that of CL-20-based explosive.The bubble pulse period increases by about 7.4%.The shock wave energy of the CL-20-based aluminized explosive is 1.31 MJ·kg-1，and it is 1.16 times larger than CL-20-based explosive.The bubble energy of the CL-20-based aluminized explosive is 33.3%higher than CL-20-based explosive.These are signs that aluminum powder can greatly improve the bubble energy.The total energy measured at measuring point of CL-20-based aluminized explosive increases by about27.4%.The total underwater explosion energy per mass unit of an explosive etapproaches heat of detonation of the explosives[26].The heat of detonation of the CL-20-based explosive is 5.95 MJ·kg-1[39].The total underwater explosion energy of CL-20-based explosive is 5.74 MJ·kg-1，and it is 1.4 times larger than TNT（4.09 MJ·kg-1）in underwater explosion energy[40].Compared with the heat of detonation of the CL-20-based explosive，the error is about 3.5%.The total underwater explosion energy etincreases by 22.6%with addition of aluminum powder in CL-20.The total underwater explosion energy of CL-20-based aluminized explosive is 1.7 times larger than TNT.But beyond that，the peak pressure in primary shock wave decreases slightly for CL-20-based aluminized explosive.So the addition of aluminum powder can attain the purpose to increase time constant，bubble pulse period and explosion energy.Because aluminum can react with explosion products to give out a lot of heat and gas，decay of pressure slows down and shock energy and total energy increase as well as gas bubble and pulsation period prolongs.