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[1]Tamer Elshenawy,Ahmed Elbeih,Qing Ming Li,等.Investigation of a New Formula for Gurney Velocity Estimation[J].火炸药学报,2018,41(4):340-344.[doi:10.14077/j.issn.1007-7812.2018.04.004]
 Tamer Elshenawy,Ahmed Elbeih,Qing Ming Li,et al.Investigation of a New Formula for Gurney Velocity Estimation[J].,2018,41(4):340-344.[doi:10.14077/j.issn.1007-7812.2018.04.004]
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Investigation of a New Formula for Gurney Velocity Estimation()
     
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《火炸药学报》[ISSN:1007-7812/CN:61-1310/TJ]

卷:
41卷
期数:
2018年第4期
页码:
340-344
栏目:
出版日期:
2018-08-23

文章信息/Info

Title:
Investigation of a New Formula for Gurney Velocity Estimation
作者:
Tamer Elshenawy Ahmed Elbeih Qing Ming Li Gamal M. Abdo
1. Technical Research Centre, Cairo, Egypt;
2. Military Technical College, Kobry Elkobbah, Cairo, Egypt;
3. The University of Manchester, School of Mechanical Aerospace and Civil Engineering, Manchester, UK;
4. Mechanical Engineering Department, Modern Academy for Engineering and Technology, Cairo, Egypt
Author(s):
Tamer Elshenawy Ahmed Elbeih Qing Ming Li Gamal M. Abdo
1. Technical Research Centre, Cairo, Egypt;
2. Military Technical College, Kobry Elkobbah, Cairo, Egypt;
3. The University of Manchester, School of Mechanical Aerospace and Civil Engineering, Manchester, UK;
4. Mechanical Engineering Department, Modern Academy for Engineering and Technology, Cairo, Egypt
关键词:
Gurney velocitymetal accelerationexplosivesjet tip velocity
Keywords:
Gurney velocitymetal accelerationexplosivesjet tip velocity
分类号:
TH55;O65
DOI:
10.14077/j.issn.1007-7812.2018.04.004
文献标志码:
-
摘要:
The formula for the analytical calculations of the shaped charge jetting parameters exhibit an explicit dependence upon the Gurney velocity of an explosive material. Many attempts have been done to approximate the characteristic constant √2E and to make its use more efficient. It is shown herein that the characteristic Gurney velocity parameter depends on the ratio of the Chapman Jouguet-pressure to explosive impulse ratio by the formula:√2E=0.2415(PCJ/ISP ρ0)-970.76, where PCJ is the Chapman Jouguet pressure (Pa), ISP is the specific impulse of the explosive used as a monopropellant (N·s/kg) and ρo is the explosive density(kg/m3). The proposed empirical formula was found to be reasonable and quite accurate approximation that can be implemented over a wide range of explosives, where the maximum deviation between the measured and the calculated Gurney velocities was nearly 6%. Besides, the proposed approach has been used analytically to calculate the jet tip velocity of a small caliber shaped charge, which is measured experimentally. The difference between the measured and the calculated jet tip velocity was only 1.6%.
Abstract:
The formula for the analytical calculations of the shaped charge jetting parameters exhibit an explicit dependence upon the Gurney velocity of an explosive material. Many attempts have been done to approximate the characteristic constant √2E and to make its use more efficient. It is shown herein that the characteristic Gurney velocity parameter depends on the ratio of the Chapman Jouguet-pressure to explosive impulse ratio by the formula:√2E=0.2415(PCJ/ISP ρ0)-970.76, where PCJ is the Chapman Jouguet pressure (Pa), ISP is the specific impulse of the explosive used as a monopropellant (N·s/kg) and ρo is the explosive density(kg/m3). The proposed empirical formula was found to be reasonable and quite accurate approximation that can be implemented over a wide range of explosives, where the maximum deviation between the measured and the calculated Gurney velocities was nearly 6%. Besides, the proposed approach has been used analytically to calculate the jet tip velocity of a small caliber shaped charge, which is measured experimentally. The difference between the measured and the calculated jet tip velocity was only 1.6%.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-04-17;改回日期:2018-05-28。
作者简介:Tamer Elshenawy(1975-),male,Ph.D.,research fields:weapons,ammunition,explosives as well as rocket propulsion.E-mail:tamershenawy@yahoo.com
更新日期/Last Update: 1900-01-01