Diameter Effect on Detonation Velocity of Ammonium Nitrate and Activated Carbon Mixtures

2007 ◽  
pp. 101-106
Author(s):  
Atsumi Miyake ◽  
Hidefumi Kobayashi ◽  
Hiroshi Echigoya ◽  
Katsumi Katoh ◽  
Shiro Kubota ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Diameter Effect

Detonation Velocity and Pressure of Ammonium Nitrate and Activated Carbon Mixtures

2007 ◽  
Vol 566 ◽  
pp. 107-112 ◽  
Author(s):  
Atsumi Miyake ◽  
Hiroshi Echigoya ◽  
Hidefumi Kobayashi ◽  
Katsumi Katoh ◽  
Shiro Kubota ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Peak Pressure ◽  
Stoichiometric Composition ◽  
Pressure Profile ◽  
Steel Tube ◽  
Detonation Properties ◽  
Detonation Velocity And Pressure ◽  
Predicted Values

To obtain a better understanding of detonation properties of ammonium nitrate (AN) and activated carbon (AC) mixtures, steel tube test was carried out for stoichiometric composition of powdered AN and AC mixtures and the detonation velocity and the pressure profile were measured. Based on the results obtained the relation between the detonation velocity and the peak pressure was discussed with the theoretically predicted values which were obtained by the thermohydrodynamic CHEETAH code with the BKWC equation of state. The measured detonation velocity and peak pressure were far below the theoretically predicted values and the non-ideal detonation behaviour was confirmed.

Diameter Effect on Detonation Velocity of Ammonium Nitrate and Activated Carbon Mixtures

2007 ◽  
Vol 566 ◽  
pp. 101-106 ◽  
Author(s):  
Atsumi Miyake ◽  
Hidefumi Kobayashi ◽  
Hiroshi Echigoya ◽  
Katsumi Katoh ◽  
Shiro Kubota ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Stoichiometric Composition ◽  
Steel Tube ◽  
Detonation Properties ◽  
Charge Diameter ◽  
Tube Test ◽  
Predicted Values ◽  
Good Agreement

To obtain a better understanding of detonation properties of ammonium nitrate (AN) and activated carbon (AC) mixtures, steel tube test with several diameters was carried out for various compositions of powdered AN and AC mixtures and the influence of the charge diameter on the detonation velocity was investigated. The results of test indicated that the detonation velocity increased with the increase of the charge diameter. The experimentally observed values were far below the theoretically predicted values made by the thermohydrodynamic CHEETAH code and they showed so-called non-ideal detonation. The extrapolated detonation velocity of stoichiometric composition to the infinite diameter showed a good agreement with the theoretical value.

Detonation Velocity and Pressure of Ammonium Nitrate and Activated Carbon Mixtures

2007 ◽  
pp. 107-112
Author(s):  
Atsumi Miyake ◽  
Hiroshi Echigoya ◽  
Hidefumi Kobayashi ◽  
Katsumi Katoh ◽  
Shiro Kubota ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Detonation Velocity And Pressure

NON-IDEAL DETONATION PROPERTIES OF AMMONIUM NITRATE AND ACTIVATED CARBON MIXTURES

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1319-1324 ◽  
Author(s):  
ATSUMI MIYAKE ◽  
HIROSHI ECHIGOYA ◽  
HIDEFUMI KOBAYASHI ◽  
TERUSHIGE OGAWA ◽  
KATSUMI KATOH ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Stoichiometric Composition ◽  
Steel Tube ◽  
Detonation Properties ◽  
Charge Diameter ◽  
Predicted Values ◽  
Good Agreement

To obtain a better understanding of detonation properties of ammonium nitrate (AN) and activated carbon (AC) mixtures, steel tube tests with several diameters were carried out for various compositions of powdered AN and AC mixtures and the influence of the charge diameter on the detonation velocity was investigated. The results showed that the detonation velocity increased with the increase of the charge diameter. The experimentally observed values were far below the theoretically predicted values made by the thermodynamic CHEETAH code and they showed so-called non-ideal detonation. The extrapolated detonation velocity of stoichiometric composition to the infinite diameter showed a good agreement with the theoretical value.

scholarly journals Study of non-conventional fuels for explosives mixes

2014 ◽  
Vol 67 (3) ◽  
pp. 297-302 ◽  
Author(s):  
Salatiel Assis Resende ◽  
Valdir Costa e Silva ◽  
Hernani Mota de Lima
Keyword(s):  
Ammonium Nitrate ◽  
Rice Straw ◽  
Detonation Velocity ◽  
Sugar Cane ◽  
Alternative Fuels ◽  
Low Cost ◽  
Poor Performance ◽  
Sugar Cane Bagasse ◽  
Fuel Oil ◽  
Corn Cob

The use of ammonium nitrate and fuel oil (ANFO) results in low cost blasting. Such costs may be further reduced by replacing fuel oil with alternative fuels such as biomass (biodiesel, rice straw, corn cob, sugar cane bagasse) and tires residue. This paper investigates the use of other fuels instead of fuel oil by measuring the detonation velocity (VOD) and verifying the importance of these fuels in an explosive mixture. Except for biodiesel, all the tests conducted for the mixture of ammonium nitrate and alternative fuels showed poor performance when compared with ANFO. The achieved percentage of detonation velocity (VOD) of the mixtures in relation to the ANFO were 55.4% for ammonium nitrate + rice straw, 64.9% for ammonium nitrate + corn cob, 70.1% for ammonium nitrate + sugar cane bagasse, 74.4% for ammonium nitrate + tires residue and 93.7% for ammonium nitrate + biodiesel. This study indicates that the methodology proposed can be applied as a reference for determination and preparation of explosive mixtures of fuel and oxidizing agents since in all the tests conducted the detonation of the charges occurred.

COMBUSTION AND IGNITION PROPERTIES OF AMMONIUM NITRATE AND ACTIVATED CARBON MIXTURES

2009 ◽  
Vol 8 (5) ◽  
pp. 411-419 ◽  
Author(s):  
Atsumi Miyake ◽  
Hidefumi Kobayashi ◽  
Hiroshi Echigoya ◽  
Terushige Ogawa
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate

Detonation characteristics of ammonium nitrate and activated carbon mixtures

2007 ◽  
Vol 20 (4-6) ◽  
pp. 584-588 ◽  
Author(s):  
Atsumi Miyake ◽  
Hidefumi Kobayashi ◽  
Hiroshi Echigoya ◽  
Shiro Kubota ◽  
Yuji Wada ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Nitrate ◽  
Detonation Characteristics

Pressure Measurement of Non-Ideal Detonation in Ammonium Nitrate Based High Energetic Material

2014 ◽  
Vol 566 ◽  
pp. 385-390 ◽  
Author(s):  
Yuuki Yamamoto ◽  
Shiro Kubota ◽  
Tei Saburi ◽  
Yuji Wada ◽  
Atsumi Miyake
Keyword(s):  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Peak Pressure ◽  
Energetic Material ◽  
Pressure Gauge ◽  
Steel Tube ◽  
Accurate Information ◽  
Detonation Pressure ◽  
Tube Test ◽  
Detonation Velocity And Pressure

In order to know accurate information on the non-ideal detonation pressure, steel tube test was carried out on ammonium nitrate (AN) and activated carbon (AC) mixtures. In this test, detonation velocity and pressure were measured simultaneously by varying thickness of PMMA placed between AN/AC and pressure gauge. The length and the diameter of the steel tube were 350 mm and 35.5 mm. The results showed that shock pressure attenuation in PMMA was not observed for this experimental condition (PMMA gap; 3-5 mm). The averaged measured peak pressure and detonation velocity were 3.4 GPa and 3.2 km/s.

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