scholarly journals EXPRESS METHOD FOR CALCULATING THE SPECIFIC HEAT OF EXPLOSIVE TRANSFORMATION OF CHNO CONDENSED EXPLOSIVES

Author(s):  
А.А. Трубников ◽  
В.В. Гордеев ◽  
А.Г. Вакутин

Разработан экспресс-метод расчета теплоты взрыва СаHbNcOdконденсированных взрывчатых веществ с различным кислородным балансом от резко отрицательного до положительного. Предложенный метод использует минимальный набор входных данных, состоящих из элементного состава, плотности энтальпий образований исходного взрывчатого вещества и его продуктов детонации. Расчет теплоты взрыва основывается на корреляционной связи между минимальной и максимальной теплотами взрыва с плотностью высокоэнергетического соединения. В статье подробно приведены реакции разложения взрывчатых веществ для случаев с минимальной и максимальными теплотами взрыва. Проведены расчеты теплоты взрыва по новому способу и методу Пепекина по представленной в статье базы взрывчатых веществ, а также приведены результаты сравнения, которые показали большую точность (в 2,3 раза) предложенного метода. An express method has been developed for calculating the explosion heat of cahbncod condensed explosives with different oxygen balance from sharply negative to positive. The proposed method uses a minimal set of input data consisting of the elemental composition, enthalpy density of the formations of the initial explosive and its detonation products. The calculation of the heat of explosion is based on the correlation between the minimum and maximum heat of explosion with the density of a high-energy compound. The article describes in detail the decomposition reactions of explosives for cases with minimum and maximum explosion heats. Calculations of the heat of explosion according to the new method and the pepekin method are carried out according to the explosives database presented in the article, and comparison results are also presented, which showed a better accuracy (2.3 times) of the proposed method.

2009 ◽  
Vol 161 (2-3) ◽  
pp. 714-717 ◽  
Author(s):  
H. Muthurajan ◽  
R. Sivabalan ◽  
N. Pon Saravanan ◽  
M.B. Talawar

1978 ◽  
Vol 19 (3) ◽  
pp. 315-318 ◽  
Author(s):  
P. I. Zubkov ◽  
L. A. Luk'yanchikov ◽  
Yu. V. Ryabinin

1965 ◽  
Vol 43 (12) ◽  
pp. 3129-3132 ◽  
Author(s):  
J. W. S. Jamieson ◽  
R. A. Lamontagne ◽  
Barbara A. Pattern ◽  
G. R. Brown

Much higher heats of solution than have previously been observed for hydrates of zinc sulfate have been measured for various new vacuum dehydration products. It is suggested that the maximum heat of transition to normal crystalline form of 82.8 cal/g, 23.8 kcal per mole of heptahydrate, or 8.3 × 103 cm−1 is a satisfactory measure of the ligand field splitting energy for the hexaaquozinc(II) ion.


Author(s):  
Brian T. Fisher ◽  
Jim S. Cowart ◽  
Michael R. Weismiller ◽  
Zachary J. Huba ◽  
Albert Epshteyn

Energetic nanoparticles are promising fuel additives due to their high specific surface area, high energy content, and catalytic capability. Novel amorphous reactive mixed-metal nanopowders (RMNPs) containing Ti, Al, and B, synthesized via a sonochemical reaction, have been developed at the Naval Research Laboratory. These materials have higher energy content than commercial nano-aluminum (nano-Al), making them potentially useful as energy-boosting fuel components. This work examines combustion of RMNPs in a single-cylinder diesel engine (Yanmar L48V). Fuel formulations included up to 4 wt % RMNPs suspended in JP-5, and equivalent nano-Al suspensions for comparison. Although the effects were small, both nano-Al and RMNPs resulted in shorter ignition delays, retarded peak pressure locations, decreased maximum heat release rates, and increased burn durations. A similar but larger engine (Yanmar L100V) was used to examine fuel consumption and emissions for a suspension of 8 wt % RMNPs in JP-5 (and 8 wt % nano-Al for comparison). The engine was operated as a genset under constant load with nominal gross indicated mean effective pressure of 6.5 bar. Unfortunately, the RMNP suspension led to deposits on the injector tip around the orifices, while nano-Al suspensions led to clogging in the fuel reservoir and subsequent engine stall. Nevertheless, fuel consumption rate was 17% lower for the nano-Al suspension compared to baseline JP-5 for the time period prior to stall, which demonstrates the potential value of reactive metal powder additives in boosting volumetric energy density of hydrocarbon fuels.


1982 ◽  
Vol 18 (1) ◽  
pp. 98-101 ◽  
Author(s):  
V. M. Kuznetsov ◽  
N. M. Kuznetsov ◽  
A. F. Shatsukevich

2014 ◽  
Vol 50 (6) ◽  
pp. 711-715
Author(s):  
V. Yu. Davydov ◽  
A. S. Gubin ◽  
F. S. Zagryadtskii ◽  
I. V. Potapov

2013 ◽  
Vol 24 (5) ◽  
pp. 1579-1590 ◽  
Author(s):  
Qiong Wu ◽  
Yong Pan ◽  
Xuelan Xia ◽  
Yuling Shao ◽  
Weihua Zhu ◽  
...  

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