Modeling of Deflagration-to-Shock-to-Detonation Transition (DSDT) in Porous High Energy Solid Propellants and Explosives.

The paper presents the results of thermodynamic calculations of the effect of pure boron additives on combustion characteristics of high-energy materials (HEM) based on ammonium perchlorate, ammonium nitrate, active fuel-binder, and powders of aluminum Al, titanium Ti, magnesium Mg, and boron B. The combustion parameters and the equilibrium composition of condensed combustion products (CCPs) of HEM model compositions were obtained with thermodynamic calculation program “Terra.” The compositions of solid propellants with different ratios of metals (Al/B, Ti/B, Mg/B, and Al/Mg/B) were considered. The combustion temperature Tad in a combustion chamber, the vacuum specific impulse J at the nozzle exit, and the mass fraction ma of the CCPs for HEMs were determined.

Download Full-text

Transient Combustion of Solid Propellants: An Important Aspect of Deflagration-to-Detonation Transition

Nonsteady Burning and Combustion Stability of Solid Propellants ◽

10.2514/5.9781600866159.0441.0464 ◽

1992 ◽

pp. 441-464

Keyword(s):

Solid Propellants ◽

Transient Combustion ◽

Deflagration To Detonation Transition ◽

Detonation Transition

Download Full-text

Damage of a High-Energy Solid Propellant and Its Deflagration-to-Detonation Transition

Propellants Explosives Pyrotechnics ◽

10.1002/prep.200390005 ◽

2003 ◽

Vol 28 (1) ◽

pp. 37-42 ◽

Cited By ~ 20

Author(s):

Taihua Zhang ◽

Yilong L. Bai ◽

Shiying Y. Wang ◽

Peide D. Liu

Keyword(s):

Solid Propellant ◽

High Energy ◽

Deflagration To Detonation Transition ◽

Detonation Transition

Download Full-text

Ignition and combustion of high-energy materials containing aluminum, boron and aluminum diboride

MATEC Web of Conferences ◽

10.1051/matecconf/201819401055 ◽

2018 ◽

Vol 194 ◽

pp. 01055

Author(s):

Alexander Korotkikh ◽

Ivan Sorokin ◽

Ekaterina Selikhova

Keyword(s):

Burning Rate ◽

Ignition Delay ◽

Delay Time ◽

Solid Propellant ◽

Ignition Delay Time ◽

High Energy ◽

Solid Propellants ◽

Amorphous Boron ◽

Aluminum Diboride ◽

Ignition And Combustion

Boron and its compounds are among the most promising metal fuel components to be used in solid propellants for solid fuel rocket engine and ramjet engine. Papers studying boron oxidation mostly focus on two areas: oxidation of single particles and powders of boron, as well as boron-containing composite solid propellants. This paper presents the results of an experimental study of the ignition and combustion of the high-energy material samples based on ammonium perchlorate, ammonium nitrate, and an energetic combustible binder. Powders of aluminum, amorphous boron and aluminum diboride, obtained by the SHS method, were used as the metallic fuels. It was found that the use of aluminum diboride in the solid propellant composition makes it possible to reduce the ignition delay time by 1.7–2.2 times and significantly increase the burning rate of the sample (by 4.8 times) as compared to the solid propellant containing aluminum powder. The use of amorphous boron in the solid propellant composition leads to a decrease in the ignition delay time of the sample by a factor of 2.2–2.8 due to high chemical activity and a difference in the oxidation mechanism of boron particles. The burning rate of this sample does not increase significantly.

Download Full-text

THE BURNING RATE OF HIGH-ENERGY MATERIALS CONTAINING METAL FUELS BASED ON AL AND B

NONEQUILIBRIUM PROCESSES: RECENT ACCOMPLISHMENTS ◽

10.30826/nepcap9a-32 ◽

2020 ◽

Author(s):

A. Korotkikh ◽

◽

I. Sorokin ◽

E. Selikhova ◽

V. Arkhipov ◽

...

Keyword(s):

Ammonium Nitrate ◽

Specific Energy ◽

High Energy ◽

Solid Propellants ◽

Amorphous Boron ◽

Energy Materials ◽

Energy Characteristics ◽

High Energy Materials ◽

Metal Borides ◽

Active Fuel Binder

An effective method of increasing the energy characteristics of high-energy materials (HEMs) is the use of boron and metal borides powders, which have high values of specific energy released during oxidation and combustion. This study investigates powders of amorphous boron and aluminum borides, which are used in compositions of solid propellants based on ammonium perchlorate, ammonium nitrate, and active fuel-binder.

Download Full-text