Response function of ammonium perchlorate monopropellant

Kumar, Navneet; Vijay, Chaitanya; Ramakrishna, P. A.

doi:10.1016/j.combustflame.2020.08.011

Cited by 3 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The setup used in the present study to obtain extinguished propellant samples was similar to that used by Donde et al [25] and Nagendra et al [26]. Figure 1 shows the schematic of the experimental setup.…”

Section: Extinguished Propellantsmentioning

confidence: 99%

Binder melt: Composite propellants with RDX**

Nagendra,

Ramakrishna,

Sangtyani

et al. 2023

Propellants Explo Pyrotec

View full text Add to dashboard Cite

The binder melt on the surface of aluminized composite propellants with RDX has been quantified using experimental and computational approaches. A scanning electron microscope in conjunction with energy dispersive spectroscopy was used to analyze the surface of unburnt and extinguished propellant samples. Rapid depressurization technique was used to obtain the extinguished propellants. Five propellants were prepared, keeping the aluminum and binder fraction constant at 4 % and 16 %, respectively. The RDX fraction in the propellants was varied from 3 % to 12 %. It was found that the melt on the surface of the propellant increased from 36.7 % to 43.9 % when the RDX fraction was changed from 3 % to 12 % in the propellant. For propellants containing 3 % to 9 % RDX, a region of plateau burning was observed in the pressure range of 5–7 MPa, while propellants containing 12 % RDX showed plateau burning between 7–10 MPa.

show abstract

Section: Extinguished Propellantsmentioning

confidence: 99%

Binder melt: Composite propellants with RDX**

Nagendra,

Ramakrishna,

Sangtyani

et al. 2023

Propellants Explo Pyrotec

View full text Add to dashboard Cite

show abstract

“…Solid propellant charges are prone to burning or exploding under unexpected thermal stimulation, leading to catastrophic accidents [1,2]. Ammonium perchlorate (AP) is the most abundant ingredient in solid composite propellants and is widely used in solid propellant engines and aerospace boosters, where the AP content is over 70% [3,4]. AP has many advantages, including an ideal density, a favorable oxygen balance, and tailorable burn rates.…”

Section: Introductionmentioning

confidence: 99%

Evolution of the Micropore Structure of Ammonium Perchlorate during Low-Temperature Decomposition and Its Combustion Characteristics

et al. 2021

View full text Add to dashboard Cite

Ammonium perchlorate (AP) is a common oxidant in solid propellants, and its thermal decomposition characteristics at low temperatures (less than 240 °C) are key to the study of the thermal safety of propellants. Here, the low-temperature thermal decomposition characteristics of AP were investigated at 230 °C. The micromorphology of the low-temperature decomposition residues was characterized by scanning electron microscopy and 3D nano-computed tomography in order to analyse the evolution of microscopic pore structures, and the effect of the AP pore structure on combustion performance was then tested and analysed with a homemade closed bomb. The results demonstrate that the low-temperature decomposition of AP first occurs near the surface of the particles, simultaneously starting at multiple points and forming pores, and then gradually expands towards the interior until almost all of the pores connect with one other. Compared with ordinary AP, porous AP has a significantly improved combustion rate. When the ratio of porous AP to Al was 80:20, the peak pressure in the closed bomb was increased by 2.7 times; the rate of change in peak pressure increased 34 times, leading to a higher reaction speed and higher reaction intensity, and a typical explosion reaction occurred.

show abstract