scholarly journals Aging Effects on the Burning Rates of Composite Solid Propellants with Nano-Additives

2019 ◽  
Vol 35 (2) ◽  
pp. 342-351 ◽  
Author(s):  
James C. Thomas ◽  
Thomas E. Sammet ◽  
Catherine A. M. Dillier ◽  
Andrew R. Demko ◽  
Felix A. Rodriguez ◽  
...  
Keyword(s):  
Solid Propellants ◽  
Aging Effects ◽  
Composite Solid Propellants ◽  
Burning Rates ◽  
Nano Additives ◽  
Composite Solid

Nano Additives and Plateau Burning Rates of Ammonium-Perchlorate-Based Composite Solid Propellants

2009 ◽  
Vol 25 (5) ◽  
pp. 1068-1078 ◽  
Author(s):  
Matthew A. Stephens ◽  
Eric L. Petersen ◽  
David L. Reid ◽  
Rodolphe Carro ◽  
Sudipta Seal
Keyword(s):  
Ammonium Perchlorate ◽  
Solid Propellants ◽  
Composite Solid Propellants ◽  
Burning Rates ◽  
Nano Additives ◽  
Composite Solid

Effects of Aging on the Burning Rates of Composite Solid Propellants with and without Nano-Sized Additives

2018 ◽  
Author(s):  
James C. Thomas ◽  
Thomas Sammet ◽  
Catherine A. Dillier ◽  
Andrew R. Demko ◽  
Felix Rodriguez ◽  
...  
Keyword(s):  
Solid Propellants ◽  
Composite Solid Propellants ◽  
Burning Rates ◽  
Effects Of Aging ◽  
Composite Solid

scholarly journals Combustion Characteristics of Nanoaluminium-Based Composite Solid Propellants: An Overview

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Kandasamy Jayaraman ◽  
Ponnurengam Malliappan Sivakumar ◽  
Ali Zarrabi ◽  
R. Sivakumar ◽  
S. Jeyakumar
Keyword(s):  
Burning Rate ◽  
Solid Loading ◽  
Solid Propellants ◽  
Nanosized Powders ◽  
Near Surface ◽  
Initial Modulus ◽  
Nanosized Catalysts ◽  
Composite Solid Propellants ◽  
Burning Rates ◽  
Composite Solid

The nanosized powders have gained attention to produce materials exhibiting novel properties and for developing advanced technologies as well. Nanosized materials exhibit substantially favourable qualities such as improved catalytic activity, augmentation in reactivity, and reduction in melting temperature. Several researchers have pointed out the influence of ultrafine aluminium (∼100 nm) and nanoaluminium (<100 nm) on burning rates of the composite solid propellants comprising AP as the oxidizer. The inclusion of ultrafine aluminium augments the burning rate of the composite propellants by means of aluminium particle’s ignition through the leading edge flames (LEFs) anchoring above the interfaces of coarse AP/binder and the binder/fine AP matrix flames as well. The sandwiches containing 15% of nanoaluminium solid loading in the binder lamina exhibit the burning rate increment of about 20–30%. It was noticed that the burning rate increment with nanoaluminium is around 1.6–2 times with respect to the propellant compositions without aluminium for various pressure ranges and also for different micron-sized aluminium particles in the composition. The addition of nano-Al in the composite propellants washes out the plateaus in burning rate trends that are perceived from non-Al and microaluminized propellants; however, the burning rates of nanoaluminized propellants demonstrate low-pressure exponents at the higher pressure level. The contribution of catalysts towards the burning rate in the nanoaluminized propellants is reduced and is apparent only with nanosized catalysts. The near-surface nanoaluminium ignition and diffusion-limited nano-Al particle combustion contribute heat to the propellant-regressing surface that dominates the burning rate. Quench-collected nanoaluminized propellant residues display notable agglomeration, although a minor percentage of the agglomerates are in the 1–3 µm range; however, these are within 5 µm in size. Percentage of elongation and initial modulus of the propellant are decreased when the coarse AP particles are replaced by aluminium in the propellant composition.

Combustion Characteristics of Composite Solid Propellants Containing Different Coated Aluminum Nanopowders

2014 ◽  
Vol 924 ◽  
pp. 200-211 ◽  
Author(s):  
Er Gang Yao ◽  
Feng Qi Zhao ◽  
Si Yu Xu ◽  
Rong Zu Hu ◽  
Hui Xiang Xu ◽  
...  
Keyword(s):  
Burning Rate ◽  
Flame Temperature ◽  
Burning Surface ◽  
Combustion Characteristics ◽  
Solid Propellants ◽  
Nickel Acetylacetonate ◽  
Aluminum Nanopowder ◽  
Composite Solid Propellants ◽  
Burning Rates ◽  
Composite Solid

Aluminum nanopowders coated with oleic acid (nmAl+OA), perfluorotetradecanoic acid (nmAl+PA) and nickel acetylacetonate (nmAl+NA) were prepared. The combustion characteristics of hydroxyl terminated polybutadiene (HTPB) composite solid propellants containing different coated aluminum nanpowders were investigated. The result shows that the burning rate of the propellant sample containing nmAl+NA is the highest at different pressure, the maximum burning rate is up to 26.13 mm·s-1at 15 MPa. The burning rates of propellant samples containing nmAl+OA and nmAl+PA are almost the same at different pressures, and higher than the propellant samples containing untreated aluminum nanopowders only at the pressure range of 10 ~ 15 MPa. The flame brightness of different propellants under different pressure is not the same. The flame brightness is increased with the pressure increasing. The flame center zone brightness of the propellant containing nmAl+PA and nmAl+NA is brighter under 4 MPa, and the brightness of nmAl+NA is the brightest. The surface coating of aluminum nanopowder has little effect on the combustion flame temperature of solid propellant. The burning surface temperature increases with the pressure increasing.

scholarly journals Cu–Co–O nano-catalysts as a burn rate modifier for composite solid propellants

2016 ◽  
Vol 12 (4) ◽  
pp. 297-304 ◽  
Author(s):  
D. Chaitanya Kumar Rao ◽  
Narendra Yadav ◽  
Puran Chandra Joshi
Keyword(s):  
Solid Propellants ◽  
Composite Solid Propellants ◽  
Burn Rate Modifier ◽  
Nano Catalysts ◽  
Burn Rate ◽  
Composite Solid
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