Results 31 to 40 of about 1,005 (167)

Multilayer coating of spherical gun propellants via fluidized bed techniques: Enhanced combustion performance and storage stability

Energetic Materials Frontiers
To address key challenges of conventional spherical gun propellants, including inconsistent energy release, harmful gas emissions, and long-term storage instability, this study utilizes fluidized bed technology combined with composite energetic coating ...
Ning Zhou, Wen-hao Fan, Fu-qiang Du, Shi-ying Li, Chun-lin Chen, Ya-jun Ding   +5 more
doaj   +1 more source

Characterization of CL-20/HMX cocrystallization and its effects on GAP-based propellants during thermal aging process

Polymer Testing
The incorporation of HMX and CL-20 as component particles can greatly improve the energy efficiency of composite propellants. Nevertheless, the occurrence of cocrystallization arises when HMX and CL-20 exists together.
Jiangtao Wang, Guanglong Zhang, Xiangyang Liu, Ningfei Wang   +3 more
doaj   +1 more source

Possibility of aluminium/magnesium exchange in composite rocket propellants [PDF]

Scientific Technical Review, 2018
Composite solid propellants based on ammonium perchlorate/hydroxyterminated polybutadiene/isophorone dyisocyanate including two metal components: aluminium and magnesium with different contents have been represented in this paper.
Rodić Vesna, Bogosavljević Marica, Brzić Saša, Fidanovski Bojana   +3 more
doaj  

Experimental Studies on Composite Propellants

The Journal of the Society of Chemical Industry, Japan, 1960
酸化剤に過塩素酸アンモン,燃料結合剤にポリエステル樹脂またはエポキシーポリスルフィド樹脂を用いたコンポジット推進薬の物性および燃焼特性を実験的に検討した。この結果次の点を明らかにした。すなわち燃料結合剤として用いる樹脂の性質に極端な差がないかぎり,成形推進薬の物性は特に差は認められない。また燃焼特性に関しては,これらの推進薬の圧力指数はいずれも小さく,したがって燃焼の安定性を期し得るが,面積比等しい時の比推力を考える時,エポキシ-ポリスルフィド系推進薬の方がポリエステル系推進薬よりすぐれているといえよう。
Ken-ichi Akimitsu, Tsutomu Kakutani, Ikuo Harada, Takao Yokoyoma   +3 more
openaire   +2 more sources

A Reliable Method for Predicting the Specific Impulse of Chemical Propellants

Journal of Aerospace Technology and Management, 2018
The specific impulse (Isp) is an important performance parameter that describes energy efficiency of propellant combustion and is intimately related to the rocket engine thrust.
Dany Frem
doaj  

Cast composite solid propellants with different combustion stabilizers [PDF]

Scientific Technical Review, 2015
The effect of four different compounds as the combustion stabilizers of composite solid propellants based on the AP/HTPB/IPDI has been presented in this paper.
Rodić Vesna, Dimić Mirjana, Brzić Saša, Gligorijević Nikola   +3 more
doaj  

Combustion performance studies of aluminum and boron based composite solid propellants in sub-atmospheric pressure regimes

Propulsion and Power Research, 2019
The aim of present study is to investigate the burning rate, ignition delay, and flame characteristics of ammonium perchlorate (AP)-hydroxyl terminated poly-butadiene (HTPB) [AP/HTPB] based composite propellants (CSP's) in sub-atmospheric pressure ...
Pratim Kumar, Mayank Varshney, Aniket Manash   +2 more
doaj   +1 more source

Encapsulation of Oxidizers: Efficient Method by Spout-fluid Bed

Journal of Aerospace Technology and Management, 2020
In composite solid propellants, the oxidizer in the form of particles is embedded in a polymeric matrix. In general, these oxidizers consist in inorganic salts that are hygroscopic, chemically incompatible or sensitive to friction or impact, so that ...
Jessica de Oliveira Silva, Josiane Ribeiro Campos Silva, Lucas Barros de Oliveira, Marcio Yuji Nagamachi, Luiz Fernando de Araujo Ferrão   +4 more
doaj  

Study on the Mechanical Properties of Solid Composite Propellant Used as a Gas Generator

Journal of Aerospace Technology and Management, 2020
A gas generating propellants are used as initiators of liquid rocket propellants turbopumps and have as desired characteristic a high-volume production of low-temperature gas.
Lia Junqueira Pimont, Paula Cristina Gomes Fernandes, Luiz Fernando de Araujo Ferrão, Marcio Yuji Nagamachi, Kamila Pereira Cardoso   +4 more
doaj  

Direct ink writing of ammonium perchlorate propellants for solid rockets using a dual-cure approach

Materials & Design
This work investigates the fabrication of ammonium perchlorate composite propellants using a dual-cure (ultraviolet and thermally curable) binder via direct ink writing and compares their performance with conventionally cast counterparts.
Farideddin Bazzal, Cayden Smedley, Jack Gradle, Michael J. Bortner, Christopher B. Williams, Gregory Young   +5 more
doaj   +1 more source