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ISSN: 2667-1344

Influence of storage time before casting on viscosities and mechanical properties of AP/HTPB/Al solid composite propellants

Solid rocket motors can contain different quantity of solid composite propellant. In the Brazilian Aerospace Program, a considerable difference of the propellant masses used in each rocket motor is...

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Experimental Investigation on Flow Boiling Heat Transfer Characteristics of Endothermic Hydrocarbon Fuel and its Visualization at High-Temperature Conditions

The endothermic hydrocarbon fuel is used as a coolant to realize active cooling for the high-heat-flux components of air-breathing hypersonic vehicles. Because of its complex composition and severe...

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Phase transition and thermal expansion of molecular perovskite energetic crystal (C6N2H14)(NH4)(ClO4)3 (DAP-4)

Research on the structural responses to thermal stimuli for crystalline energetic materials is crucial to their practical applications. DAP-4 is a metal-free molecular perovskite high-energetic material...

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Recent progresses in material fabrication and modification by cold plasma technique

Carbon-based materials, metal oxides and metal nanoparticles have been widely used in propellants, explosives and pyrotechnics. Cold plasma technique has been developed for material fabrication and...

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Review on the regression rate-improvement techniques and mechanical performance of hybrid rocket fuels

Human spaceflight, space tourism, and the launch of microsatellites are all expected to grow in the future. In fact, with the recent increase of the satellite market, almost 1000 smallsats per year...

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Hybrid rocket propulsion technology for space transportation revisited - propellant solutions and challenges

This paper presents the status of developments worldwide regarding use of hybrid rocket motors for space transportation. Historical roots are presented and reasons for revisiting hybrid technology after...

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On the liquid layer instability process in hybrid rocket fuels

This work is focused on the study of the combustion mechanism of a class of fast-burning fuels, the so-called liquefying fuels, in hybrid rocket engines. The typical diffusive flame of this kind of...

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Development of 200 N-class throttleable hybrid rocket motor for lunar module application

In this study, ground tests of a lab-scale hybrid rocket motor were conducted to verify the feasibility of the hybrid propulsion system for lunar lander application. The primary goal is to assess the...

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The catalysis effects of acetylacetone complexes on polymer matrix of HTPB-based fuels

The slow regression rate caused by the difficulty of pyrolysis can not meet the practical application requirements of hydroxyl-terminated polybutadiene (HTPB)-based fuels in hybrid rocket propulsion....

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Experimental investigation of the axial oxidizer injectors geometry on a 1-kN paraffin-fueled hybrid rocket motor

The showerhead is the most common type of injector used in hybrid rocket motors due to its design and manufacture simplicity. The main drawback of the showerheads (SH) is the relatively low performance...

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Optimization design in single wagon-wheel fuel grain of hybrid rocket motor

The grain design of hybrid rocket motor is a design of proper fuel grain geometry and flow adjustment scheme based on the total impulse, thrust, chamber pressure, length and outer diameter of combustion...

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Flow of nitrous oxide in a venturi tube under conditions of a hybrid rocket motor

A Venturi tube is typically used as the flow control element of hybrid rocket motors (HRMs) for the precise control of the flow of a liquid oxidizer, e.g., nitrous oxide, which can efficiently realize...

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Experimental investigation of erosion rate of insulation materials using hybrid rockets

Thermal insulation is essential to protect the exposed surface from high-temperature and high heat flux situations. The selection of suitable insulation materials plays a crucial role in determining...

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Synthesis of novel heterobimetallic MOFs and its effect on thermolysis and laser ignition of TKX-50

•A heterobimetallic MOFs Ba4Pb4(CH3CO2)8[(CH6CO2)4Pb](CH3CO2)4 (PbBa-MOFs) was prepared.•A heterobimetallic MOFs Ba2Ni(CO2H)6(OH2)4 (NiBa-MOFs) was prepared.•The thermal decomposition characteristics...

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Hermetic Thermal Decomposition Behaviors and Specific Heat Capacity of 2,4,6-Triazido-1,3,5-Triazine (TAT)

•The hermetic thermal decomposition behavior of TAT is reported for the first time.•TAT exhibits a high thermal decomposition temperature and enthalpy of decomposition under high-pressure airtight ...

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Synthesis and characterization of two 1,2,4-oxadiazole-furazan-based nitrate ester compounds as potential energetic plasticizers

Two novel energetic compounds, 3-nitroxymethyl-5-(4-nitro-furazan-3-yl)-1,2,4-oxadiazole (4) and 3-nitroxymethyl-5-(4-azido-furazan-3-yl)-1,2,4-oxadiazole (5), were synthesized. Both of them were fully...

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Interaction Mechanism between Metal Hydrides and Energetic Compounds: an Extensive Literature Survey

The existing results show that the combustion heat, energy level and some other performance indices of system could be improved effectively, while opportune percentages of metal hydrides (MHs) are added...

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Theory of impact sensitivity revisited: mechanical-to-vibrational energy transfer phenomenon

•A new methodology for calculation of phonon-vibron couplings ζ is proposed.•A few drawbacks of previous approach are revealed and fixed in the revised method.•Two damping factors are introduced and...

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Structure enhancement of energetic materials: A theoretical study of the arylamines to arylpentazoles transformation

•Amine-to-pentazole transformation as a tool for molecular engineering of explosives is studied.•Quantification of the thermal stability is performed and an accurate descriptor is found.•A quantitative...

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Massive preparation and characteristics of submicron dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (TKX-50)

Image, graphical abstractSubmicron TKX-50 with average particle size of 120 nm was massively prepared by low-temperature ball milling technique. The prepared TKX-50 was spherical-like with no change...

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Comparing the impact safety between two HMX-based PBX with different binders

Binders play an important role in the safety of plastic bonded explosives (PBX). For the performance improvement of HMX-based explosive, the impact safety for the explosive using thermoplastic polyurethane...

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Mechanical properties and constitutive equation of pressed CL−20 based aluminized explosives

To investigate the mechanical properties and constitutive equation of pressed CL−20 based aluminized explosives, the stress-strain curves at different strain rates are obtained by quasi-static and dynamic...

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Energetic molecule specific polarizable force field

The development of accurate force fields of energetic molecules (EM) to predict their crystal structures has been aggressively pursued in the EM research community. In this study, a non-empirical polarizable...

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