Properties of the surface layer and combustion behavior of metallized solid propellants

Babuk, V. A.

doi:10.1007/s10573-009-0059-8

Cited by 19 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SL of these propellants consists of the initial metal particles fastened among themselves. The results of paper [38] allow to de¦ne how various decisions on propellant composition (active inactive binder, aluminum nanoaluminum, oxidizers: AP, ADN, ammonium nitrate (AN), HMX) in §uence on the accessory of propellants to one or another class and the law of their burning.…”

Section: Solid and Hybryd Propulsionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis and synthesis of solutions for the agglomeration process modeling

Babuk

Dolotkazin

Nizyaev

2013

Progress in Propulsion Physics

Self Cite

View full text Add to dashboard Cite

The present work is devoted development of model of agglomerating process for propellants based on ammonium perchlorate (AP), ammonium dinitramide (ADN), HMX, inactive binder, and nanoaluminum. Generalization of experimental data, development of physical picture of agglomeration for listed propellants, development and analysis of mathematical models are carried out. Synthesis of models of various phenomena taking place at agglomeration implementation allows predicting of size and quantity, chemical composition, structure of forming agglomerates and its fraction in set of condensed combustion products. It became possible in many respects due to development of new model of agglomerating particle evolution on the surface of burning propellant. Obtained results correspond to available experimental data. It is supposed that analogical method based on analysis of mathematical models of particular phenomena and their synthesis will allow implementing of the agglomerating process modeling for other types of metalized solid propellants.

show abstract

Section: Solid and Hybryd Propulsionmentioning

confidence: 99%

“…Occurrence SL at propellant burning is possible only at formation of a carbon skeleton [36,38]. Consequently, the possibility of the carbon skeleton formation and SL is connected with conditions of the binder decomposition ¡ ¦rst of all, with oxidizing components concentration.…”

Section: Formation Of the Skeleton Layermentioning

confidence: 99%

Analysis and synthesis of solutions for the agglomeration process modeling

Babuk

Dolotkazin

Nizyaev

2013

Progress in Propulsion Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The fraction of the metal participating in aggregation/ agglomeration processes depends on the propellant properties [26][27][28]. The first stage of metal burning by agglomeration is carried out within the skeleton layer whose features determine [29] burning properties. In either case (burning of metal with or without agglomeration), Al particles feature a spacewise distributed burning overlapping the underlying unmetallized flame structure but extending much beyond the gas-phase flame thickness, and thus little affecting steady burning rates.…”

Section: B Flame Structure Of Ap-based Composite Propellantsmentioning

confidence: 99%

Microstructure Effects in Aluminized Solid Rocket Propellants

DeLuca

Galfetti

Colombo

et al. 2010

Journal of Propulsion and Power

Self Cite

View full text Add to dashboard Cite

Experiments concerning the ballistic characterization of several nanoaluminum (nAl) powders are reported. Most studies were performed with laboratory composite solid rocket propellants based on ammonium perchlorate as oxidizer and hydroxyl-terminated polybutadiene as inert binder. The ultimate objective is to understand the flame structure of differently metallized formulations and improve their specific impulse efficiency by mitigating the twophase losses. Ballistic results confirm, for increasing nAl mass fraction or decreasing nAl size, higher steady burning rates with essentially the same pressure sensitivity and reduced average size of condensed combustion products. However, aggregation and agglomeration phenomena near the burning surface appear noticeably different for microaluminum ( Al) and nAl powders. By contrasting the associated flame structures, a particle-laden flame zone with a sensibly reduced particle size is disclosed in the case of nAl. Propellant microstructure is considered the main controlling factor. A way to predict the incipient agglomerate size for Al propellants is proposed and verified by testing several additional ammonium perchlorate/hydroxyl-terminated polybutadiene/aluminum formulations of industrial manufacture

show abstract

“…Numerical and experimental investigations of ignition processes for solid [1][2][3][4] and liquid [5][6][7][8] condensed substances, polymer materials [9][10][11], and gas-vapor mixtures [12][13][14] by the energy source with limited power consumption (metallic and nonmetallic particles, wires, cores, concentrate radiation flows, etc.) were held in recent years.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Research of Heat and Mass Transfer at the Heterogeneous System Ignition by Local Energy Source with Limited Heat Content

Glushkov

Кузнецов

Стрижак

2014

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Numerical and experimental investigations were executed for determination of macroscopic regularities of heat and mass transfer processes under the conditions of the phase transformations and chemical reaction at the ignition of vapors coming from fabrics impregnated by combustible liquid into oxidant area at the local power supply. It was established that initial temperatureΘp>1of local energy source and volume fractionφ>30%of combustible liquid vapors in fabric are necessary for realization of ignition conditions in a system “fabric—combustible liquid—oxidant.”. Thus three ignition modes are possible for such system. The most widespread mode is an arrangement of ignition zone near the lateral side of local energy source. Also we obtained approximating expressions of ignition delay time on initial temperature and characteristic size of a local energy source for fabrics impregnated by some kinds of combustible liquids (gasoline, kerosene, and diesel fuel). Its dependences may be useful at engineering calculations of fire danger for processes of single hot particles interaction with liquid combustible substances.

show abstract

Properties of the surface layer and combustion behavior of metallized solid propellants

Cited by 19 publications

References 11 publications

Analysis and synthesis of solutions for the agglomeration process modeling

Analysis and synthesis of solutions for the agglomeration process modeling

Microstructure Effects in Aluminized Solid Rocket Propellants

Numerical and Experimental Research of Heat and Mass Transfer at the Heterogeneous System Ignition by Local Energy Source with Limited Heat Content

Contact Info

Product

Resources

About