Combustion Characteristics and Mechanism of Boron-based, Fuel-rich Propellants with Agglomerated Boron Powder

• Autorzy: Xu H. -X. , Pang W.-Q. , Guo H.-W. , Zhao F.-Q. , Wang Y. , Sun Z.-H.
• Języki publikacji: EN

Abstrakty

EN

In order to extend the burning rate of boron-based, fuel-rich solid propellants with agglomerated boron powder, the effects of the boron content, the AP content, and of the magnesium powder content, on the burning rate and pressure exponent have been studied systematically. It has been shown that when the AP content is constant, the burning rate of the propellants increases with an increase in the agglomerated boron content. Furthermore, the burning rate and pressure exponent increase with increasing the contents of AP and magnesium powder. By means of single colour frame amplification photography and combustion wave tests, the combustion mechanism of these propellants has been investigated. It has been shown that the flame of the propellants becomes brighter by increasing the AP content, the dT/dxcp and dT/dxgp of the propellant FR-5 being around 6815 and 5789 °C/mm respectively, higher than those of FR-4, resulting in greater burning rates. The Ts of these propellants is above 683 °C, which is higher than the decomposition peak temperatures of agglomerated boron powder and of propellants (about 649 °C), which indicates that agglomerated boron powder is partially oxidized on the combustion surface, and the heat released from it may be beneficial to the combustion of the propellants.

Słowa kluczowe

EN

analytical chemistry; boron-based fuel-rich solid propellants; agglomerated boron powder; combustion performance; combustion mechanism

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2014
• Tom: Vol. 11, no. 4
• Strony: 575--587
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Xu H. -X.

• Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Shaaxi Xi’an 710065, China

autor

Pang W.-Q.

• Xi’an Modern Chemistry Research Institute, Shaaxi Xi’an 710065, China

autor

Guo H.-W.

• Xi’an Modern Chemistry Research Institute, Shaaxi Xi’an 710065, China

autor

Zhao F.-Q.

• Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Shaaxi Xi’an 710065, China

autor

Wang Y.

• Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Shaaxi Xi’an 710065, China

autor

Sun Z.-H.

• Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Shaaxi Xi’an 710065, China

Bibliografia

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• [4] John C., Coating of Boron Particles, US Patent 4 915 753, 1988.
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• [6] Macri B.J., Process for Making Spheroidal Agglomerates, US Patent 3 646 174 A, 1972.
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