Rheological Properties of DNAN/HMX Melt-cast Explosives : Maximum Packing Density Calculation and Modified Viscosity Model

• Autorzy: Meng Jun-jiong , Luo Yi-ming , Wang Wei , Jiang Qiu-li , Wang Hong-xing , Miao Fei-chao

Identyfikatory

DOI

10.22211/cejem/154975

• Języki publikacji: EN

Abstrakty

EN

The study of suspensions with high solid content and low viscosity has become a very active topic for melt-cast explosives, for both research and industry. Previous studies have described how the viscosity of high-solid-content suspensions can be decreased by optimizing the grade ratio, that is, increasing the particle packing density. This paper numerically simulates the maximum packing density (Φ_m) for different grade ratios at which the suspension viscosity approaches infinity, using the overlapping discrete element cluster method. According to this method, the shape of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) particles was modeled as a group of overlapping, rigidly connected hard spheres. The results showed that the numerical simulation value can be used as the real value of Φ_m for any grade ratio in engineering applications. The rheological properties of 2,4-dinitroanisole (DNAN)/HMX suspensions with various grade ratios of three HMX samples with different d₅₀ values were investigated using a rotational viscometer over a range of mass solids content (ϕ = 20-75 wt.%) in the shear rate range of 0.1-100 s⁻¹. An empirical model incorporating the reduced solid content (Φ, equal to ϕ divided by Φ_m) and shear rate (γ) was modified to predict the relative viscosity of DNAN/HMX suspensions. This modified model has a strong correlation with the experimental data and can be used to accurately predict the viscosity of DNAN/HMX suspensions. In addition, the applicability of different classical models to DNAN/HMX suspensions is discussed.

Słowa kluczowe

EN

2,4-dinitroanisole; DNAN; grade ratio; maximum packing density; rheological properties; empirical model

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2022
• Tom: Vol. 19, no. 3
• Strony: 326--359
• Opis fizyczny: Bibliogr. 43 poz., rys., tab., wykr.

Twórcy

autor

Meng Jun-jiong

• Composite Explosive Research Department, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China

autor

Luo Yi-ming

• Composite Explosive Research Department, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China

autor

Wang Wei

• Composite Explosive Research Department, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China

autor

Jiang Qiu-li

• Composite Explosive Research Department, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China

autor

Wang Hong-xing

• Composite Explosive Research Department, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China

autor

Miao Fei-chao

• School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China

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