Calculation of wall loading dynamics in a spherical combustion chamber

Belov, A. I.; Belyaev, V. M.; Kornilo, V. A.; Marchenko, A. I.; Romanov, G. S.; Chernukha, V. V.

doi:10.1007/bf01463688

Cited by 7 publications

(1 citation statement)

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“…In fact, the pressure time-history, which acts on chamber walls subjected to fully or partially confined HE detonations, is commonly described by three components. In this context, the three pressure components that are generated by confined HE detonations that occur on spherical chambers have been described from theoretical derivations (Abakumov et al, 1984; Belov et al, 1986; Zhdan, 1981), numerical simulations (Donahue et al, 2013; Dong et al, 2012; Hernandez et al, 2016; Li et al, 2008), and observed from experimental data (Adishchev and Kornev, 1979; Anderson et al, 1983; Belov et al, 1986; Beshara, 1994; Buzukov, 1980; Chan and Klein, 1994; Donahue et al, 2013; Dong et al, 2012; Hernandez et al, 2016; Karpp et al, 1983; Li et al, 2008). The first component is an impulsive component caused by the reflection of the first shock wave, which propagates supersonically from the detonation point until it reaches the chamber wall.…”

Section: Introductionmentioning

confidence: 99%

On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations

Hernández

Hao

Zhang

2018

Advances in Structural Engineering

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This article presents a comparative study on the effectiveness of ventilation to mitigate blasting effects on chambers subjected to confined detonations of high explosives. The pressure time-history that acts on the chamber walls is described by three components: (1) the first shock wave, (2) the train of re-reflected shock waves, and (3) the gas pressure. The radial response of spherical chambers is described by the radial breathing mode and modeled by an equivalent single degree of freedom system. The three pressure components are considered for the calculation of the maximum ductility ratio, which is obtained from the numerical solution of the single degree of freedom chamber response. It is assumed that openings reduce the gas pressure but they have an insignificant effect on shock waves. The dynamic response of fully and partially confined chambers are calculated and compared. Results show that intermediate/small openings (less than 10% of the surface of the chamber) are ineffective to mitigate the chamber response and damage. The vibratory response of the chamber is susceptible to elastic or plastic resonance but it is not considerably modified by the long-term gas pressure because of its high radial breathing mode frequency, allowing concluding that ventilation is ineffective to reduce the maximum response of spherical chambers subjected to internal high explosive explosion.

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