Thermal conductivity of energetic materials

Lawless, Zachary D.; Hobbs, Michael L.; Kaneshige, Michael J.

doi:10.1080/07370652.2019.1679285

Cited by 24 publications

(22 citation statements)

References 15 publications

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“…The thermal conductivities for BP and SP were obtained from the temperature profiles in the initial ramps following Lawless et al. [9].…”

Section: Methodsmentioning

confidence: 99%

“…The run numbers in these tables are appended with either "s" or "v" representing sealed or vented experiments, respectively. The thermal conductivities for BP and SP were obtained from the temperature profiles in the initial ramps following Lawless et al [9]. Figure 3a and 3b present the internal temperatures (TC 1 in Figure 1b) and pressures for each of the BP and SP SITI experiments, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Cookoff of Black Powder and Smokeless Powder

Hobbs

Kaneshige

2021

Propellants Explo Pyrotec

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We have completed a series of both vented and sealed cookoff experiments of black powder and smokeless powder in our Sandia Instrumented Thermal Ignition (SITI) apparatus at bulk densities of 1078 and 729 kg/m3, respectively. The confining aluminum cylinder was ramped from room temperature to a set point temperature and then held at the setpoint temperature until ignition. The setpoint temperatures varied between 495 to 523 K for the black powder and 401 to 412 K for the more sensitive smokeless powder. The vented experiments show a significant delay in thermal ignition, indicating that the ignition is dependent on pressure. Post experimental debris shows greater violence for our smokeless powder experiments than our black powder experiments. A simplified universal cookoff model (UCM) was calibrated using the black powder and smokeless powder SITI data and used to predict pressurization and thermal ignition. The current work presents the first calibration of the UCM with a double base propellant. This work also presents the first pressure‐dependent cookoff model for black powder and smokeless powder.

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“…The thermal conductivities for BP and SP were obtained from the temperature profiles in the initial ramps following Lawless et al. [9].…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Cookoff of Black Powder and Smokeless Powder

Hobbs

Kaneshige

2021

Propellants Explo Pyrotec

Self Cite

View full text Add to dashboard Cite

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“…All results were supported by a Pareto analysis (see Supplemental Data). Regarding the time to reach the steady state, as shown in Figure 9a, conductivity has the highest influence [20], and as it increases, the time to achieve the steady state decreases. Specific heat also influences t st , and as it increases, more time is needed to heat the vessel.…”

Section: Design Of Experiments (Doe)mentioning

confidence: 98%

A Combined Experimental-Numerical Investigation of the Thermal Efficiency of the Vessel in Domestic Induction Systems

et al. 2022

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New studies are emerging to reduce energy costs and become a more sustainable society. One of the processes where the greatest savings can be made is in cooking, due to its large-scale global use. In this vein, this study aims to analyse the influence of the vessel in the thermal efficiency at the cooking process. For that purpose, a numerical model of a cooking vessel was designed and validated with three different experimental heating tests. One of the key factors of the process is the contact between the vessel and the glass, therefore, two new approaches to model the thermal contact between the vessel and the cooktop were explored. Once the numerical models were calibrated, a full factorial analysis was performed to quantify the influence of the key parameters of the vessel in the heating process during cooking (thermal conductivity, specific heat, convection and radiation coefficients, and vessel concavity). Two of the most influential parameters in the heating process are the conductivity and the thermal contact between the vessel and the glass. Higher cooking efficiency can be achieved both with a low thermal conductivity vessel and with a high concavity, i.e., increasing the isolation between the vessel and the glass.

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“…where σ is the standard deviation of the measurements, and this is assumed to be a constant. Substituting Equation (11) into Equation ( 2), the value of the stopping criterion ε can be given by ε…”

Section: Stopping Criterionmentioning

confidence: 99%

An Inverse Analysis for Establishing the Temperature-Dependent Thermal Conductivity of a Melt-Cast Explosive across the Whole Solidification Process

Zhang

Zhou

et al. 2022

Materials

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Thermal conductivity is one of the most important thermophysical properties of a melt-cast explosive. However, the temperature-dependent thermal conductivity of such explosives cannot be easily measured across the whole solidification process (including the liquid, semi-solid, and solid states). This study used an inverse analysis method to estimate the temperature-dependent thermal conductivity of a 2,4-dinitroanisole/cyclotetramethylenetetranitramine (DNAN/HMX) melt-cast explosive in a continuous way. The method that was used is described here in detail, and it is verified by comparing the estimated thermal conductivity with a prespecified value using simulated measurement temperatures, thereby demonstrating its effectiveness. Combining this method with experimentally measured temperatures, the temperature-dependent thermal conductivity of the DNAN/HMX melt-cast explosive was obtained. Some measured thermal conductivity values for this explosive in the solid state were used for further validation.

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Thermal conductivity of energetic materials

Cited by 24 publications

References 15 publications

Cookoff of Black Powder and Smokeless Powder

Cookoff of Black Powder and Smokeless Powder

A Combined Experimental-Numerical Investigation of the Thermal Efficiency of the Vessel in Domestic Induction Systems

An Inverse Analysis for Establishing the Temperature-Dependent Thermal Conductivity of a Melt-Cast Explosive across the Whole Solidification Process

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