An efficient inverse approach for reconstructing time- and space-dependent heat flux of participating medium*

Sun, Shaofang; Wang, Guangjun; Chen, Hong

doi:10.1088/1674-1056/aba608

Cited by 8 publications

(2 citation statements)

References 44 publications

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“…IHTPs originally emerged in the late 1950s when it was found that the aerodynamic heating of space vehicles is so high during re-entry to the atmosphere that the surface temperature of the thermal shield cannot be measured directly using temperature sensors. Since then, IHTPs have been used to estimate all kinds of unknown quantities [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ], including, among others, initial/boundary conditions, source terms, geometry, heat flux, and thermophysical properties.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…Tapaswini et al [25] used a variational iteration method (VIM) to reconstruct the boundary heat flux. Sun et al [26] employed the decentralized fuzzy inference method (DFIM) to estimate the time-and space-dependent heat flux of two-dimensional (2D) participating medium.…”

Section: Introductionmentioning

confidence: 99%

Model predictive inverse method for recovering boundary conditions of two-dimensional ablation*

Wang¹,

Zhang²,

Chen³

2021

Chinese Phys. B

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A model predictive inverse method (MPIM) is presented to estimate the time- and space-dependent heat flux on the ablated boundary and the ablation velocity of the two-dimensional ablation system. For the method, first of all, the relationship between the heat flux and the temperatures of the measurement points inside the ablation material is established by the predictive model based on an influence relationship matrix. Meanwhile, the estimation task is formulated as an inverse heat transfer problem (IHTP) with consideration of ablation, which is described by an objective function of the temperatures at the measurement point. Then, the rolling optimization is used to solve the IHTP to online estimate the unknown heat flux on the ablated boundary. Furthermore, the movement law of the ablated boundary is reconstructed according to the estimation of the boundary heat flux. The effects of the temperature measurement errors, the number of future time steps, and the arrangement of the measurement points on the estimation results are analyzed in numerical experiments. On the basis of the numerical results, the effectiveness of the presented method is clarified.

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Fuzzy estimation for transient distribution of internal thermal excitation in composite overwrapped pressure vessel

Wang

Mao

et al. 2022

Applied Thermal Engineering

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An efficient inverse approach for reconstructing time- and space-dependent heat flux of participating medium*

Cited by 8 publications

References 44 publications

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

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

Model predictive inverse method for recovering boundary conditions of two-dimensional ablation*

Fuzzy estimation for transient distribution of internal thermal excitation in composite overwrapped pressure vessel

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