Calculation of carbon ablation on a re-entry body during supersonic/subsonic flight

Hunter, L. W.; Perini, L.L.; Conn, D. W.; Brenza, P. T.

doi:10.2514/3.25834

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…For studying the ablation heat transfer process, the following simplifications are considered, as suggested in Ref. [37]: (i) during the ablation stage, the ablation material gasifies directly without going through the liquefaction process; (ii) the heat absorbed by the complex physicochemical reactions on the ablated boundary is equivalent to the latent heat H AB in the ablation stage; (iii) the temperature of the ablated boundary maintains the phase transition temperature T AB of the material in the ablation stage. The transient temperature field T (x, y,t) of the ablation material is described by the following equation:…”

Section: Ablation Model and Numerical Methods 21 Ablation Modelmentioning

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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Section: Ablation Model and Numerical Methods 21 Ablation Modelmentioning

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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“…In the process of designing the ablation thermal protection system, not only the surface ablation rate, the ablation volume change, but also the temperature field in the protective layer and the thermal stress should be considered. The mechanism of ablation heat transfer [3] shows that the surface temperature of the material surface is gradually increased, when the material surface is heated, and if the surface temperature reaches a certain temperature, the complex physical and chemical reactions such as pyrolysis, melting, gasification and sublimation will occur on the surface material, resulting in changes the surface shape of the ablation material. For the numerical simulation of heat transfer in ablation, there are many studies both at home and abroad.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Two-dimensional Ablation Heat Transfer Process Based on Moving Mesh

Zhang¹,

Hong²

2018

dteees

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Abstract. In this paper, a two-dimensional ablation heat transfer model with moving boundary is established for the ablation heat transfer process. The transient temperature field and surface ablation rate of the model were numerically calculated by finite element method and moving mesh technology. The relationship between the ablation rate of the node on the ablation moving boundary and the external heat flux of the boundary was qualitatively analyzed. The calculation results show that the calculation of two-dimensional ablation heat transfer model with finite element and moving mesh technology has good stability and convergence.

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Heat transfer—a review of 1986 literature

Eckert

Goldstein

Pfender

et al. 1987

International Journal of Heat and Mass Transfer

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Calculation of carbon ablation on a re-entry body during supersonic/subsonic flight

Cited by 7 publications

References 5 publications

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

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

Numerical Simulation of Two-dimensional Ablation Heat Transfer Process Based on Moving Mesh

Heat transfer—a review of 1986 literature

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