Heat shield erosion in a dusty Martian atmosphere

Papadopoulos, Periklis; Tauber, Michael E.; Chang, I-Dee

doi:10.2514/6.1992-855

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…Given average storm duration and the residence time of dust particles in the high atmosphere after a storm has passed, prior analysis has indicated that there is a 2-4% chance of encountering significant quantities of high-altitude atmospheric dust during a given entry mission. 67 The possible presence of dust particles in the upper atmosphere is an aeroheating/TPS design concern because of the potential for enhanced mechanical erosion of the heatshield during the entry. Such erosion would need to be compensated for with additional margin (thickness) on the TPS.…”

Section: Physical Modelsmentioning

confidence: 99%

A Review of Aerothermal Modeling for Mars Entry Missions

Wright

Tang

Edquist

et al. 2010

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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The current status of aerothermal analysis for Mars entry missions is reviewed. The aeroheating environment of all Mars missions to date has been dominated by convective heating. Two primary uncertainties in our ability to predict forebody convective heating are turbulence on a blunt lifting cone and surface catalysis in a predominantly CO2 environment. Future missions, particularly crewed vehicles, will encounter additional heating from shock-layer radiation due to a combination of larger size and faster entry velocity. Localized heating due to penetrations or other singularities on the aeroshell must also be taken into account. The physical models employed to predict these phenomena are reviewed, and key uncertainties or deficiencies inherent in these models are explored.

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Section: Physical Modelsmentioning

confidence: 99%

A Review of Aerothermal Modeling for Mars Entry Missions

Wright

Tang

Edquist

et al. 2010

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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Section: Introductionmentioning

confidence: 99%

Sensitivity study of high-speed dusty flows over blunt bodies simulated using a discontinuous Galerkin method

Ching

Ihme

2019

AIAA Scitech 2019 Forum

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Recent interest in human-scale Mars missions has motivated research into the effects of dust particles that are suspended in the Martian atmosphere on reentry vehicles. For instance, these dust particles can enhance erosion of thermal protection systems and amplify surface heat fluxes. As such, in this work, we perform numerical simulations of hypersonic dusty flows over a blunt body using a two-way-coupled Lagrangian particle method in a discontinuous Galerkin framework. Due to the lack of a well-established physical model of the disperse phase appropriate for this multiphase flow regime, we aim to evaluate the sensitivities of numerically predicted dust-induced heat flux augmentation to various components and parameters of the model. Specifically, we investigate the drag coefficient correlation, the Nusselt number correlation, different terms in the particle momentum and energy equations, and particle size.

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“…A key feature of the Mars atmosphere is the high levels of suspended dust particles, which can significantly influence the flow environment. During dust storms, suspended particles, on the order of microns in size, can reach altitudes up to 60 km [1], at which approximate flight velocities and Mach numbers are 7.4 km/s and 40, respectively, based on previous trajectory analyses [2].…”

Section: Introductionmentioning

confidence: 99%

Development of a Lagrangian Particle Tracking Method for High-Order Discontinuous Galerkin Schemes

Ching

Brill

et al. 2018

2018 AIAA Aerospace Sciences Meeting

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This paper discusses the development of a Lagrangian particle method in a discontinuous Galerkin framework to support supersonic dusty flow simulations. This is relevant to reentry flows in the Mars atmosphere, which is characterized by the presence of a large number of suspended dust particles. These dust particles can not only enhance erosion of thermal protection systems but also transfer energy and momentum to the shock layer, increasing surface heat fluxes. This works represents a first step towards enabling high-fidelity simulations of high-speed flows in dusty environments using discontinuous Galerkin methods. Two-way coupling between the carrier and disperse phases is considered, and difficulties associated with searching for and locating particles in unstructured grids with curved elements are addressed. The particle method is applied to a number of test cases, including supersonic flows over a flat plate and a circular cylinder.

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Heat shield erosion in a dusty Martian atmosphere

Cited by 6 publications

References 4 publications

A Review of Aerothermal Modeling for Mars Entry Missions

A Review of Aerothermal Modeling for Mars Entry Missions

Sensitivity study of high-speed dusty flows over blunt bodies simulated using a discontinuous Galerkin method

Development of a Lagrangian Particle Tracking Method for High-Order Discontinuous Galerkin Schemes

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