Experimental and numerical study of oxygen catalytic recombination of SiC-coated material

Yang, Yosheph; Kim, Ikhyun; Park, Gisu

doi:10.1016/j.ijheatmasstransfer.2019.118510

Cited by 28 publications

(7 citation statements)

References 44 publications

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“…-a substantial reduction of the thermal conductivity in the oxide layer, on which porosity itself can have a significant influence [51,52]; -an increased catalytic recombination efficiency due to a transition from an oxide layer mainly covered by glassy silica (relatively low γw [53,54]) to a scale primarily based on zirconia (relatively high γw [55]). In the next section, this interpretation will be quantitatively supported by the outcomes of numerical simulations, which will be compared with the experimental data.…”

Section: Discussionmentioning

confidence: 99%

Ultra-high-temperature testing of sintered ZrB2-based ceramic composites in atmospheric re-entry environment

Mungiguerra

Martino

Cecere

et al. 2020

International Journal of Heat and Mass Transfer

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Section: Discussionmentioning

confidence: 99%

Ultra-high-temperature testing of sintered ZrB2-based ceramic composites in atmospheric re-entry environment

Mungiguerra

Martino

Cecere

et al. 2020

International Journal of Heat and Mass Transfer

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“…Looking at Eq. (13) this observation is no coincidence. Applying the chain rule and dropping the mass generation term, which is zero away from the wall, one obtains…”

Section: Parameter Scaling and Resultsmentioning

confidence: 86%

“…[17] for a more extensive derivation of Eqs. (11)(12)(13). Note that accounts for the mass injection at the wall, for instance due to transpiration cooling.…”

Section: B Boundary Layer Transformation and Boundary Conditionsmentioning

confidence: 99%

“…Beyond corrosion and chemical attack, knowledge of freestream activated species at a wall is required to predict catalytic heat flux. While the catalytic efficiency of surface materials remains an important subject of investigation [12,13], little is known about the concentration of activated species at a given flight condition with stagnation point blowing. Fay and Riddell [2] predicted the recombination heat flux on a stagnation point in the absence of mass injection, but it is precisely this mechanism which shows a sharp decline in heat flux experimentally [6].…”

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confidence: 99%

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Correlation for Species Concentration on a Hypersonic Stagnation Point with Mass Injection

et al. 2022

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This paper presents a correlation to obtain the surface species concentration on a stagnation point with mass injection for hypersonic flow. The correlation can be used to determine surface recombination heat fluxes and oxidation levels for ablatives or actively cooled heat shields in thermochemical equilibrium flow. It explicitly expresses the wall species concentration as a function of freestream conditions, coolant properties and the stagnation point geometry, revealing the direct effect of the above parameters on the desired quantity. The method was compared against the numerically obtained self-similar solution and showed an accuracy of ±4%. The concentration depends on the boundary layer edge pressure, temperature and velocity gradient, as well as the wall temperature and injected mass flux. The molar mass and diffusion coefficient are further needed for scaling if the injected gas differs from the freestream gas.

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“…Fig 1 represents the schematic of the K1 shock tunnel test facility for the drag measurements in this study. The K1 shock tunnel was a conventional pressure-driven shock tunnel [26,27] which consisted of a shock tube, a nozzle, a test section, and a dump tank. The shock tube was composed of three axially symmetric parts: a driver tube (length of 2.4 m), a transition section (0.06 m), and a driven tube (3.6 m).…”

Section: Test Facilitymentioning

confidence: 99%

Assessment of drag measurement techniques in a shock tunnel

et al. 2022

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Three force measurement techniques in a shock tunnel, the free-flight, movable-support force balance, and stress-wave force balance techniques were employed, and each technique’s characteristics were assessed. For each force measurement technique, the system setup, data processing method, measurement uncertainties, and applied range of the test model size-flow establishment time were described in detail and compared. For a comparison and discussion, the drag coefficients of a circular pointed cone model with a semi-angle of 18.4° at a nominal freestream Mach number of 6 were measured. As a result, three force measurement techniques yield similar drag coefficients. However, the measurement uncertainties were increased in the order of the free-flight, the stress-wave force balance, and the movable-support force balance techniques. The main causes of the measurement uncertainties were the corner detection uncertainties for the free-flight techniques, and the propagation of the internal or external vibrations for the movable-support and stress-wave force balance techniques. To estimate the appropriate range of the test model size and flow establishment time for each technique’s application, the force measurement systems of the present work and the available literature were compared. As a result of comparative discussion, force measurement environments that can be advantageous for each technique are suggested.

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Experimental and numerical study of oxygen catalytic recombination of SiC-coated material

Cited by 28 publications

References 44 publications

Ultra-high-temperature testing of sintered ZrB2-based ceramic composites in atmospheric re-entry environment

Ultra-high-temperature testing of sintered ZrB2-based ceramic composites in atmospheric re-entry environment

Correlation for Species Concentration on a Hypersonic Stagnation Point with Mass Injection

Assessment of drag measurement techniques in a shock tunnel

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