Intial TPS Design - Initial Material comparison for capsule...

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Initial Material comparison for capsule heat shield design By Ez A Hassan Introduction: Thermal protection systems or TPS are designed for space crafts and space capsules to protect it from the heat of reentry. During reentry space vehicles are moving at very high speeds, and are encountering extreme heating conditions. Temperatures during reentry are on the order of thousands degrees Fahrenheit. There are mainly two classes of TPS, reusable TPS, and ablative TPS. Reusable Vs. ablative Reusable TPS heating results in a significant amount of energy being re-radiated from the heated surface while the rest is conducted to the TPS material. The coating for material usually has high emissivity to maximize amount of energy being radiated, and low surface catalycity to minimize convective heating. The primary material for reusable TPS is usually inorganic with low thermal conductivity to minimize the mass of the material being used Figure 1 shows the common structure for reusable TPS.
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