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Investigation of the Effect of Different Parameters of Phenolic/Highsilica Composite Insulation on its Thermal Resistance

Fadaei Reyhanabadei, Mohammad | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55547 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Hosseini Kordkheili, Ali
  7. Abstract:
  8. The purpose of this study, is to investigate and analyze the thermal resistance of phenolic composite insulation reinforced with high silica fibers. The properties of composites depend on the properties of their components .Therefore, by changing the type and percentage of its components, the performance of the insulation changes. Today, these types of composites are used as sacrificial thermal insulation in nozzles, motors, warheads or rocket launchers and rocket wings. In this project, phenolic composite bed flat samples have been made to test the thermal resistance and ablation. In this study, IL800 / 3 phenolic resin, high silica fabrics and 600 g / m2 carbon were used. Highsilica samples were tested with 40, 50 and 60 percent by weight of fibers and carbon samples with 50 percent by weight of fibers. Also,the effects of adding polyvinyl butyral (pvb) for 3, 1, 5 percent by weight of resin have been investigated in a sample with 50 percent by weight of highsilica fibers. The samples were made with the same baking cycle and using an autoclave. The evaluation of the insulation efficiency and the ablation behavior of each sample was achieved using the oxyacetylene test according to ASTM standards. From the obtained results, it was observed that, in general, with the increase of the percentage (pvb) in the resin, the temperature behind the insulation decreases, the efficiency of the insulation and its thermal resistance increase and Also, changing the type and weight percentage of fibers changes the thermal resistance and insulation efficiency
  9. Keywords:
  10. Insulation ; Composite ; Ablation ; Heat Resistance ; Phenolic/Highsilica Composite

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