A numerical study is developed to predict of flow behavior and heat transfer processes during rotational molding of polymer powder by using Discrete Element Method (DEM). The aim of this study is to model different forms, the evolution of mixing and segregation and the evolution of heat transfers in polymer powder. Influence of physical and thermal properties on the granular flow and heat transfer are investigated though the numerical example of polymer powder HDPE.
Generation Orbit (GO) is developing the GO Launcher-1 (GO-1), a single stage liquid rocket that is launched from a Gulfstream III carrier aircraft platform. The vehicle is designed as the next generation platform for hypersonic flight testing and suborbital microgravity research. To reduce mass and increase payload, GO partnered with NASA Langley Research Center to design, analyze, optimize, and fabricate a tow-steered manufacturing development unit of a cylindrical section of a liquid oxygen tank. The fabrication process of using the ISAAC (Integrated Structural Assembly of Advanced Composites) system is described. The structural design challenges and the concept design solutions are also presented to provide the context for the fabrication process. The in-situ nondestructive evaluation supporting the effort is also described.
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