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Hybrid Rocket Engines: Development Of Composite Fuels With Complex 3d Printed Ports, Alec William Yenawine
Hybrid Rocket Engines: Development Of Composite Fuels With Complex 3d Printed Ports, Alec William Yenawine
Open Access Theses
Hybrid rocket engines provide many advantages over current solid and liquid systems including: throttling capability, good specific impulse, and relatively low cost due to greater operational safety and simplicity. However, hybrid rockets are limited by low fuel regression rates and combustion efficiencies. In recent years, additive manufacturing (AM) has been implemented in the design, print, and testing of hybrid rocket fuels. AM has enabled design of fuel grains with complex port geometries which are not possible or difficult to achieve through conventional casting techniques. These geometries can be used to manipulate the oxidizer flow and fuel interactions to increase performance …
In-Situ Particle Sizing Of Agglomerates In Aluminized Solid Composite Propellants Using Digital Inline Holography (Dih), Michael S. Powell
In-Situ Particle Sizing Of Agglomerates In Aluminized Solid Composite Propellants Using Digital Inline Holography (Dih), Michael S. Powell
Open Access Theses
Aluminized ammonium perchlorate composite propellants (APCP) form large molten agglomerated particles that can result in poor combustion performance and increased two-phase flow losses. Quantifying agglomerate size distributions is important for assessing these losses for different types of aluminum fuels that can help improve rocket performance. It is highly desirable to measure particle sizes in-situ using non-intrusive optical methods, rather than conventional particle collection, which can have large uncertainties. Regular high-speed microscopic imaging suffers from a limited depth of field. Digital inline holography (DIH) is an alternative approach that results in 3D information through numerical reconstruction. In this paper, DIH approach …