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Full-Text Articles in Engineering
Low-Erosion Nozzle Materials For Long-Duration Hybrid Rocket Burns, Russell S. Babb
Low-Erosion Nozzle Materials For Long-Duration Hybrid Rocket Burns, Russell S. Babb
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Hybrid rocket systems, which employ a solid fuel grain and a liquid oxidizer, are a low-cost and environmentally friendly alternative to traditional rocket systems. However, hybrid rockets suffer from an increased nozzle throat erosion rate, which impacts motor performance and reliability. To address this issue several materials and low-erosion nozzle configurations were tested. The results of the testing campaign produced a nozzle that reduce the throat erosion rate five-fold.
Laboratory Modeling Of Erosion Potential Of Seepage Barrier Material, Nathan E. Braithwaite
Laboratory Modeling Of Erosion Potential Of Seepage Barrier Material, Nathan E. Braithwaite
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Earthen dams and levees often use seepage barriers to reduce the flow of water through their foundations and embankments. A seepage barrier is a wall of less porous material built inside an embankment or its foundation. High water pressures and stresses during the curing of seepage barriers have been observed to cause the seepage barriers to crack. These cracks decrease the barrier’s effectiveness in reducing seepage flow and may lead to serious seepage problems. The purpose of this study is to determine, given highly porous soils and high water pressures, whether or not cracks in seepage barriers will erode and …