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Full-Text Articles in Engineering
Heat Transfer Through A Rotating Ball Bearing At Low Angular Velocities, Sarah Isert
Heat Transfer Through A Rotating Ball Bearing At Low Angular Velocities, Sarah Isert
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Bearings are commonly used in mechanical systems when there are rotating parts in the system. For bearings that run at speeds above about 1000 revolutions per minute, such as those used in aircraft turbines, machining tools, and automotive engines, it is important to take into account the heat transfer through the bearing system due to friction. Heat transfer is generally not considered for applications where the bearing is rotating at low speeds, such as clocks and bicycles. However, for certain aerospace applications, such as precision instruments or wind turbines, the heat transfer through the bearing becomes relevant. The case where …
Anisotropic Compressive Pressure-Dependent Effective Thermal Conductivity Of Granular Beds, R. Daniel Garrett
Anisotropic Compressive Pressure-Dependent Effective Thermal Conductivity Of Granular Beds, R. Daniel Garrett
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In situ planetary effective thermal conductivity measurements are typically made using a long needle-like probe, which measures effective thermal conductivity in the probe's radial (horizontal) direction. The desired effective vertical thermal conductivity for heat flow calculations is assumed to be the same as the measured effective horizontal thermal conductivity. However, it is known that effective thermal conductivity increases with increasing compressive pressure on granular beds and horizontal stress in a granular bed under gravity is related to the vertical stress through Jaky's at-rest earth pressure coefficient. No research has been performed previously on determining the anisotropic effective thermal conductivity of …