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Proceedings Papers

Laser Powder Bed Fusion Manufactured Hydrostatic Journal Bearings for Turbomachinery: Design and Measurements of Static Load Testing With Air, Water, and Liquid Nitrogen

Chaeyeon Baek, Hyunsung Jung, Junwon Heo, Kyuman Kim, Keun Ryu
Proc. ASME. GT2024, Volume 10A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing, V10AT22A029, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-129557
https://doi.org/10.1115/GT2024-129557
.... A simple static load test rig is used to measure the flow rate, temperature, and stiffnesses of the test bearings while supplying compressed air, water, and liquid nitrogen with increasing static loads. The performance of these bearings is compared with counterparts produced via conventional subtractive...
View Paper titled, Laser Powder Bed Fusion Manufactured Hydrostatic Journal Bearings for Turbomachinery: Design and Measurements of Static Load Testing With Air, Water, and <span class="search-highlight">Liquid</span> <span class="search-highlight">Nitrogen</span>
Open the PDF for Laser Powder Bed Fusion Manufactured Hydrostatic Journal Bearings for Turbomachinery: Design and Measurements of Static Load Testing With Air, Water, and <span class="search-highlight">Liquid</span> <span class="search-highlight">Nitrogen</span> in another window
Topics: Bearings, Design, Hydrostatics, Journal bearings, Lasers, Manufacturing, Nitrogen, Stress, Testing, Turbomachinery
Proceedings Papers

Dynamic Response of a Rotor Supported on Hybrid Bearings in Air, Water, and Liquid Nitrogen: Measurements and Comparisons to Predictions

Howon Yi, Kyuman Kim, Hyunsung Jung, Keun Ryu
Proc. ASME. GT2024, Volume 10A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing, V10AT22A028, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-129423
https://doi.org/10.1115/GT2024-129423
... with a bearing length to bearing diameter ratio of approximately 0.42 and a bearing radial clearance to rotor radius ratio of around 0.0017. The bearings are tested with air, water, and liquid nitrogen, serving as surrogate test fluids for common propellants in liquid rocket engines. Rotor run-up and speed coast...
View Paper titled, Dynamic Response of a Rotor Supported on Hybrid Bearings in Air, Water, and <span class="search-highlight">Liquid</span> <span class="search-highlight">Nitrogen</span>: Measurements and Comparisons to Predictions
Open the PDF for Dynamic Response of a Rotor Supported on Hybrid Bearings in Air, Water, and <span class="search-highlight">Liquid</span> <span class="search-highlight">Nitrogen</span>: Measurements and Comparisons to Predictions in another window
Topics: Bearings, Dynamic response, Hydrostatics, Journal bearings, Nitrogen, Rotors, Water
Proceedings Papers

On the Performance of Hydrostatic Journal Bearings in Air, Water, and Liquid Nitrogen: Measurements and Predictions

Hyunsung Jung, Kyuman Kim, Keun Ryu
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT22A036, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104040
https://doi.org/10.1115/GT2023-104040
... liquids. The current work measures static load characteristics of hydrostatic journal bearings in air (25°C), water (from 25°C to 70°C), and liquid nitrogen (−197°C). Air, water, and liquid nitrogen are used as test fluids for the test bearing to evaluate the effects of fluid properties and temperatures...
View Paper titled, On the Performance of Hydrostatic Journal Bearings in Air, Water, and <span class="search-highlight">Liquid</span> <span class="search-highlight">Nitrogen</span>: Measurements and Predictions
Open the PDF for On the Performance of Hydrostatic Journal Bearings in Air, Water, and <span class="search-highlight">Liquid</span> <span class="search-highlight">Nitrogen</span>: Measurements and Predictions in another window
Topics: Bearings, Hydrostatics, Journal bearings, Nitrogen, Stress, Water