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10 articles for “Whirling”
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Study on Influence of Different Forms of Damping and Operating Temperature on Whirling Speeds of Rotors
Abstract: Accurate prediction of rotor whirl speeds is fundamentally important in the design of rotating machinery. There has been an impressive progress in the study of rotor dynamics in the last decade. The use of finite elements for the simulation of rotor system makes it possible to handle complex problems. Rotating shaft tends to bow out at certain speeds and whirl in a complicated manner. This phenomenon results from various causes …
Published in Trends in Machine design · Vol. 4, Issue 2, 2017 · pp. 41–55 Read article
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Influence of Internal and External Dampings on Shaft Whirl Speeds
Abstract: A mathematical model is developed for the estimation of rotor forward and backward whirl speeds by considering the stationary and rotational dampings. Stationary damping includes external viscous damping in the bearings and rotational damping includes internal viscous and hysteretic damping in the shaft material. The rotors in gas turbines and steam turbines commonly used in military and commercial rotating machines operate at high speeds. These rotors are provided with a …
Published in Trends in Machine design · Vol. 3, Issue 3, 2016 · pp. 1–11 Read article
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Experimental Investigation of Shaft Whirl Carrying 3 Rotors
Abstract: This paper deals with the study of whirling of shaft with three rotors. Natural frequency of the system is found by impact hammer test followed by identifying the speed at which whirling occurs in the system. Experimental results were verified by using Dunkerley's method for natural frequency. Rayleigh-Ritz equation is used to find out the critical speed of the shaft and hence to validate with experimental result.Keywords: Whirling, Natural frequency, …
Published in Trends in Mechanical Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 17–21 Read article
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Currents, Waves, and Whirls: An Academic Exploration of Fluid Mechanics
Abstract: Fluid mechanics investigates the behavior of liquids and gases in motion and at rest, revealing the principles that control natural occurrences and engineering systems alike. This article gives an easy review of essential concepts such as fluid characteristics, pressure, flow patterns, and the contrast between laminar and turbulent flow. It explores how fundamental rules, including conservation of mass and energy, impact the transport of fluids across varied settings. Through real-world …
Published in Recent Trends in Fluid Mechanics · Vol. 13, Issue 1, 2026 · pp. 8–13 Read article
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LWG Theory of Black Holes for Interpretation and Analysis
Abstract: Black holes are devils of galaxy which can harvest the fabric of space and time to the void of infinity. Light may not come out of the black holes due to the facts sparsely known to the human intelligence. We often strain ourselves to look into the unknown and land in a conclusion which marks our statute towards the human capability. This study proposes theories which may likely control what …
Published in Research & Reviews : Journal of Physics · Vol. 8, Issue 3, 2019 · pp. 10–13 Read article
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Stabilizing Internal Damping in Hydrodynamic Bearings using Elegant Control Strategies
Abstract: The implementation of elegant control strategies to stabilize the internal damping problem in hydrodynamic bearing has been proposed in this paper. This implementation deals or gives an advantage of good stability of hydrodynamic bearing, even at critical or threshold speeds where an unstable whirl occurs leading to instability assisted greatly by this internal damping factor. Related stability graphs have been plotted using MATLAB 2013 and models have been designed using …
Published in Journal of Control & Instrumentation · Vol. 7, Issue 3, 2016 · pp. 44–49 Read article
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Stabilizing Varying Eccentricity Problem in Hydrodynamic Bearings Using Elegant Control Strategies
Abstract: The implementation of elegant control strategies to stabilize varying eccentricity problem in hydrodynamic bearing has been proposed in this paper. This implementation deals or gives an advantage of good stability of hydrodynamic bearing, even at critical or threshold speeds where an unstable whirl occurs leading to instability assisted greatly by this varying eccentricity factor. Hence in this paper, we take eccentricity as a function of variation and try to stabilize …
Published in Journal of Instrumentation Technology & Innovations · Vol. 6, Issue 3, 2016 · pp. 14–20 Read article
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CFD Analysis of Double Diffusion Rotating Flow in a Cylindrical Annular MHD Braking System with Joules Heating and Dufour Effects
Abstract: The present study has investigated Joules parameter significance on an axisymmetric whirling flow within a cylindrical annulus, specifically focusing on an MHD braking system. The cylindrical annulus braking system is packed lithium lid liquid (Pr = 0.015), aspect ratio = 2, and imposed to an axial heat and magnetic field. In this study, the modified MAC pressure correction method has been used to solve the mixed convection flow with double …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 1448–1462 Read article
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Heat Transfer Augmentation in Twisted Rectangular Channel
Abstract: Abstract The best way to profoundly and scientifically concentrate the heat exchange upgrade of nanofluids under turbulent course through twisted rectangular channels under consistent heat flux conditions on every one of the walls is to look at the marvel numerically. The nanofluids are fundamentally the strong nanoparticle of CuO suspended in water arranged chemically. CFD investigation is led utilizing FLUENT programming by the limited volume technique. The limit conditions connected …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 4, Issue 2, 2017 · pp. 47–55 Read article
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Heat Transfer Augmentation in Twisted Rectangular Channel
Abstract: The best way to profoundly and scientifically concentrate the heat exchange upgrade of nanofluids under turbulent course through Twisted Rectangular channels under consistent heat flux conditions on every one of the walls is to look at the marvel numerically. The nanofluids are fundamentally the strong nanoparticle of CuO suspended in water arranged chemically. CFD investigation is led utilizing FLUENT programming by the limited volume technique. The limit conditions connected are …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 10, Issue 2, 2020 · pp. 8–17 Read article