Identification of Water Hammering for Centrifugal Pump Drive Systems
Applied Sciences, 2020 Water hammering is a significant problem in pumping systems. It damages the pipelines of the pump drastically and needs to identify with an intelligent method.
Nabanita Dutta +6 more
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Structure and Conceptual Design of a Water-Hammering-Type Honsang for Restoration [PDF]
Journal of Astronomy and Space Sciences, 2012 We analyzed the manufacturing procedure, specifications, repair history, and details of celestial movements of the water-hammering type Honsang (celestial globe).
Yong Sam Lee, Sang Hyuk Kim
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A Study on the Operation Mechanism of Ongnu, the Astronomical Clock in Sejong Era [PDF]
Journal of Astronomy and Space Sciences, 2011 Ongnu (Jade Clepsydra; also called Heumgyeonggaknu) is a water clock was made by Jang Yeong-sil in 1438. It is not only an automatic water clock that makes the sound at every hour on the hour by striking bell, drum and gong, but also an astronomical ...
Sang Hyuk Kim, Yong Sam Lee, Min Soo Lee
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Idealisations of Dynamic Modelling for Railway Ballast in Flood Conditions
Applied Sciences, 2019 As the main component of a ballasted railway system, railway ballast is frequently used by the railway industry to enhance constructability and practicality.
Sakdirat Kaewunruen, Tao Tang
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Water Hammer Simulation Method in Pressurized Pipeline with a Moving Isolation Device [PDF]
Water, 2021 Smart isolation devices (SIDs) are commonly used in pressurized subsea pipelines that need to be maintained or repaired. The sudden stoppage of the SID may cause large water hammer pressures, which may threaten both the pipeline and the SID. This paper proposes a simulation method by using a coupled dynamic mesh technique to simulate water hammer ...
Kang Zhang +4 more
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Fracture size inversion method based on water hammer signal for shale reservoir
Frontiers in Energy ResearchHydraulic fracturs size inversion plays an important role on evaluating hydraulic fracturing efficiency. Fracture size can be calculated by microseism events or all the pressure data generated by hydraulic fracturing stimulations. These methods are time-consuming.
Bo Zeng +7 more
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Numerical modeling and simulation of water hammer phenomena using the MacCormack method
Water Practice & TechnologyABSTRACT Water hammer refers to pressure fluctuations caused by changes in fluid speed in hydraulic systems. This research proposes a model using the MacCormack method to study and control water hammer, specifically focusing on managing valve closure to reduce shock wave pressure during transient flow.
Abdelouaheb Toumi +2 more
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A Study for the Restoration of Hong Dae-Yong Honsangui - Focusing on the structure and operating mechanism - [PDF]
Journal of Astronomy and Space Sciences, 2013 Honsangui (celestial globe) which is a water-hammering method astronomical clock is recorded in 「Juhaesuyong」 which is Volume VI of supplement from 『Damheonseo』, written by Hong Dae-Yong (1731~1783). We made out the conceptual design of Hong Dae-Yong’s
Yong Sam Lee +2 more
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Water Hammer Analysis by Characteristic Method [PDF]
American Journal of Engineering and Applied Sciences, 2008 Rapid changes in the velocity of fluid in closed conduits generate large pressure, which are transmitted through the system with the speed of sound. When the fluid medium is a liquid the pressure surges and related phenomena are described as water hammer.
A.R. Lohrasbi, R. Attarnejad
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A Study on the Internal Structure of Heumgyeonggaknu [PDF]
Journal of Astronomy and Space Sciences, 2013 Heumgyeonggaknu is a water-hammering type automatic water clock which was made by Jang Yeong-Sil in 1438. The water clock that is located in Heumgyeonggaknu consists of Suho which is equipped with 2-stage overflow.
Sang Hyuk Kim +3 more
doaj +1 more source