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Identification of Water Hammering for Centrifugal Pump Drive Systems [PDF]
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 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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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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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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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
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A Study on Ganui-Dae’s External Form and Its Modeling for Restoration [PDF]
Journal of Astronomy and Space Sciences, 2013 Ganui-Dae, built in the reign of King Sejong, Joseon Dynasty, is a comprehensive observatory. It has various instruments for observation and time signal such as Ganui, Gyupyo(Gnomon), water-hammering type Honui and Honsang, and so on. Studying on Ganui-
Min-Soo Lee +3 more
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Strong Stability Preserving Runge-Kutta Methods Applied to Water Hammer Problem
Trends in Computational and Applied Mathematics, 2022 The characteristic method of lines is the most used numerical method applied to the water hammer problem. It transforms a system of partial differential equations involving the independent variables time and space in two ordinary differential equations along the characteristics curves and then solve it numerically. This approach, although showing great
D. F. G. Santiago +3 more
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Numerical Methods of Visco-elastic Segments on Water Hammer Pressures [PDF]
Numerical Methods in Civil Engineering, 2020 Water hammer is a phenomenon accompanied by damage, vibration and noise. In order to deal with this phenomenon, different solutions have been proposed. Mechanical behavior of pipe material can significantly affect pressure responses of the pipe system during the transient flow.
J. Rahimi Firuz +2 more
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