Autor: Xia, Jianxin - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Hydraulic Research for Lateral Plant Obstruction in an Open Channel
Autorzy:: Tymiński, Tomasz
Wolski, Krzysztof
Gruszczyński, Maciej
Xia, Jianxin
Ren, Huatang
Yao, Nijun
Powiązania:: https://bibliotekanauki.pl/articles/124647.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: fascine overfall
coefficient of discharge
local resistance
damming up
Opis:: The hydraulic model testing results of flow of a water stream through a lateral plant obstruction are presented in the paper. The plant element was formed by natural deciduous and coniferous tree branches filling the space between tree trunks set in chequered pattern. The experiments conducted in a horizontal, rectangular hydraulic channel included the measurements of flow intensity, difference in water surface level before and after the obstruction and filling of the channel on the upstream and downstream sides. A preliminary analysis of results was performed determining the coefficient of local losses of lateral plant obstruction. The coefficient of water discharge for the fascine overfall case assumed for the plant obstruction was determined as well.
Źródło:: Journal of Ecological Engineering; 2019, 20, 3; 214-218
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Dynamic states equations of transport pipeline in deep-sea mining
Autorzy:: Sobota, Jerzy
Jianxin, Xia
Kirichenko, Evgeniy
Powiązania:: https://bibliotekanauki.pl/articles/2073867.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: górnictwo głębinowe
rurociąg głębinowy
rurociąg transportowy
deep-sea mining
vertical pipeline
stability of deep-sea pipeline
Opis:: The transport pipeline of lifting the underwater minerals to the surface of the water onto the ship during the movement of the vessel takes in the water a curved deformed shape. Analysis of the state of stability of the pipeline showed that if the flow velocity of fluid in the pipeline exceeds a certain critical value Vkr, then its small random deviations from the equilibrium position may develop into deviations of large amplitude. The cause of instability is the presence of the centrifugal force of the moving fluid mass, which occurs in places of curvature of the axis of the pipeline and seeks to increase this curvature when the ends of the pipeline are fixed. When the critical flow velocity is reached, the internal force factors become unable to compensate for the action of centrifugal force, as a result of that a loss of stability occurs. Equations describing this dynamic state of the pipeline are presented in the article.
Źródło:: Archives of Mining Sciences; 2021, 66, 3; 385--392
0860-7001
Pojawia się w:: Archives of Mining Sciences
Dostawca treści:: Biblioteka Nauki

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