Pressure Fluctuation Analysis of Laboratory Scale Air/Polyethylene Fluidized Beds

2008 ◽  
Vol 82 (2) ◽  
pp. 227-235 ◽  
Author(s):  
Loni Schober ◽  
Apostolos Kantzas ◽  
Ron Hugo
Keyword(s):  
Pressure Fluctuation ◽  
Fluidized Beds ◽  
Laboratory Scale ◽  
Fluctuation Analysis

Bubble characteristics by pressure fluctuation analysis in gas-solid bubbling fluidized beds with or without internal

2016 ◽  
Vol 34 (2) ◽  
pp. 566-573 ◽  
Author(s):  
Keon Bae ◽  
Jong Hun Lim ◽  
Joon-Hwan Kim ◽  
Dong-Ho Lee ◽  
Joo-Hee Han ◽  
...  
Keyword(s):  
Pressure Fluctuation ◽  
Fluidized Beds ◽  
Fluctuation Analysis ◽  
Bubble Characteristics

Study on the Reduction of Pressure Fluctuation for a Double-Suction Centrifugal Pump With Staggered Blades

2018 ◽  
Author(s):  
Qian-qian Li ◽  
Da-zhuan Wu
Keyword(s):  
Centrifugal Pump ◽  
Pressure Fluctuation ◽  
Cfd Simulation ◽  
Stokes Equations ◽  
Low Noise ◽  
Living Environment ◽  
Centrifugal Impeller ◽  
Fluctuation Analysis ◽  
Centrifugal Pumps ◽  
Vibration Performance

Due to the distinctive characteristic of massive flow rates, double-suction centrifugal pump has been extensively applied in lots of perspectives, such as drainage, irrigation, transportation projects and other hydraulic engineering realms. Nevertheless, the significance of the pressure fluctuation inside the double-suction centrifugal pump, which is getting more and more prominent under the soaring demands for low noise and comfortable living environment, could not be underestimated. Consequently, how to reduce the pressure fluctuation as far as possible and enhance the running stability of the pump is always the research hotspot. In this study, the double-suction centrifugal impeller with abominable vibration performance is redesigned to improve the internal flow and reduce the flow-induced noise. What’s addition, the two redesigned impellers wearing splitter blades were compared in staggered arrangement with different angles for the purpose of ulteriorly decreasing the pressure fluctuation. On the basis of Realizable k-ε model and SIMPLEC algorithm, the unsteady Reynolds-averaged Navier-Stokes equations (URANS) were resolved by means of CFD simulation and the flow performance and the vibration performance were validated with the experiments. The results illustrate that the redesigned impeller with multi-blade could raise the hydraulic performance and reduce the pressure fluctuation inside the pump. When the impeller of each side was laid with the staggered angle of 12 degrees, the pressure distribution tended to be more uniform and the pressure fluctuation was well ameliorated. Through the pressure fluctuation analysis in time domain and frequency domain, the pressure change inside the pumps could be evaluated quantitatively and accurately, hence different pumps could be contrasted in detail. The consequences of this paper could provide reference for pressure fluctuation reduction and vibration performance reinforcement of double-suction centrifugal pumps as well as other vane pumps.

scholarly journals Agglomeration detection by pressure fluctuation analysis during Cynara cardunculus L. gasification in a fluidized bed

2016 ◽  
Vol 284 ◽  
pp. 640-649 ◽  
Author(s):  
Jesús Gómez-Hernández ◽  
Daniel Serrano ◽  
Antonio Soria-Verdugo ◽  
Sergio Sánchez-Delgado
Keyword(s):  
Fluidized Bed ◽  
Pressure Fluctuation ◽  
Fluctuation Analysis ◽  
Cynara Cardunculus

A numerical study of the bubble induced pressure fluctuation in gas-fluidized beds

2017 ◽  
Vol 314 ◽  
pp. 387-399 ◽  
Author(s):  
Yuli Zhang ◽  
Rui Xiao ◽  
Mao Ye ◽  
Zhongmin Liu
Keyword(s):  
Pressure Fluctuation ◽  
Fluidized Beds ◽  
Numerical Study ◽  
Gas Fluidized Beds

Estimation of the minimum spouting velocity based on pressure fluctuation analysis

2020 ◽  
Vol 113 ◽  
pp. 56-65
Author(s):  
Ronaldo Correia de Brito ◽  
Mikel Tellabide ◽  
Idoia Estiati ◽  
José Teixeira Freire ◽  
Martin Olazar
Keyword(s):  
Pressure Fluctuation ◽  
Fluctuation Analysis
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