scholarly journals Reduced Scale Experimental Study and CFD Analysis on the Resistance Characteristic of Utility Tunnel’s Ventilation System

2019 ◽  
Vol 158 ◽  
pp. 2756-2761 ◽  
Author(s):  
Shu Li ◽  
Xuefeng Liu ◽  
Jiaxu Wang ◽  
Guanyu Fang ◽  
Wenjing Chen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Ventilation System ◽  
Cfd Analysis ◽  
Resistance Characteristic ◽  
Reduced Scale

Experimental Study and CFD Analysis of the Volumatic® Spacer

2008 ◽  
Author(s):  
Sofia Abreu ◽  
Lui´s Silva ◽  
Senhorinha F. C. F. Teixeira ◽  
Henedina Antunes ◽  
Helena Marques ◽  
...  
Keyword(s):  
Experimental Study ◽  
Air Flow ◽  
The Body ◽  
Respiratory Cycle ◽  
Cfd Analysis ◽  
Aerosol Flow

The aim of the present study was to evaluate the performance of Ventilan® coupled to the Volumatic® spacer. An experimental study was conducted using the four stage Multistage Liquid Impinger (MSLI). This enabled the observation that half of the pharmacological dose is retained within the body of the spacer. Therefore, the air flow inside the spacer was studied, along the respiratory cycle, using Fluent™. Several recirculation regions were observed inside the spacer that may influence the aerosol flow and also the deposition of the drug.

CFD Analysis on Similarity Criteria of Hydrodynamic Characteristics for Gravity-Installed Anchors

2019 ◽  
Author(s):  
Jiancai Gao ◽  
Haixiao Liu
Keyword(s):  
Model Testing ◽  
Model Tests ◽  
Similarity Criteria ◽  
Scale Model ◽  
Hydrodynamic Characteristics ◽  
Cfd Analysis ◽  
Cfd Simulations ◽  
Tests Of Gravity ◽  
Free Falling ◽  
Reduced Scale

Abstract For reduced-scale model tests of gravity-installed anchors (GIAs), it is of great significance to extrapolate the testing results to prototype. This highlights the necessity of investigation of similarity criteria. The present work aims to find the similarity criteria of three prioritized hydrodynamic characteristics including VT, HP, and Cd for GIAs during installation in water through CFD simulations. In the present study, free falling processes of different reduced-scale T98 anchor models and prototype anchor is simulated, from which VT, HP, and Cd are extracted and analyzed to get the fitting curves for these three characteristics over reduced-scale λ. Based on these curves, hydrodynamic characteristics for prototype and other reduced-scale model can be extrapolated from model testing results. And, the researching procedure in this paper sets an example and reference to study about similarity criteria for other hydrodynamic characteristics.

Experimental study on beam shaping in a reduced-scale relay mirror system

2012 ◽  
Vol 45 (1) ◽  
pp. 1-9
Author(s):  
Huiyun Wu ◽  
Haotong Ma ◽  
Xiaojun Xu ◽  
Jinbao Chen ◽  
Yijun Zhao
Keyword(s):  
Experimental Study ◽  
Beam Shaping ◽  
Mirror System ◽  
Reduced Scale

Experimental Study of Flow Field of Large Air-Cooled Turbine Generator for Multi-Ventilation Ducts of Stator

2014 ◽  
Vol 644-650 ◽  
pp. 377-380
Author(s):  
Yi Ping Lu ◽  
Qing Hui Pan ◽  
Hui Lan Li ◽  
Jia De Han
Keyword(s):  
Experimental Study ◽  
Flow Field ◽  
Axial Symmetry ◽  
Ventilation System ◽  
Hot Wire ◽  
Turbine Generator ◽  
Turbine Generators ◽  
Air Supply ◽  
Ventilation Ducts ◽  
Machine Configuration

To study rotational air flow field of rotor and complicated flow distinction owing to multi-ventilation ducts of stator in a large air-cooled turbine generator, considering axial symmetry of air supply, an experiment setup of ventilation system of semi-machine configuration was built in this paper. At condition of rotating, ventilation is measured by hot-wire anemometer. Firstly, ventilation in 16 different semi-circle radius is got. Measurement shows that ventilation in different radius varies much. Then ventilation of outlet of stator ducts is measured. The result shows that ventilation which is affected by flow back and jet less is higher. The conclusion will provide theoretical references for ventilation cooling of rotor ducts in large air-cooled turbine generators.

Experimental Study of a Launching Gantry Reduced Scale Model strengthened with Organic Prestressing

2006 ◽  
Vol 16 (1) ◽  
pp. 49-52 ◽  
Author(s):  
Antonio Carlos Guerreiro Morgado Andre ◽  
Pedro Alvares Ribeiro Pacheco ◽  
Antonio Adao da Fonseca
Keyword(s):  
Experimental Study ◽  
Scale Model ◽  
Reduced Scale
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