B204 Visualization of exchange flow and evaluation of flow rate in the different density gases : 2nd report: numerical analysis by the particle method

To seek the fan operating point on a cooling system with fans, it is very important to determine the system impedance curve and it has been usually examined with the fan tester based on ASHRAE standard and AMCA standard. This leads to a large investment in time and cost, because it could not be executed until the system is made actually. Therefore it is necessary to predict the system impedance curve through numerical analysis so that we could reduce the measurement time and effort. This paper presents how the system impedance curve (pressure drop curve) is computed by CFD in substitute for experiment. In reverse order to the experimental principle of the fan tester, pressure difference was adopted first as inlet and outlet boundary conditions of the system and then flow rate was calculated. After determining the system impedance curve, it was compared with experimental results. Also the computational domain of the system was investigated to minimize computational time.

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Numerical analysis of axial fan characteristics

Mechanik ◽

10.17814/mechanik.2018.7.98 ◽

2018 ◽

Vol 91 (7) ◽

pp. 606-608

Author(s):

Stanisław Wrzesień ◽

Michał Frant ◽

Maciej Majcher

Keyword(s):

Numerical Analysis ◽

Numerical Methods ◽

Flow Rate ◽

Total Pressure ◽

Volumetric Flow Rate ◽

Total Efficiency ◽

Axial Fan ◽

Axial Fans ◽

Basic Characteristics

The paper presents an analysis and comparison of basic characteristics of axial fans, both analytically and numerically. Such characteristics are: the characteristics of the total pressure, power and total efficiency as a function of the volumetric flow rate. The presented results showed significant quantitative and qualitative differences in the characteristics obtained by two methods. The usefulness of numerical methods in relation to the results of the initial analytical project was confirmed.

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Numerical Analysis of Flow Rate Distribution of Diffusers with Various Shapes

Transactions of the Korean Society of Mechanical Engineers B ◽

10.3795/ksme-b.2014.38.9.789 ◽

2014 ◽

Vol 38 (9) ◽

pp. 789-795

Author(s):

Myoung Soo Kim ◽

Hoo Bae Kim ◽

Hyoung Gwon Choi

Keyword(s):

Numerical Analysis ◽

Flow Rate ◽

Rate Distribution

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The Effect of Sulphur Dioxide Exposure under Controlled Environmental Conditions on the Challenge Performance of Copper and Chromate Impregnated Active Carbon against Hydrogen Cyanide

Adsorption Science & Technology ◽

10.1177/026361749701500706 ◽

1997 ◽

Vol 15 (7) ◽

pp. 531-540 ◽

Cited By ~ 3

Author(s):

P.J.C. Anstice ◽

J.F. Alder

Keyword(s):

Activated Carbon ◽

Numerical Analysis ◽

Flow Rate ◽

Active Carbon ◽

Environmental Conditions ◽

Sulphur Dioxide ◽

Hydrogen Cyanide ◽

Carbon Surface ◽

Adsorption Model ◽

Active Centres

An ASC/T (Cu2+, Cr6+, Ag and triethylenediamine impregnated) Whetlerite activated carbon sample was exposed to a flow rate of 1 l/min, 0.746 mg/l SO2 in 80% RH air at 22°C for up to 510 min. Samples were subsequently challenged with 2 mg/l HCN in an identical diluent gas stream. Increasing SO2 exposure resulted in accelerated HCN and (CN)2 bed penetration. The basic shapes of the breakthrough profiles were however essentially unchanged. This observation is in accordance with numerical analysis of these results using Hinshelwood's adsorption model, which suggested that the adsorption rate constant was not significantly affected by SO2 but rather the pollutant exposure resulted in the number of active centres on the carbon surface being reduced and the effective bed depth of the sample being shortened. This loss in active centres was thought most likely to result from the reduction of Cr6+ to Cr3+.

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