CFD Analysis of Flow Fields under Bow Bottom of Ships in Full-Scale

Abstract The MinWaterCSP project was defined with the aim of reducing the cooling system water consumption and auxiliary power consumption of concentrating solar power (CSP) plants. A full-scale, 24 ft (7.315 m) diameter model of the M-fan was subsequently installed in the Min WaterCSP cooling system test facility, located at Stellenbosch University. The test facility was equipped with an in-line torque arm and speed transducer to measure the power transferred to the fan rotor, as well as a set of rotating vane anemometers upstream of the fan rotor to measure the air volume flow rate passing through the fan. The measured results were compared to those obtained on the 1.542 m diameter ISO 5801 test facility using the fan scaling laws. The comparison showed that the fan power values correlated within +/− 7% to those of the small-scale fan, but at a 1° higher blade setting angle for the full-scale fan. To correlate the expected fan static pressure rise, a CFD analysis of the 24 ft (7.315 m) diameter fan installation was performed. The predicted fan static pressure rise values from the CFD analysis were compared to those measured on the 1.542 m ISO test facility, for the same fan. The simulation made use of an actuator disc model to represent the effect of the fan. The results showed that the predicted results for fan static pressure rise of the installed 24 ft (7.315 m) diameter fan correlated closely (smaller than 1% difference) to those of the 1.542 m diameter fan at its design flowrate but, once again, at approximately 1° higher blade setting angle.

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Wind tunnel tests on flow fields of full-scale railway wind barriers

Wind and Structures ◽

10.12989/was.2017.24.2.171 ◽

2017 ◽

Vol 24 (2) ◽

pp. 171-184 ◽

Cited By ~ 4

Author(s):

Yang Su ◽

Huoyue Xiang ◽

Chen Fang ◽

Lei Wang ◽

Yongle Li

Keyword(s):

Wind Tunnel ◽

Flow Fields ◽

Full Scale ◽

Wind Tunnel Tests

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CFD analysis of 3-D effects in scramjet exhaust flow fields

10.2514/6.1988-3262 ◽

1988 ◽

Author(s):

ROBERT RAY ◽

CHRIS NIGGEMEIER ◽

JOHN ERDOS

Keyword(s):

Flow Fields ◽

Cfd Analysis

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Model and full scale CFD analysis of propeller boss cap fins (PBCF)

Journal of Marine Science and Technology ◽

10.1007/s00773-012-0181-2 ◽

2012 ◽

Vol 17 (4) ◽

pp. 469-480 ◽

Cited By ~ 19

Author(s):

Takafumi Kawamura ◽

Kazuyuki Ouchi ◽

Takeo Nojiri

Keyword(s):

Full Scale ◽

Cfd Analysis

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CFD Analysis of Swirling Flow Fields Inaxisymmentric Gas Turbine Combuster

International Journal of Engineering Research and ◽

10.17577/ijertv6is010003 ◽

2016 ◽

Vol V6 (01) ◽

Author(s):

Mr. G Satheesh Kumar ◽

Mr. Harish Mugutkar ◽

Mrs. D Swetha ◽

Keyword(s):

Gas Turbine ◽

Swirling Flow ◽

Flow Fields ◽

Cfd Analysis

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CFD Analysis of Temperature Imbalance in Full Scale Tangentially Fired Coal Boiler

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.564.210 ◽

2014 ◽

Vol 564 ◽

pp. 210-215

Author(s):

Siti Sarah Ain Fadhil ◽

Hasril Hasini ◽

Mohd Nasharuddin Mohd Jaafar

Keyword(s):

Wall Temperature ◽

Loading Condition ◽

Full Scale ◽

Cfd Analysis ◽

Temperature Deviation ◽

Left Wall ◽

Electricity Power ◽

Higher Temperature ◽

Coal Boiler ◽

Load Conditions

Tangentially fired boilers are widely used in generating electricity power due to its advantage of distributing heat evenly to all furnace walls. However, this type of boiler poses common temperature deviation at the upper furnace which may lead to temperature imbalance. This consequently may reduce the performance of the boiler which cannot be simply ignored. This paper investigates the flow and temperature imbalance in a 700 MW coal-fired boiler at full load and reduced load conditions. The effect of loading condition towards the temperature imbalance is investigated. It is observed that temperature imbalance occurs at the reheater plane between left wall and right wall where higher temperature was found near the left wall. Temperature imbalance is influenced by the loading condition, the higher the loading the higher the imbalance.

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Evaluation of thermal environment by coupling CFD analysis and wireless-sensor measurements of a full-scale room with cooling system

Sustainable Cities and Society ◽

10.1016/j.scs.2018.12.011 ◽

2019 ◽

Vol 45 ◽

pp. 395-405 ◽

Cited By ~ 19

Author(s):

Xiaofang Shan ◽

Wei Xu ◽

Yi-Kuen Lee ◽

Wei-Zhen Lu

Keyword(s):

Thermal Environment ◽

Cooling System ◽

Full Scale ◽

Wireless Sensor ◽

Cfd Analysis

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CFD Analysis of Axial Thrust in Three Stages Centrifugal Pump at Design and Partload Conditions

Volume 1A: Symposia, Part 2 ◽

10.1115/ajkfluids2015-02272 ◽

2015 ◽

Author(s):

Hiroyoshi Watanabe ◽

Tetsuya Yamashita ◽

Satoshi Watanabe ◽

Yoshinori Hara

Keyword(s):

Centrifugal Pump ◽

Reverse Flow ◽

Side Wall ◽

Internal Flow ◽

Flow Fields ◽

Swirl Flow ◽

Cfd Analysis ◽

Axial Thrust ◽

Three Stages ◽

Thrust Forces

The performance, internal flow fields and fluid forces acted on the impellers and balance piston of three stages centrifugal pump at design and partload conditions are investigated by using URANS (Unsteady Reynolds Averaged Navier-Stokes) CFD analysis. In this study, investigations were concentrated on the details of the flow fields in the sidewall gaps of the impellers and at the impeller exit/diffuser inlet with the rotor axial offsets, and its effects on the thrust forces acting on the impeller, especially at the partload condition. From the details of flow field predicted by CFD, the mechanisms of change of axial thrust forces with the rotor axial offsets are as follows. The overwrap between the impeller shroud wall and diffuser casing wall becomes smaller by the axial offsets at the opposite side of axial offset direction, this makes the flow to leak out easier from the impeller side into the side wall gaps there. As a result, the interaction between the swirl flow in the side wall gap and reverse flow from the diffuser become stronger. The strong inward flow in the front side wall gap induced by the diffuser reverse flow works as a swirl breaker weakening the swirl flow in the gap. The pressure distributions in the side wall gaps are affected by these changes of swirl flow in the gap and the axial thrust forces working on the rotor are changed. The predicted change of axial thrust forces with the rotor axial offsets show good agreement with the experimental values.

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