The Resistance Simulation of the Y550 Yacht

For the model test and simulation analysis will make combined research,according to the computational fluid dynamics theory based on the ship model test,through to the Y550 yacht do resistance simulation, obtain the Y550 the distribution of flow field in the different pressure and speed,finally obtain the resistance simulation data of the Y550 in static water.

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Simulation Analysis on Navigation Indexes of Wanzhou Yangtze River Highway Bridge after the Anti-Collision Device Construction by Ship Model Test

Engineering ◽

10.4236/eng.2016.811072 ◽

2016 ◽

Vol 08 (11) ◽

pp. 806-814

Author(s):

Kui Yu ◽

Chao Tao ◽

Xuequan Chu ◽

Xiqin Ma

Keyword(s):

Model Test ◽

Yangtze River ◽

Simulation Analysis ◽

Highway Bridge ◽

Ship Model ◽

Ship Model Test

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Optimal Design of a Tower Type SCR-deNOx Facility for a 1000 MW Coal-Fired Power Plant Based on CFD Simulation and FMT Validation

Applied Sciences ◽

10.3390/app9051012 ◽

2019 ◽

Vol 9 (5) ◽

pp. 1012 ◽

Cited By ~ 2

Author(s):

Haojun Zeng ◽

Jingqi Yuan ◽

Jingcheng Wang

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Power Plant ◽

Optimal Design ◽

Flow Field ◽

Model Test ◽

Flow Model ◽

Homogeneous Distribution ◽

Spatial Constraints ◽

Ammonia Injection

Selective catalytic reduction (SCR) is one of the most efficient methods to reduce NOx emissions from coal-fired power plants. This paper deals with an optimal design tower type SCR-deNOx facility for a 1000 MW coal-fired power plant. Combined with computational fluid dynamics (CFD), the configuration of the baffles geometry was studied with spatial constraints. Flow field was regulated at the ammonia injection grid (AIG) with the dual aim of reducing difficulties in implementing the non-uniformed ammonia (NH3) injection strategy and achieving a more homogeneous distribution at the catalyst entrance. A flow model test (FMT) was carried out at a laboratory scale to verify the design results. The results of the flow model test are in good agreement with the computational fluid dynamics. It is indicated that small-sized baffles are recommended for installation at the upstream side of the facility as the optimal design and ability to regulate the flow field at the ammonia injection grid makes it an effective way to deal with spatial constraints. This paper provides a good reference for optimizing the tower type SCR-deNOx facilities with spatial constraints.

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Construction Ventilation Scheme Optimization of Underground Main Powerhouse Based on CFD

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.368-370.619 ◽

2013 ◽

Vol 368-370 ◽

pp. 619-623

Author(s):

Zhen Liu ◽

Xiao Ling Wang ◽

Ai Li Zhang

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Flow Field ◽

Air Flow ◽

Scheme Optimization ◽

Pressure Distributions ◽

Air Volume ◽

Computational Fluid Dynamics Cfd ◽

Traditional Construction ◽

Ventilation Scheme

For the purpose of avoiding the deficiency of the traditional construction ventilation, the ventilation of the underground main powerhouse is simulated by the computational fluid dynamics (CFD) to optimize ventilation parameters. A 3D unsteady RNG k-ε model is performed for construction ventilation in the underground main powerhouse. The air-flow field and CO diffusion in the main powerhouse are simulated and analyzed. The two construction ventilation schemes are modelled for the main powerhouse. The optimized ventilation scheme is obtained by comparing the air volume and pressure distributions of the different ventilation schemes.

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Effect of Doppler flow meter position on discharge measurement in surcharged manholes

Water Science & Technology ◽

10.2166/wst.2017.563 ◽

2017 ◽

Vol 77 (3) ◽

pp. 647-654 ◽

Cited By ~ 1

Author(s):

Haoming Yang ◽

David Z. Zhu ◽

Yanchen Liu

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Flow Field ◽

Flow Regimes ◽

Flow Meter ◽

Flow Meters ◽

Flow Discharge ◽

Doppler Flow ◽

Sewer Systems ◽

Computational Fluid Dynamics Cfd

Abstract Determining the proper installation location of flow meters is important for accurate measurement of discharge in sewer systems. In this study, flow field and flow regimes in two types of manholes under surcharged flow were investigated using a commercial computational fluid dynamics (CFD) code. The error in measuring the flow discharge using a Doppler flow meter (based on the velocity in a Doppler beam) was then estimated. The values of the corrective coefficient were obtained for the Doppler flow meter at different locations under various conditions. Suggestions for selecting installation positions are provided.

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The Effect of Different Turbulence Models on the Emitter Discharge by Using Computational Fluid Dynamics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.662.586 ◽

2013 ◽

Vol 662 ◽

pp. 586-590

Author(s):

Gang Lu ◽

Qing Song Yan ◽

Bai Ping Lu ◽

Shuai Xu ◽

Kang Li

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Flow Field ◽

Turbulence Models ◽

Experimental Results ◽

Turbulent Model ◽

Simulation Results ◽

Rsm Model ◽

Dynamics Method ◽

Emitter Discharge

Four types of Super Typhoon drip emitter with trapezoidal channel were selected out for the investigation of the flow field of the channel, and the CFD (Computational Fluid Dynamics) method was applied to simulate the micro-field inside the channel. The simulation results showed that the emitter discharge of different turbulent model is 4%-14% bigger than that of the experimental results, the average discharge deviation of κ-ω and RSM model is 5, 4.5 respectively, but the solving efficiency of the κ-ω model is obviously higher than that of the RSM model.

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Numerical Investigation of Thermal Flow Field of Air-Cooled Condensers for Yongshou Plant

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.248.391 ◽

2012 ◽

Vol 248 ◽

pp. 391-394

Author(s):

Wen Zhou Yan ◽

Wan Li Zhao ◽

Qiu Yan Li

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Wind Speed ◽

Power Plant ◽

Flow Field ◽

Wind Direction ◽

Rotational Speed ◽

Power Plants ◽

Thermal Flow ◽

Air Cooled Condensers

By using the computational fluid dynamics code, FLUENT, Numerically simulation is investigated for Youngshou power plant. Under the constant ambient temperature, the effects of different wind speed and wind direction on the thermal flow field are qualitatively considered. It was found that when considering about the existing and normally operating power plants, the thermal flow field is more sensitive to wind direction and wind speed. Based on the above results, three improved measures such as: increasing the wind-wall height and accelerating the rotational speed of the fans near the edge of the ACC platform and lengthen or widen the platform are developed to effectively improving the thermal flow field, and enhanced the heat dispersal of ACC.

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EFD and CFD Study of Forces, Ship Motions, and Flow Field for KRISO Container Ship Model in Waves

Journal of Ship Research ◽

10.5957/jsr.2020.64.1.61 ◽

2020 ◽

Vol 64 (01) ◽

pp. 61-80

Author(s):

Ping-Chen Wu ◽

Md. Alfaz Hossain ◽

Naoki Kawakami ◽

Kento Tamaki ◽

Htike Aung Kyaw ◽

...

Keyword(s):

Fluid Dynamics ◽

Flow Field ◽

Flow Simulation ◽

Wake Flow ◽

Ship Motions ◽

Container Ship ◽

Added Resistance ◽

Ocean Engineering ◽

Ship Model ◽

Calm Water

Ship motion responses and added resistance in waves have been predicted by a wide variety of computational tools. However, validation of the computational flow field still remains a challenge. In the previous study, the flow field around the Korea Research Institute for Ships and Ocean Engineering (KRISO) Very Large Crude-oil Carrier 2 tanker model with and without propeller condition and without rudder condition was measured by the authors, as well as the resistance and self-propulsion tests in waves. In this study, the KRISO container ship model appended with a rudder was used for the higher Froude number .26 and smaller block coefficient .65. The experiments were conducted in the Osaka University towing tank using a 3.2-m-long ship model for resistance and self-propulsion tests in waves. Viscous flow simulation was performed by using CFDShip-Iowa. The wave conditions proposed in Computational Fluid Dynamics (CFD) Workshop 2015 were considered, i.e., the wave-ship length ratio λ/L = .65, .85, 1.15, 1.37, 1.95, and calm water. The objective of this study was to validate CFD results by Experimental Fluid Dynamics (EFD) data for ship vertical motions, added resistance, and wake flow field. The detailed flow field for nominal wake and self-propulsion condition will be analyzed for λ/L = .65, 1.15, 1.37, and calm water. Furthermore, bilge vortex movement and boundary layer development on propeller plane, propeller thrust, and wake factor oscillation in waves will be studied.

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CFD Leakage Predictions of Unworn and Worn Labyrinth Seals With and Without Tooth Axial Offset

Volume 5B: Heat Transfer ◽

10.1115/gt2017-63163 ◽

2017 ◽

Author(s):

Hasham H. Chougule ◽

Alexander Mirzamoghadam

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Numerical Modeling ◽

Steady State ◽

Flow Field ◽

Labyrinth Seals ◽

Small Clearance ◽

Total Leakage ◽

Computational Fluid Dynamics Cfd ◽

Flow Deflection

The objective of this study is to develop a Computational Fluid Dynamics (CFD) based methodology for analyzing and predicting leakage of worn or rub-intended labyrinth seals during operation. The simulations include intended tooth axial offset and numerical modeling of the flow field. The purpose is to predict total leakage through the seal when an axial tooth offset is provided after the intended/unintended rub. Results indicate that as expected, the leakage for the in-line worn land case (i.e. tooth under rub) is higher compared to unworn. Furthermore, the intended rotor/teeth forward axial offset/shift with respect to the rubbed land reduces the seal leakage. The overall leakage of a rubbed seal with axial tooth offset is observed to be considerably reduced, and it can become even less than a small clearance seal designed not to rub. The reduced leakage during steady state is due to a targeted smaller running gap because of tooth offset under the intended/worn land groove shape, higher blockages, higher turbulence and flow deflection as compared to worn seal model without axial tooth offset.

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