Numerical prediction of sheet cavitation on marine propellers using CFD simulation with transition-sensitive turbulence model

Helal, Mohamed M.; Ahmed, T.M.; Banawan, Adel A.; Kotb, Mostafa

doi:10.1016/j.aej.2018.03.008

Cited by 25 publications

(10 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…If the cavitation number is high, the formation of cavitation bubbles becomes very aggressive. This hypothesis was based on research in previous studies stating that P v , C p, l , L, and ρ v play important roles as the primary physical properties that cause cavitation [29]. If cavitation is defined as a decrease in environmental underwater vapor pressure, then the ratio between water vapor pressure and reference pressure becomes inversely proportional.…”

Section: Observation Resultsmentioning

confidence: 99%

“…Based on the given advance coefficient value, a specific cavitation flow was set depending on cavitation number σ n . The cavitation number σ n and pressure coefficient c p can be defined as follows [29]:…”

Section: Cavitation Calculationsmentioning

confidence: 99%

“…After convergence, there were 7,301,426 elements and 2,275,988 nodes for the element mesh rotating domain and 2,452,774 elements and 417,994 nodes for the fixed domain. The y + value can be defined with the following equation [29]:…”

Section: Meshingmentioning

confidence: 99%

See 2 more Smart Citations

Cavitation Prediction of Ship Propeller Based on Temperature and Fluid Properties of Water

Yusvika

Prabowo

Tjahjana

et al. 2020

JMSE

View full text Add to dashboard Cite

Cavitation is a complex phenomenon to measure, depending on site conditions in specific regions of the Earth, where there is water with various physical properties. The development of ship and propulsion technology is currently intended to further explore territorial waters that are difficult to explore. Climate differences affect the temperature and physical properties of water on Earth. This study aimed to determine the effect of cavitation related to the physical properties of water. Numerical predictions of a cavitating propeller in open water and uniform inflow are presented with computational fluid dynamics (CFD). Simulations were carried out using Ansys. Numerical simulation based on Reynolds-averaged Navier–Stokes equations for the conservative form and the Rayleigh–Plesset equation for the mass transfer cavitation model was conducted with turbulent closure of the fully turbulent K-epsilon (k-ε) model and shear stress transport (SST). The influence of temperature on cavitation extension was investigated between 0 and 50 ° C . The results obtained showed a trend of cavitation occurring more aggressively at higher water temperature than at lower temperature.

show abstract

Section: Observation Resultsmentioning

confidence: 99%

Section: Cavitation Calculationsmentioning

confidence: 99%

See 1 more Smart Citation

Cavitation Prediction of Ship Propeller Based on Temperature and Fluid Properties of Water

Yusvika

Prabowo

Tjahjana

et al. 2020

JMSE

View full text Add to dashboard Cite

show abstract

“…Depending on the cavitation number, a particular cavitation flow was denoted as σn. The cavitation number σn and pressure coefficient cp can be defined as following equations [14]:…”

Section: A Cavitation Mechanismmentioning

confidence: 99%

Cavitation Analysis of Kaplan-Series Propeller: Effect of Pitch Ratio and nProp using CFD

Arifin

Felayati

2021

IJMEIR

View full text Add to dashboard Cite

⎯ ⎯ cavitation is defined as a phenomenon or action of the traveling bubbles that pass through the hydrofoil in which the reduction of pressure below the liquid's vapor pressure leads to the formation of small vapor bubbles (or cavities) caused by the dynamic pressure of the propeller blades. It caused some effects on the propeller of the ship i.e. it can greatly reduce a ship's propelling efficiency, damaged propeller material or blade erosion, vibration, and disturbance noises. Cavitation can be minimized by proper attention regarding the design of the propellers and variation of propeller variables parameters. For that reason, this research conducts a cavitation analysis on the Kaplan-Series of the CPP by varying P/Db=0.4, P/Db=0.6, and P/Db=0.8; also the rotational speed of the propeller (nProp) i.e. 125 rpm, 175 rpm and, 225 rpm. The numerical analysis was made based on the Computational Fluid Dynamic Method (CFD) to calculate the pressure ratio (ΔP) and percentages of the cavitation area (Rs) due to a configuration of the propellers parameter. The simulation consists of the 3 steps; pre-processor, solver manager, and post-processor. The result shows that the value of the pressure ratio increased significantly at the higher P/Db and nProp. Also, the variation of P/Db and nProp has a significant effect on the development of Rs (%) at the higher P/Db and nProp.Keywords⎯cavitation, computational fluid dynamic, CPP, kaplan-series propeller, nProp, pitch ratio.

show abstract

“…According to incomplete statistics, time for meshing, which is the primary task of numerical calculation, accounts for over 60% of the entire numerical calculation process. In general, the calculation error can be controlled by refined meshing [31][32][33].…”

Section: Meshing Scheme and Grid Independence Verificationmentioning

confidence: 99%

Influence of wall roughness on cavitation performance of centrifugal pump

Hou

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Cavitation is a phenomenon that occurs easily during rotation of fluid machinery and can decrease the performance of a pump, thereby resulting in damage to flow passage components. To study the influence of wall roughness on the cavitation performance of a centrifugal pump, a three-dimensional model of internal flow field of a centrifugal pump was constructed and a numerical simulation of cavitation in the flow field was conducted with ANSYS CFX software based on the Reynolds normalization group k-epsilon turbulence model and Zwart cavitation model. The cavitation can be further divided into four stages: cavitation inception, cavitation development, critical cavitation, and fracture cavitation. Influencing laws of wall roughness of the blade surface on the cavitation performance of a centrifugal pump were analyzed. Research results demonstrate that in the design process of centrifugal pumps, decreasing the wall roughness appropriately during the cavitation development and critical cavitation is important to effectively improve the cavitation performance of pumps. Moreover, a number of nucleation sites on the blade surface increase with the increase in wall roughness, thereby expanding the low-pressure area of the blade. Research conclusions can provide theoretical references to improve cavitation performance and optimize the structural design of the pump.

show abstract

Numerical prediction of sheet cavitation on marine propellers using CFD simulation with transition-sensitive turbulence model

Cited by 25 publications

References 6 publications

Cavitation Prediction of Ship Propeller Based on Temperature and Fluid Properties of Water

Cavitation Prediction of Ship Propeller Based on Temperature and Fluid Properties of Water

Cavitation Analysis of Kaplan-Series Propeller: Effect of Pitch Ratio and nProp using CFD

Influence of wall roughness on cavitation performance of centrifugal pump

Contact Info

Product

Resources

About