RANS and PANEL method for unsteady flow propeller analysis

Gaggero, Stefano; Villa, Diego; Brizzolara, Stefano

doi:10.1016/s1001-6058(09)60253-5

Cited by 40 publications

(30 citation statements)

References 4 publications

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“…Relative error is 3.68%. But comparing with the literature [13], relative error of thrust is 4.29%, and relative error of torque is 0.57%. The error of thrust value is within 5%, and the two torque values are almost consistent.…”

Section: Analysis Of Unsteady Calculation Results Under the Oblique Flowmentioning

confidence: 57%

“…It shows that propeller load will increase in oblique flow. Additionally, the calculation results of RANS method from the literature [13,14] are also listed in Table 4. It can be seen that thrust calculation results in this paper are closer with the calculation results of the literature [14].…”

Section: Analysis Of Unsteady Calculation Results Under the Oblique Flowmentioning

confidence: 99%

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Numerical analysis of propeller exciting force in oblique flow

Wang

Sun

et al. 2017

J Mar Sci Technol

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Liquid densityInstantaneous value of velocity in j directionRelative pressureRelative inflow velocityOblique flow velocity Propeller rotation angular velocity Oblique flow angle Circumferential position of blade = Θ − arctanPropeller thrust coefficient Abstract CFD commercial software FLUENT, based on solving RANS equations, was used to calculate propeller hydrodynamic performance and exciting force. Sliding grid technique was applied to simulate the propeller rotation. Different advance coefficients and oblique inflow angles were set as different working conditions through adjusting inflow magnitude and direction. DTMB4679 propeller as the research object, hydrodynamic performance of this propeller in oblique flow was first calculated, and agreed well with test results. It verifies the accuracy of calculation method. The time-domain data of propeller exciting force under different working conditions was monitored, and then spectrum curve was obtained through fast Fourier transform. The results show that propeller load in oblique flow will aggravate, and transverse velocity component of oblique flow will cause great transverse force generated by propeller. Moreover, the smaller advance coefficient causes the greater peak of propeller fluctuating pressure. Additionally, oblique flow angle has a greater influence on unsteady bearing force than fluctuating pressure.

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Section: Analysis Of Unsteady Calculation Results Under the Oblique Flowmentioning

confidence: 57%

Section: Analysis Of Unsteady Calculation Results Under the Oblique Flowmentioning

confidence: 99%

Numerical analysis of propeller exciting force in oblique flow

Wang

Sun

et al. 2017

J Mar Sci Technol

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“…Using the Lighthill analogy, Proudmam proposed the following formula to compute the acoustic power of the turbulent flow, regardless of the average flow [36]. (5) In the above equation, u and l are the turbulence velocity and the length scale, respectively, while a 0 and α are the sound speed and a coefficient.…”

Section: Equations and Numerical Solutionmentioning

confidence: 99%

“…Unfortunately, these methods require complex laboratory equipment and are very expensive, especially when fluctuating quantities are to be measured. On the other hand, numerical simulations (making use of both inviscid [5][6][7][8][9][10] and viscous flow methods [11][12][13][14][15]) are also widely represented in the literature.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Tonal and Broadband Hydrodynamic Noises of Non-Cavitating Underwater Propeller

Mousavi

Rahrovi

Kheradmand

2014

Polish Maritime Research

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“…There are two commonly used methods for numerically studying propeller exciting forces under nonuniform ship's wake. One is that the propeller is simulated separately from the hull using measured ship's wake [3][4][5] or simulated ship wake as velocity inlet boundary condition. Here, the measured ship's wake usually 2 Shock and Vibration refers to the nominal wake because the effective wake is difficult to measure in experiments for now.…”

Section: Introductionmentioning

confidence: 99%

Numerical Studies of Propeller Exciting Bearing Forces under Nonuniform Ship’s Nominal Wake and the Influence of Cross Flows

Yao

Zhang

2017

Shock and Vibration

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Propeller exciting forces are the main causes of stern vibrations. In this paper, three-dimension exciting bearing forces of one blade and the whole propeller under nonuniform ship's wake were predicted, and the influence of cross flows on these exciting forces was studied. All simulations were carried out using a commercial solver, STAR-CCM+. To obtain the nominal wake for studying propeller exciting forces, flow field around a bare hull was simulated. Numerical results were widely validated by measured data, especially the velocity field at the propeller plane. Harmonic characteristics of the nonuniform ship's wake were studied. Then, a propeller under uniform inflow and nonuniform ship's wake with/without cross flows was simulated. Free-water surface and hull boundary were considered using a specially designed dummy stern. Results show that the influence of cross flows on propeller exciting forces is obvious. As for the exciting forces of one blade, the cross flows have greater influence on the axial force. As for the exciting forces of the whole propeller, the cross flows have greater influence on the transverse and vertical forces, and if the cross flows in ship's wake are not considered, the amplitudes of the main harmonics of transverse and vertical forces increase obviously.

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RANS and PANEL method for unsteady flow propeller analysis

Cited by 40 publications

References 4 publications

Numerical analysis of propeller exciting force in oblique flow

Numerical analysis of propeller exciting force in oblique flow

Numerical Simulation of Tonal and Broadband Hydrodynamic Noises of Non-Cavitating Underwater Propeller

Numerical Studies of Propeller Exciting Bearing Forces under Nonuniform Ship’s Nominal Wake and the Influence of Cross Flows

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