Predicting cavitating propeller noise in off-design conditions using scale-resolving CFD simulations

Lidtke, Artur Konrad; Lloyd, T.; Lafeber, Frans Hendrik; Bosschers, Johan

doi:10.1016/j.oceaneng.2022.111176

Cited by 26 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2021 and Lidtke et al. 2022, where also similar or more significant deviations were found). Therefore, the results in figure 20 compare well with similar studies in the literature and can serve as a useful reference to assess the performance of high-fidelity simulations in matching acoustic measurements.…”

Section: Resultssupporting

confidence: 52%

“…In particular, the deviations across experiments were often above the values of 20 dB shown in figure 20. It should also be noted that comparisons between experiments and computations on the noise from marine propellers were rarely reported in the literature (for a few exceptions see Bensow & Liefvendahl 2016, Ebrahimi, Seif & Nouri-Borujerdi 2019, Sezen et al 2020, Sezen, Atlar & Fitzsimmons 2021a, Kimmerl et al 2021and Lidtke et al 2022, where also similar or more significant deviations were found). Therefore, the results in figure 20 compare well with similar studies in the literature and can serve as a useful reference to assess the performance of high-fidelity simulations in matching acoustic measurements.…”

Section: Comparisons With the Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Hydroacoustic analysis of a marine propeller using large-eddy simulation and acoustic analogy

et al. 2022

View full text Add to dashboard Cite

The acoustic analogy is adopted to characterise the signature of a seven-bladed submarine propeller, relying on a high-fidelity large-eddy simulation, performed on a computational grid consisting of 840 million points. Results demonstrate that the nonlinear terms of the Ffowcs-Williams and Hawkings equation quickly become dominant moving away from the propeller along the direction of its wake development. While the linear terms experience a decay moving downstream, the nonlinear terms grow in the near wake, as a result of the development of wake instability. In particular, this growth affects frequencies lower than the blade frequency. Therefore, the acoustic signature of the propeller is mainly tonal in the near field only, due to the thickness and loading components of noise from the surface of the propeller and the periodic perturbation caused by its tip vortices. They develop instability at a faster rate, compared with the hub vortex, triggering the process of energy cascade towards higher frequencies and contributing in this way to broadband noise.

show abstract

Section: Resultssupporting

confidence: 52%

Section: Comparisons With the Experimentsmentioning

confidence: 99%

Hydroacoustic analysis of a marine propeller using large-eddy simulation and acoustic analogy

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Similar to a signal-to-noise ratio for CFD simulations [12] the areas of differences between the pressure pulses for the non-cavitating and cavitating case are indicated on the same hull patch in Figure 6a and the spectral representation at the center of the patch in Figure 6b for RANS. Overall, the cavitating condition produces more noise, which is the expected trend.…”

Section: Pressure Pulsesmentioning

confidence: 94%

“…The same methods are applied to more complex cases e.g., cases with obstacles in the propeller slipstream such as lifting surfaces similar to rudders [8] or complete ship propeller configurations [9,10], where on the one side the influence of the vessel wake has to be considered and on the other hand the propagation of the propeller slipstream and its interaction with a rudder. The results increase the confidence in these methods for acoustic analysis, which may be enhanced by improved convergence criteria for monitored flow simulation and acoustic quantities, with statistical methods such as the transient scanning technique [11], and with signal-to-noise ratio analyses of the obtained sound signal [12] analyzed for the off-design operation of propulsion units.…”

Section: Introductionmentioning

confidence: 90%

Visualization of Underwater Radiated Noise in the Near- and Far-Field of a Propeller-Hull Configuration Using CFD Simulation Results

Kimmerl

Abdel‐Maksoud

2023

JMSE

View full text Add to dashboard Cite

Underwater radiated noise is part of the anthropogenic emissions into the environment and as such a pressing problem for the preservation of the marine ecosystem. In order to direct attention to the most relevant noise sources associated with ships it is crucial to precisely determine the local origins of the acoustic emissions. As acoustics are by nature perceived through a very subjective auditory perception, visual post-processing support is required in engineering applications to assess the impact on structures and to create an understanding of the overall noise field geometrically, topologically, and directionally. In the context of CFD simulations, this may be achieved by considering the pressure pulses on domain boundary surfaces or passive surfaces, or by evaluating various volumetric information, such as Proudman acoustic sources or the Lighthill stress tensor, which is the fundamental input for many acoustic analogies including the Ffowcs-Williams-Hawkings method. For a propeller-hull configuration, the acoustic emissions from modeled and scale-resolved turbulence two-phase CFD analyses are evaluated in detail with different visualization methods. It is shown that the spatial distribution information of frequency domain pressure pulses, and the corresponding complex phase angles on specific passive geometries, as well as the Lighthill stress tensor may be utilized to create a better understanding of underwater acoustics. This allows the identification of source types and their respective excitation of the hull and emission characteristics of the hydrodynamic sources into the fluid domain, as well as the effect of the CFD simulation domain geometry extent.

show abstract

“…The maximum under-prediction in this range was about 28 dB at 72 Hz, and at frequencies above 200 Hz, the broadband noise became more and more under-predicted with increasing frequency. Lidtke et al [26] performed scale-resolving CFD simulations to predict cavitating propeller noise in off-design conditions. They found that accurately modeling a wide range of frequencies, including tonal and broadband components, was still challenging for scale-resolving simulations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of cavitation noise using Eulerian-Lagrangian multiscale modeling

Niu

Wei

et al. 2023

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

Predicting cavitating propeller noise in off-design conditions using scale-resolving CFD simulations

Cited by 26 publications

References 18 publications

Hydroacoustic analysis of a marine propeller using large-eddy simulation and acoustic analogy

Hydroacoustic analysis of a marine propeller using large-eddy simulation and acoustic analogy

Visualization of Underwater Radiated Noise in the Near- and Far-Field of a Propeller-Hull Configuration Using CFD Simulation Results

Investigation of cavitation noise using Eulerian-Lagrangian multiscale modeling

Contact Info

Product

Resources

About