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Johan Bosschers

Senior Researcher

Research & Development

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Publications
Paper
Prediction of underwater radiated noise from propeller cavitation during concept design

17 Oct 2022

There is growing concern about the impact of underwater radiated noise (URN) on marine life. One of the main sources of URN of ships is propeller ...
Paper
Predicting the higher-order harmonics of propeller-induced hull-pressure fluctuations by tip-vortex cavitation

17 Oct 2022

Cavitating propellers generate pressure fluctuations on the hull of the ship and emit underwater sound. These pressure fluctuations are usually ...
Paper
The SOUNDS project: towards effective mitigation of underwater noise from shipping in Europe

20 Jun 2022

Continuous underwater noise from shipping has been identified as one of the main contributors to ambient noise levels in the oceans. Notwithstanding ...
Paper
Predicting cavitating propeller noise in off-design conditions using scale-resolving CFD simulations

15 Jun 2022

There is increasing awareness about the harmful impact of underwater radiated noise of shipping on the marine environment, with propeller cavitation ...
Paper
Broadband Trailing-Edge Noise Predictions using Incompressible Large Eddy Simulations

14 Jun 2022

Incompressible large eddy simulations of the flow over an airfoil at high Reynolds number and low Mach number have been performed, including ...
Paper
Progress in the prediction and mitigation of propeller cavitation noise and vibrations

16 Nov 2020

Comfort on board passenger vessels and pleasure craft is a primary design consideration. Furthermore, underwater radiated noise from vessels is ...
Paper
The Effect of Reynolds Number on a Developed Tip-Vortex Cavity and its Radiated Noise

19 Oct 2020

It is well known that the inception of tip-vortex cavitation on wings and ship propellers is delayed in model tests when compared to sea trials due ...
Paper
Advances in design and analysis of ducted propellers for dredging vessels

22 Sep 2019

This paper addresses the challenges and advances made in the hydro-dynamic design and design evaluation of ducted propellers. The application of new ...
Magazine
Risk reduction by cavitation control

1 Jun 2019

Reading time 9 minutes

As all kinds of stakeholders regarding cavitation-related issues are represented in CRS, cavitation has been a major research topic through the CRS ...
Magazine
Propulsion design

1 Jun 2019

Reading time 9 minutes

In the year 2030, the French Naval Architect Monique Lorand was tasked to optimise a preliminary ship design in only 24 hours - a task deemed ...
Paper
Validation studies of a boundary element method for ducted propellers

26 May 2019

This paper provides an overview of several validation studies that were carried out for a Boundary Element Method (BEM) for ducted propellers. These ...
Paper
Recent Developments in Computational Methods for the Analysis of Ducted Propellers in Open Water

5 Aug 2018

This paper presents an overview of the recent developments at IST and MARIN in applying computational methods for the hydrodynamic analysis of ...
Paper
A semi-empirical prediction method for broadband hull-pressure fluctuations and underwater radiated noise by propeller tip vortex cavitation

2 May 2018

A semi-empirical method is presented that predicts broadband hull-pressure fluctuations and underwater radiated noise due to propeller tip vortex ...
Paper
Prediction of the Open-Water Performance of Ducted Propellers with a Panel Method

19 Mar 2018

In the present work, a comparison between the results obtained by a panel code with a Reynolds-averaged Navier-Stokes (RANS) code is made to obtain ...
Paper
Validation of underwater radiated noise predictions for a merchant vessel using full-scale measurements

27 Aug 2017

Underwater radiated noise (URN) was previously primarily of interest in connection with the signature of naval vessels. Recently it has become ...
Magazine
Supporting silent ships - measuring underwater radiated noise from cavitating ship propellers

17 Aug 2017

Reading time 6 minutes

Have you ever had problems talking to someone in a noisy environment such as a busy restaurant? The same happens to marine animals, which use sound ...
Paper
A semi-empirical method to predict broadband hull pressure fluctuations and underwater radiated noise by cavitating tip vortices

12 Jun 2017

A semi-empirical method is presented that predicts broadband hull pressure fluctuations and underwater radiated noise due to propeller tip vortex ...
Paper
Validation of computational and experimental prediction methods

4 Sep 2016

Validation of computational and experimental prediction methods for the underwater radiated noise of a small research vesselModel tests and ...
Magazine
Accurate predictions for noise levels of cavitating propellers now possible

19 Aug 2016

Reading time 6 minutes

As underwater radiated noise levels in the oceans increases, MARIN has investigated just how much cavitating propellers are to blame.
Paper
Suppression Of underwater Noise Induced by Cavitation - SONIC

18 Apr 2016

In EU FP7 project SONIC, partners set out in October 2012 to study the underwater radiated noise of ships and shipping. The objectives of the ...
Paper
Acoustic Reverberation Measurements in the Depressurized Wave Basin

1 Oct 2015

One method to determine the underwater radiated noise (URN) of the cavitating propeller of a ship is to perform model tests in a cavitation test ...
Paper
Influence Of Local And Adaptive Mesh Refinement On The Tip Vortex Characteristics Of A Wing And Propeller

15 Jun 2015

Two different methods to obtain nearly grid independent solutions for tip vortex flow were tested for a wing and a propeller.
Paper
Computational and Experimental Prediction of Propeller Cavitation Noise

21 May 2015

Computational and experimental methods for the prediction of underwater-radiated noise due to propeller cavitation as in use at MARIN are discussed ...
Paper
Underwater Radiated Noise Measurements for a Cruise Ferry

25 Oct 2013

Inboard noise and underwater radiated noise are becoming more and more important factors during the design of ships. Model tests are often used to ...
Paper
Underwater radiated noise measurements with a silent towing carriage in the depressurized wave basin

1 Sep 2013

0
Because of the increasing interest in underwater radiated noise levels of ships, noise mitigation measures have been applied to the new secondary ...
Paper
Numerical simulation of propeller-hull interaction and determination of the effective wake field using a hybrid RANS-BEM approach

5 May 2013

In this study propeller-hull interaction is investigated numerically using a combination of a steady viscous CFD method (RANS) for the ship flow and ...
Paper
A Comparison of Panel Method and RANS Calculations for a Ducted Propeller System in Open-Water

5 May 2013

In this paper, a comparison between results of a panel method and a RANS solver is made for a ducted propeller system in open-water. The panel ...
Paper
Scale effects on hull pressure fluctuations due to cavitating propellers

1 Oct 2012

In this paper we describe several scale effects that may occur on cavitating propellers and the resulting (low-frequency) hull pressure ...
Paper
Analysis of scale effects in ship powering performance using a hybrid RANS-BEM approach

27 Aug 2012

This paper discusses scale effects in ship powering performance using a hybrid RANS-BEM approach. The propeller action is included in the viscous ...
Paper
Investigation of Hull Pressure Pulses, Making Use of Two Large Scale Cavitation Test Facilities

13 Aug 2012

The well-known ship model basins MARIN of The Netherlands and HSVA of Germany have joint forces to investigate the problem of the occasional ...
Magazine
Silence is golden... especially underwater

20 Apr 2012

Reading time 3 minutes

MARIN introduces a new silent towing carriage in a bid to further the industry's knowledge about underwater-radiated noise.
Paper
Open-Water Thrust and Torque Predictions of a Ducted Propeller System With a Panel Method

15 Jun 2011

This paper discusses several modelling aspects which are important for the performance predictions of a ducted propulsor with a low-order Panel ...
Paper
On Predicting Cavitation-Induced Hull Pressure Fluctuations - Wake Scale Effects And Signal Variability

24 Nov 2010

This paper presents research efforts currently made to incorporate the influence of wake scaling and signal variability in scale model experiments ...
Paper
On the influence of viscous effects on 2-D cavitating vortices

11 Oct 2010

This paper describes the influence of viscous effects on an axisymmetric cavitating vortex in 2-D viscous incompressible flow for steady and ...
Paper
Modeling and analysis of a cavitating vortex in 2D unsteady viscous flow

17 Aug 2009

Two models, of which one analytical and the other computational, have been developed to describe an axisymmetric cavitating vortex in ...
Paper
Computation of hull-pressure fluctuations due to non-cavitating propellers

24 Jun 2009

This paper describes a new coupling procedure of two boundary element methods aimed at computing propellerinduced hull-pressure fluctuations. The ...
Paper
Investigation of hull pressure fluctuations generated by cavitating vortices

22 Jun 2009

The paper describes an ongoing research program at MARIN for the investigation of low frequency hull pressure fluctuations caused by cavitating ...
Paper
Investigation of the resonance frequency of a cavitating vortex

24 Apr 2009

The cavitation pattern of a modern ship propeller is often characterized by a cavitating vortex. This cavitating vortex generates low frequency hull ...
Paper
Model Scale Measurements of Surface Ship Radiated Flow Noise

24 Mar 2009

Advances in weapon and sensor capabilities are driving an increased interest in the control of underwater signatures of naval platforms. The control ...
Magazine
Surface Ship Radiated Flow Noise project completed

29 Jan 2009

Reading time 3 minutes

Advances in weapon and sensor capabilities are driving an increased interest in the control of underwater signatures of naval platforms.
Paper
Similarity solutions for viscous cavitating vortices

1 Dec 2008

Theoretical analysis of the dynamic behavior of cavitating vortices requires knowledge of the velocity distribution in the vortex core. For that ...
Paper
Analysis of inertial waves on inviscid cavitating vortices in relation to low-frequency radiated noise

7 Jul 2008

The dispersion relation of inertial waves on inviscid cavitating vortices ('Kelvin waves') is reconsidered and extended to include the influence of ...
Paper
Similarity solutions for viscous cavitating vortex cores

7 Jul 2008

Theoretical analysis of the dynamic behavior of cavitating vortices requires knowledge of the velocity distribution in the vortex core. For that ...
Paper
Computational Analysis of Propeller Sheet Cavitation and Propeller Ship Interaction

26 Mar 2008

This paper describes a computational procedure which is being developed for the practical analysis of propeller sheetcavitation and propeller-ship ...
Magazine
PROCAL beats the panel!

17 Oct 2007

Reading time 6 minutes

With the increase in fuel prices, interest in efficient ship propulsors is rapidly growing but the last couple of decades an opposite trend also can ...
Paper
Broadband hull pressure fluctuations and cavitating vortices - an investigation of resonance frequencies

9 Sep 2007

This paper presents new findings obtained in an ongoing research program at MARIN, which concerns cavitating tip vortices on ship propellers and the ...
Paper
Achievements and challenges in cavitation research on ship propellers

9 May 2007

Cavitation occurs on nearly all ship propellers. It may lead to expensive problems if not acknowledged in an early design stage. The two most ...
Paper
Cavitation Research On Ship Propellers - A Review Of Achievements And Challenges

1 Sep 2006

This paper reviews cavitation research on ship propellers performed in the recent past in MARIN’s Depressurized Towing Tank and cavitation tunnels. ...
Paper
Modelling of three dimensional sheet cavitation on marine propellers using a boundary element method

1 Sep 2006

The current paper presents results of a research programmededicated to the analysis of cavitating marine propellers using Boundary Element Methods. ...
Paper
Influence of the reduced frequency on the 2-D partial sheet cavitation behaviour for a foil in a gust

1 Sep 2006

ABSTRACT This paper presents a numerical study of the influence of the reduced frequency on the 2-D partial sheet cavitation behaviour for a foil ...
Paper
A verification study on low-order three-dimensional potential-based panel codes

9 Jan 2006

A verification study of two different panel codes for three-dimensional potential flow is performed by grid convergence studies. The two codes used ...
Paper
A study on the modeling of marine propeller tip flows using BEM

4 Jul 2005

It has been recognized that Boundary Element Methods (BEM) are able to predict the pres-sure distribution in the steady case with reasonable ...
Paper
Surface ship underwater radiated flow noise

21 Jun 2005

An increasing focus on naval operations in littoral waters and the advances in weapon and sensor capabilities are driving an increased interest in ...
Paper
Validation of a BEM for modelling steady sheet cavitation on marine propellers

1 Jun 2005

The current paper presents results obtained with a 3-D boundary element method which is being developed for the analysis of cavitating marine ...
Paper
Aspects of the cavitating propeller tip vortex as a source of inboard noise and vibration

1 Jan 2005

This paper surveys fluid dynamic-acoustic mechanisms that may explain low-frequent, broadband hull excitation experienced on board of ships and ...
Paper
Unsteady effects in 2D modelling of partial cavitation using BEM

1 Jan 2004

The authors have developed 2D steady and unsteady models for partial sheet cavitation analysis based on the Boundary Element Method (BEM). Using ...

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