Johan Bosschers
senior researcher
Defence
Powering & Signatures
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Publications
Paper
A procedure for estimating mitigation effect of air injection on ship underwater radiated noise
25 Aug 2024
Increasing evidence exists that underwater radiated noise from ships has a negative impact on marine ecosystems. This has led to initiatives aimed ...
Paper
Numerical and Experimental Investigation of the Tip Vortex Flow Induced by an Elliptical Foil
8 Jul 2024
This collaborative paper within the AVT-320 joint research activity compares Computational Fluid Dynamics (CFD) results from diverse methods across ...
Paper
PIANO: A physics-based semi-empirical source level model for fleet-scale ship URN prediction
17 Mar 2024
Concern is growing about the impacts of continuous underwater radiated noise (URN) from ships on marine fauna. In anticipation of future regulation ...
Paper
Ship URN mitigation by air injection: model-scale experiments and application to full-scale measurement data
17 Mar 2024
It is recognised that continuous underwater radiated noise (URN) from shipping needs to be mitigated in order to minimise impact on marine animals. ...
Paper
Scale Model Measurements of Ship Machinery Noise Mitigation by Air Injection
24 Oct 2023
Underwater radiated noise (URN) from shipping is a main contributor to the rising noise levels in the oceans. There is growing evidence that this ...
Paper
Estimation of the underwater radiated noise by ship propeller cavitation using onboard sensor
9 Jul 2023
The use of onboard sensors to estimate the source levels of the underwater radiated noise (URN) of propeller cavitation of a research vessel is ...
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
Marine propeller shaft loading analysis in moderate oblique-flow conditions
15 Oct 2022
Shaft loads of marine propellers in noncavitating oblique-flow conditions are herein investigated. The application of a Boundary Element Method ...
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
0Because of the increasing interest in underwater radiated noise levels of ships, noise mitigation measures have been applied to the new secondary ...
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
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
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
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
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
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
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
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
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 ...
