CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Marine Propeller Hydroacoustic Simulation in Star CCM

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   November 18, 2017, 14:43
Angry Marine Propeller Hydroacoustic Simulation in Star CCM
New Member
Join Date: Nov 2017
Posts: 5
Rep Power: 8
BlackEagle is on a distinguished road
Hello All,

I will try to solve open water marine propeller hydro-acoustic performance in Star CCM. But I have lots of questions about the FW-H module.

The Star CCM user guide explains the aeroacoustic cylinder solution but there is no information about the hydroacoustic. Because the air and water are so different. The Star CCM+ user guide recommends that IASPL IF97 should be used in hydroacoustic simulation and speed of sound must be 1500 m/s.

The FW-H module composes of the receivers and surfaces. But the pressure probes are used in order to calculate to sound pressure during the analyses. In addition, the receiver also are put the same location like pressure probes. To calculate the sound pressure level, I can just select the pressure points which are added in derived part. I can not make FFT for receivers. There is no option for that. How can I make this?

The other question, I choose propeller blades as sound source. But I m not sure the FW-H module use this one. I choose the impermeable surface for propeller blades. I will wonder that how the FW-H module calculate the noise for defined acoustic surfaces.?

Another question is about the noise decrasing with the distance. For example, I put the pressure probes behind the propeller at x=4D and x=8D. After the analyses, I make FFT to obtain the SPL-f spectrum. But it is interesting that, the sound pressure level is not decreasing with the distance in far field. they are almost same. But according to theory, the noise must descrase as 6 dB if the distance doubled.

It is so annoying. Does anyone want to help me about the subject? (
BlackEagle is offline   Reply With Quote

Old   December 8, 2017, 21:33
Thumbs up Marine Propeller Hydroacoustic Simulation in Star CCM
New Member
Join Date: Dec 2017
Posts: 1
Rep Power: 0
kiranv is on a distinguished road
Dear Kashan,

Thank you for posting query. As you must be aware of that Aero/Hydro Acoustics demands high resolution of mesh to achieve the meaningful results and degree of accuracy. In fact no CFD can address Hydro Acoustics and can not claim single set of tool can address your real time problems. FW-H is said to be better option for especially Hydro acoustics and is not just recommended to capture dipole source of noise that is radiated from Propeller but also to measure the far field propagated noise at the microphone locations.

You can refer the paper "Verification of FW-H Method for Estimations of Pressure Fluctuation induced by Cavitating Marine Propeller".

Kiran Voonna
kiranv is offline   Reply With Quote


hydroacoustics, marine propeller noise, propeller noise

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Streamline simulation for Ducted Propeller bmaldi STAR-CCM+ 2 September 20, 2015 03:20
[Commercial meshers] Using starToFoam clo OpenFOAM Meshing & Mesh Conversion 33 September 26, 2012 04:04
[Other] StarToFoam error Kart OpenFOAM Meshing & Mesh Conversion 1 February 4, 2010 04:38
A genearl question on STAR CCM nstar STAR-CCM+ 5 June 24, 2009 09:39
Propeller Fan Curve Simulation Teng_YJ FLUENT 2 February 16, 2009 19:37

All times are GMT -4. The time now is 09:24.