Determination of propeller cavitation inception diagram by numerical methods

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URL

Journal Title

Journal ISSN

Volume Title

Insinööritieteiden korkeakoulu | Master's thesis

Authors

Date

2022-03-21

Department

Major/Subject

Marine Technology

Mcode

Degree programme

Master's Programme in Mechanical Engineering (MEC)

Language

en

Pages

57+4

Series

Abstract

The thesis looks into different cavitation types on marine propellers and prepare to numerically simulate the cavitation inception diagrams which are conventionally available by conducting cavitation tests. Sheet and bubble cavitations are the main focus in this thesis. Panel method was employed and embedded in the numerical tool named ProCal. The simulation conditions and result post-processes are defined by meaning of Matlab scripting. The produced diagrams are later verified using a viscous flow solver (StarCCM+) and validated with model test results. The overall result indicates that the scripts meet the defined expectations and exceed its scope when attempting to show vortex cavitations. As the scripts were written in backward order to meet the validation stage first, the verification stage brings out different perspectives that aid in understanding the produced diagram comprehensively. Disparities between numerical methods (ProCal and StarCCM+) versus model tests are addressed and analysed.

Description

Supervisor

Ruponen, Pekka

Thesis advisor

Lindfors, Mikael

Keywords

cavitation inception diagram, cavitation bucket, sheet and bubble cavitation, Panel method, CFD

Other note

Citation

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202203272580

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[dipl] Insinööritieteiden korkeakoulu / ENG