Numerical Investigation of the Resistance and Propulsion Performance of High-Speed Catamarans

About the research project

Waterjet propulsion systems are widely used in high-speed catamarans due to their high manoeuvrability, compact design, and suitability for shallow-water operations. However, their performance is strongly influenced by the design and arrangement of the waterjet intake ducts, as well as interactions between the propulsion system and the vessel hull. Understanding these interactions is essential for improving thrust generation, propulsive efficiency, and overall vessel performance.

This project aims to numerically investigate the hydrodynamic performance of waterjet propulsion systems in a high-speed catamaran, focusing on the effects of different intake duct configurations and waterjet arrangements. Particular attention will be given to the number of waterjets and their transverse and longitudinal spacing, with the objective of identifying configurations that improve propulsion performance while minimising adverse hydrodynamic interactions.

Computational Fluid Dynamics (CFD) simulations will be conducted using a self-propelled numerical model of a high-speed catamaran. The numerical approach will account for the interactions between the hull, intake ducts, and waterjet propulsion systems under representative operating conditions. The simulations will investigate the flow characteristics around the hull and within the intake ducts, including velocity distributions, pressure variations, flow uniformity, and potential flow separation.

The performance of each configuration will be assessed using key hydrodynamic indicators, including generated thrust, thrust deduction, propulsion efficiency, vessel resistance, and the power required to achieve a target operating speed. Comparisons between configurations will help identify the relationships between intake arrangement, hull–propulsor interaction, and self-propulsion characteristics.

The expected outcome is an improved understanding of how waterjet arrangements affect the propulsion performance of high-speed catamarans. The findings will provide practical recommendations for optimising waterjet configurations and contribute to the development of more efficient high-speed marine propulsion systems.

Primary supervisor

Meet Doctor Javad Mehr

Funding

Applicants will be considered for a Research Training Program (RTP) scholarship or Tasmania Graduate Research Scholarship (TGRS) which, if successful, provides:

• a living allowance stipend funded by University of Tasmania of $34,315 per annum for 3.5 years
• a relocation allowance of up to $2,000
• a tuition fees offset covering the cost of tuition fees for up to four years (domestic applicants only)

A tuition fee offset may be offered to eligible international applicants following competitive assessment 

As part of the application process you may indicate if you do not wish to be considered for scholarship funding.

Other funding opportunities and fees

For further information regarding other scholarships on offer, and the various fees for undertaking a research degree, please visit our Scholarships and fees on research degrees page.

Eligibility

Applicants should review the Higher Degree by Research minimum entry requirements.

Ensure your eligibility for the scholarship round by referring to our Key Dates.

Selection criteria

The project is competitively assessed and awarded. Selection is based on academic merit and suitability to the project as determined by the College.

Additional essential selection criteria specific to this project:

• A Bachelor's degree with Honours or a Master's degree in Naval Architecture, Marine Engineering, Mechanical Engineering, or a closely related discipline.
• A strong understanding of fluid mechanics, hydrodynamics, and marine propulsion systems.
• Knowledge of Computational Fluid Dynamics (CFD) principles and numerical simulation techniques.
• At least one published research article in a Q1-ranked peer-reviewed journal in a relevant field.
• Demonstrated analytical and problem-solving skills, with the ability to conduct independent research.
• Good written and verbal communication skills, including the ability to prepare technical reports and present research findings.
• Ability to work independently and collaboratively with academic supervisors and industry partners.

Additional desirable selection criteria specific to this project:

• Experience using CFD software such as ANSYS Fluent, STAR-CCM+, OpenFOAM, or similar packages.
• Knowledge of waterjet propulsion systems, particularly intake duct design, thrust generation, and propulsive efficiency.
• Experience in numerical modelling of ship resistance, propulsion, and self-propulsion performance.
• Familiarity with high-speed marine vessels, particularly catamarans.
• Programming skills in Python, MATLAB, or similar tools for numerical analysis and data processing.
• Experience in CFD mesh generation, turbulence modelling, and numerical verification and validation.
• Previous research experience or involvement in industry-related engineering projects.
• Interest in sustainable maritime technologies and improving vessel energy efficiency.

Application process

1. Select your project, and check that you meet the eligibility and selection criteria, including citizenship;
2. Contact Doctor Javad Mehr to discuss your suitability and the project's requirements; and
3. In your application:
   • Copy and paste the title of the project from this advertisement into your application. If you don’t correctly do this your application may be rejected.
   • Submit a signed supervisory support form, a CV including contact details of 2 referees and your project research proposal.
4. Apply prior to 1 March 2027.

Full details of the application process can be found under the ' How to apply ' section of the Research Degrees website.

Following the closing date applications will be assessed within the College. Applicants should expect to receive notification of the outcome by email by the advertised outcome date.

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