DEVELOPING THE NEXT-GENERATION OF HYDROPOWER TECHNOLOGY


Fluid structure interaction


CONTENTS

  We have a Postdoctoral Fellowship available. Visit the website for more detail.

Background

Fluid structure interaction is an important research group located at the Waterpower laboratory (NTNU). The research group is headed by Chirag Trivedi (Associate Professor) since July 2020. Our research group, dedicated to advancing the field of hydropower, is driven by a mission "clean energy for all". Our activities are aimed to contribute United Nations Sustainable Development Goals, specifically, goals 4, 5, 6, 7, 9, 11, 13 and 17. Among these, goals 4, 7, and 13 are critical and highly relevant to the research we conduct in the Waterpower laboratory. We focus on hydraulic turbines and pumps, addressing critical challenges and contributing to the body of knowledge through rigorous experimental and numerical analysis. Our interdisciplinary team, composed of experts in mechanical engineering, sustainability, environmental science and biodiversity, collaborates with leading academic institutions and industry partners to translate our findings into practical applications. Our interdisciplinary approach leverages cutting-edge technologies and methodologies, fostering a dynamic environment where ideas flourish and breakthroughs are achieved. By engaging with both academic and industry partners, we strive to translate our findings into practical applications that benefit society and drive progress in hydropower. With a track record of securing highly competitive research grants, we are committed to pushing the boundaries of fluid structure interaction and exploring new frontiers in energy flexibility, storage and sustainability.


The group aims to advance understanding and predictive capabilities in FSI, developing the next-generation of hydropower technology for sustainable future.


Objectives



  • Francis turbine
    • Start-stop
    • Speed-no-load
    • Total load rejection
  • Pump-turbine
    • Performance analysis
    • Rim driven thruster design and optimization
    • Draft tube flow (pump mode)
  • Hydrofoil
    • Boundary layer interaction
    • Hydrodynamic damping
    • Vibrations and natural frequencies


Research group



Chirag Trivedi leads the Fluid Structure Interaction Research Group, based in the Waterpower Laboratory. He joined the Waterpower Laboratory in April 2012 as an exchange doctoral researcher, then as a Postdoctoral Fellow in August 2014, and later as an Associate Professor in July 2020. With over 15 years of experience in Francis turbines and reversible pump-turbines, Chirag coordinates the group’s activities and supervises students. He is actively involved in both numerical and experimental research, as well as in developing the test rig for the project.






Contact us


Chirag Trivedi

Email e-mail : chirag.trivedi@ntnu.no

Visiting address placard : VannkraftlaboratorietAlfred Getz vei 4, 7034 Trondheim, Norway.

Website globe with meridiansWaterpower Laboratory


Postdoctoral Fellow



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Doctoral candidate



Gabriele Gaiti is is a PhD candidate who joined the research group in August 2021. He conducts fundamental research on fluid-structure interactions, focusing on hydrodynamic damping on hydrofoils. Gabriele has developed a circular blade cascade for damping and vibration measurements, enabling the measurement of pressure, velocity, and strain in hydrofoil test sections. Additionally, he is conducting numerical simulations of one-way fluid-structure interactions on hydrofoils. For more detailed information, please visit the dedicated project page.





Dadi Ram Dahal is a PhD candidate who joined the research group in September 2022. He conducts fundamental research on fluid-structure interactions, with a focus on the boundary layer on resonating surfaces. Dadi has developed test rigs for boundary layer research, enabling the measurement of pressure, velocity, and strain in hydrofoil test sections. Additionally, he is conducting numerical simulations of one-way and two-way fluid-structure interactions on geometrical shapes such as circular discs and rectangular plates. For more detailed information, please visit the dedicated project page.



Johannes Djupesland is a PhD candidate working full-time on the Store2Hydro project. He joined the research group in January 2024, shortly after the project’s inception. Johannes conducts research on reversible pump-turbines, focusing on IEC standard model tests in the Waterpower Laboratory. His work includes the design and optimization of thrusters for model pump-turbines. Johannes is a key contributor to Task 2.1, playing a crucial role in advancing the project’s objectives





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MSc student



Mikal Høie Tjølsen is writing master thesis on transient operation of Francis turbine. Mikal started master thesis in January 2025, and he will focus on numerical simulations with dynamic mesh. Mikal aims to move the guide vanes from the part-load to the best efficiency point of the Francis-99 turbine in the Waterpower laboratory. Mikal investigate the unsteady flow conditions in the vaneless space that will enable experimental investigations using PIV later.





Anker Moi Pedersen is writing master thesis on transient operation of Francis turbine. Anker started master thesis in January 2025, and he will focus on numerical simulations with dynamic mesh. Anker aims to move the guide vanes from no-load position to the part-load position of the Francis-99 turbine in the Waterpower laboratory. Anker investigate the unsteady flow conditions in the vaneless space that will enable experimental investigations using PIV later.



Mathias Eikebø writes master's thesis during spring 2025. The title of the thesis is "Numerical study of reversible pump-turbine at selected operating conditions." Mathias Eikebø will carry out 3D computational fluid dynamic simulations of the reversible pump-turbine at different operating conditions. Main task is to investigate the flow field in the runner and draft tube that provides required input to the thruster design. The task also includes the study of the secondary flow in the draft tube comparing different outlet profiles of the draft tube.





Gustav Oskar Ludvig Ambj̈ornsson writes master's thesis during spring 2025. The title of the thesis is "Design and optimization of rim type thruster." Gustav Oskar Ludvig Ambj̈ornsson aimed to carry out optimization of the blades needed for the rim type thruster. Gustav will use design of experiments and AI to optimize the two-dimensional profile of the blade and extend to three-dimensional profile. The final design will be simulate using ANSYS.



Kerlef Valen Kerlefson writes master's thesis during spring 2025. The title of the thesis is "Experimental study of reversible pump-turbine at selected operating conditions." Kerlef Valen Kerlefson will carry out the experiments on the reversible pump-turbine following IEC60193, including calibration of the important instruments equipped on the test rig. Main task is to determine the efficiency of the pump-turbine runner. After the efficiency measurements, Kerlef Valen Kerlefson will continue unsteady pressure measurements at other valuable operating conditions needed for the design of the thruster.




 


Ole Martin Fjuk writes project during spring 2025. The title of the project is "Design and optimization of rim type thruster." Ole Martin Fjuk will work with Gustav Oskar Ludvig Ambj̈ornsson for optimization of the thruster blade however, Ole Martin Fjuk will focus on other optimization methods and automation of the blade profiling and parametrization within computational fluid dynamic simulations.


United Nations Sustainable Development Goals

The research group, dedicated to the field of hydropower, is driven by a mission "clean energy for all", and the activities are aimed to contribute United Nations Sustainable Development Goals 4, 5, 6, 7, 9, 11, 13 and 17. However, three goals are directly associated with the research group.


Goal 4: Quality education

"Ensure inclusive and equitable quality education and promote lifelong learning opportunities for all." The research group is involved in education and teaching several students at NTNU through different courses. The courses are in the field of renewable energy and sustainability. Moreover, the research group uses state-of-the-art research cases for the exercises in the courses, and also allows students to join the research group and work in the Waterpower laboratory. Thus, students will have access to the new research technology and knowledge.

Goal 7: Affordable and clean energy

"Ensure access to affordable, reliable, sustainable and modern energy for all." Around 675 million people still live in the dark! Main research field for the research group is hydropower, where this goal is highly relevant and directly associated. The research group focuses on conducting research that enables sustainable and affordable technological solution for the hydropower. The group conducts both experimental and numerical research on hydraulic turbines that provides clean and low cost energy to all.

Goal 13: Climate action

"Take urgent action to combat climate change and its impacts." Hydropower has critical role in both reducing the climate impact and providing secured and stable energy. The turbine efficiency is high that means the losses are minimum. However, the current efforts are aimed to provide solutions that has minimum impact on the environment and enhance sustainability. The additional effort is also put up on reducing the carbon footprint for upcoming hydropower projects providing alternative approaches and technological solutions through research and development.


Collaboration

Our research group is dedicated to fostering collaborative partnerships with academic institutions, industry leaders, and research organizations worldwide, specifically in the field of Fluid Structure Interaction (FSI). By leveraging diverse expertise and resources, we aim to tackle complex challenges related to fluid dynamics and structural mechanics, driving innovation in areas such as hydropower, marine engineering, and turbomachinery. Our collaborative efforts focus on advancing cutting-edge research, sharing knowledge, and translating findings into practical applications that enhance the design and performance of fluid-interacting structures. We believe that through strong, interdisciplinary collaborations, we can achieve greater impact and contribute significantly to the global scientific community in FSI.

Norway

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Europe

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North America

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Teaching

Education and knowledge sharing are fundamental aspects of our research group, aligning with UN SDG 4: Quality Education. We incorporate real-time research cases into our courses, enabling students to engage with state-of-the-art knowledge in their respective fields. This approach not only enhances their learning experience but also supports their career development. Our research group is actively involved in teaching the following courses: