PhD position in Acoustic resonance for boundary layer flow control

Updated: 2 months ago
Deadline: 15 Oct 2022

Being able to manipulate and enhance the aerodynamic performance of any type of transport system (e.g., aircraft, ground-based vehicles) requires a full understanding of how receptive turbulent flows are to passive control. Namely, most of the fuel burn of large-scale transportation systems goes into overcoming the resistive force from layers of turbulent fluid adjacent to the external surfaces. To achieve sustainability goals for transportation systems for the mass of people, such as commercial aviation, we need innovative methods to modify these layers of turbulence around these systems. Deterministic control of this layer of turbulence requires a physics-driven design & implementation of the control methods, and detailed research on the receptivity of boundary layers to the passive control method, as well as on the overall performance benefits.

The project scope is inspired from direct applications of the topic to the aerospace industry. This project aims to investigate the underlying flow physics of a passive approach for turbulent boundary layer flow-control, utilizing acoustically self-resonating surfaces. The intent is to subtly attenuate features of the boundary layer turbulence that are primarily responsible for the generation of turbulent skin friction. Research will comprise the development of this passive, distributed surface technology for boundary layer flow control, and has applications towards friction reduction and wake suppression of separating boundary layer flows. Your R&D efforts will comprise experimental and numerical investigations of the flow-induced acoustic resonance, the receptivity of the turbulent flow to this type of control, detailed investigations of the integrated performance of these surfaces and optimization strategies for tailored applications.

To succeed in this externally funded project within the area of fundamental fluid mechanics, you will need a strong interest in and aptitude for: turbulence and dynamical systems, fluid mechanics, experimental and numerical data processing and laboratory design work, including hardware construction. Throughout the project, you are expected to become the expert on how to manipulate drag-producing flows with tailored designs of resonators and arrays of those. Scientific outcomes of this project will have important implications for the increase in performance of aerospace-type transport vehicles, and the design of low-drag surfaces.

  • A M.Sc. degree with a focus in fluid mechanics (e.g., aerospace engineering, mechanical engineering or applied physics)
  • Strong mathematical and analytical skills
  • Fundamental knowledge of turbulence and knowledge of dynamical systems, vibrations and control is an asset
  • Strong affinity with (and background in) experimental techniques for aerodynamics
  • Affinity with numerical/experimental data processing techniques and programming
  • Hands on with lab-work, skilled in experimental design and hardware construction
  • Excellent communication skills in spoken and written English
  • Creativity, assertive attitude, and perseverance

The selection process will start immediately; the intended start date is in the Fall of 2022.

Doing a PhD at TU Delft requires English proficiency at a certain level to ensure that the candidate is able to communicate and interact well, participate in English-taught Doctoral Education courses, and write scientific articles and a final thesis. For more details please check the Graduate Schools Admission Requirements.

Doctoral candidates will be offered a 4-year period of employment in principle, but in the form of 2 employment contracts. An initial 1,5 year contract with an official go/no go progress assessment within 15 months. Followed by an additional contract for the remaining 2,5 years assuming everything goes well and performance requirements are met.

Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities, increasing from € 2541 per month in the first year to € 3247 in the fourth year. As a PhD candidate you will be enrolled in the TU Delft Graduate School. The TU Delft Graduate School provides an inspiring research environment with an excellent team of supervisors, academic staff and a mentor. The Doctoral Education Programme is aimed at developing your transferable, discipline-related and research skills.

The TU Delft offers a customisable compensation package, discounts on health insurance and sport memberships, and a monthly work costs contribution. Flexible work schedules can be arranged. For international applicants we offer the Coming to Delft Service and Partner Career Advice to assist you with your relocation.

Delft University of Technology is built on strong foundations. As creators of the world-famous Dutch waterworks and pioneers in biotech, TU Delft is a top international university combining science, engineering and design. It delivers world class results in education, research and innovation to address challenges in the areas of energy, climate, mobility, health and digital society. For generations, our engineers have proven to be entrepreneurial problem-solvers, both in business and in a social context.

At TU Delft we embrace diversity as one of our core values and we actively engage to be a university where you feel at home and can flourish. We value different perspectives and qualities. We believe this makes our work more innovative, the TU Delft community more vibrant and the world more just. Together, we imagine, invent and create solutions using technology to have a positive impact on a global scale. That is why we invite you to apply. Your application will receive fair consideration.

Challenge. Change. Impact!

The Faculty of Aerospace Engineering at Delft University of Technology is one of the world’s most highly ranked (and most comprehensive) research, education and innovation communities devoted entirely to aerospace engineering. More than 200 science staff, around 250 PhD candidates and over 2,700 BSc and MSc students apply aerospace engineering disciplines to address the global societal challenges that threaten us today, climate change without doubt being the most important. Our focal subjects: sustainable aerospace, big data and artificial intelligence, bio-inspired engineering and smart instruments and systems. Working at the faculty means working together. With partners in other faculties, knowledge institutes, governments and industry, both aerospace and non-aerospace. Working in field labs and innovation hubs on our university campus and beyond.

Click here to go to the website of the Faculty of Aerospace Engineering.

For information about this vacancy and the selection procedure, please contact Dr. ir. Woutijn Baars, w.j.baars@tudelft.nl.

Are you interested in this vacancy? Please apply before 15 October 2022 via the application button and upload your motivation and CV.

  • Submit the following in two pdf files: (pdf 1) a 1-page Motivation letter, and your CV; (pdf 2) a (part of your) MSc. thesis or a paper that you have written, in which you demonstrate your writing and research skills.
  • Please highlight in your motivation letter and/or CV examples of projects and achievements that demonstrate your relevant competences, and explain your motivation for pursuing a PhD in general, and this PhD in particular.
  • A pre-employment screening can be part of the selection procedure.
  • You can apply online. We will not process applications sent by email and/or post.
  • Acquisition in response to this vacancy is not appreciated.

Being able to manipulate and enhance the aerodynamic performance of any type of transport system (e.g., aircraft, ground-based vehicles) requires a full understanding of how receptive turbulent flows are to passive control. Namely, most of the fuel burn of large-scale transportation systems goes into overcoming the resistive force from layers of turbulent fluid adjacent to the external surfaces. To achieve sustainability goals for transportation systems for the mass of people, such as commercial aviation, we need innovative methods to modify these layers of turbulence around these systems. Deterministic control of this layer of turbulence requires a physics-driven design & implementation of the control methods, and detailed research on the receptivity of boundary layers to the passive control method, as well as on the overall performance benefits.

The project scope is inspired from direct applications of the topic to the aerospace industry. This project aims to investigate the underlying flow physics of a passive approach for turbulent boundary layer flow-control, utilizing acoustically self-resonating surfaces. The intent is to subtly attenuate features of the boundary layer turbulence that are primarily responsible for the generation of turbulent skin friction. Research will comprise the development of this passive, distributed surface technology for boundary layer flow control, and has applications towards friction reduction and wake suppression of separating boundary layer flows. Your R&D efforts will comprise experimental and numerical investigations of the flow-induced acoustic resonance, the receptivity of the turbulent flow to this type of control, detailed investigations of the integrated performance of these surfaces and optimization strategies for tailored applications.

To succeed in this externally funded project within the area of fundamental fluid mechanics, you will need a strong interest in and aptitude for: turbulence and dynamical systems, fluid mechanics, experimental and numerical data processing and laboratory design work, including hardware construction. Throughout the project, you are expected to become the expert on how to manipulate drag-producing flows with tailored designs of resonators and arrays of those. Scientific outcomes of this project will have important implications for the increase in performance of aerospace-type transport vehicles, and the design of low-drag surfaces.

  • A M.Sc. degree with a focus in fluid mechanics (e.g., aerospace engineering, mechanical engineering or applied physics)
  • Strong mathematical and analytical skills
  • Fundamental knowledge of turbulence and knowledge of dynamical systems, vibrations and control is an asset
  • Strong affinity with (and background in) experimental techniques for aerodynamics
  • Affinity with numerical/experimental data processing techniques and programming
  • Hands on with lab-work, skilled in experimental design and hardware construction
  • Excellent communication skills in spoken and written English
  • Creativity, assertive attitude, and perseverance

The selection process will start immediately; the intended start date is in the Fall of 2022.

Doing a PhD at TU Delft requires English proficiency at a certain level to ensure that the candidate is able to communicate and interact well, participate in English-taught Doctoral Education courses, and write scientific articles and a final thesis. For more details please check the Graduate Schools Admission Requirements.

Doctoral candidates will be offered a 4-year period of employment in principle, but in the form of 2 employment contracts. An initial 1,5 year contract with an official go/no go progress assessment within 15 months. Followed by an additional contract for the remaining 2,5 years assuming everything goes well and performance requirements are met.

Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities, increasing from € 2541 per month in the first year to € 3247 in the fourth year. As a PhD candidate you will be enrolled in the TU Delft Graduate School. The TU Delft Graduate School provides an inspiring research environment with an excellent team of supervisors, academic staff and a mentor. The Doctoral Education Programme is aimed at developing your transferable, discipline-related and research skills.

The TU Delft offers a customisable compensation package, discounts on health insurance and sport memberships, and a monthly work costs contribution. Flexible work schedules can be arranged. For international applicants we offer the Coming to Delft Service and Partner Career Advice to assist you with your relocation.

Delft University of Technology is built on strong foundations. As creators of the world-famous Dutch waterworks and pioneers in biotech, TU Delft is a top international university combining science, engineering and design. It delivers world class results in education, research and innovation to address challenges in the areas of energy, climate, mobility, health and digital society. For generations, our engineers have proven to be entrepreneurial problem-solvers, both in business and in a social context.

At TU Delft we embrace diversity as one of our core values and we actively engage to be a university where you feel at home and can flourish. We value different perspectives and qualities. We believe this makes our work more innovative, the TU Delft community more vibrant and the world more just. Together, we imagine, invent and create solutions using technology to have a positive impact on a global scale. That is why we invite you to apply. Your application will receive fair consideration.

Challenge. Change. Impact!

The Faculty of Aerospace Engineering at Delft University of Technology is one of the world’s most highly ranked (and most comprehensive) research, education and innovation communities devoted entirely to aerospace engineering. More than 200 science staff, around 250 PhD candidates and over 2,700 BSc and MSc students apply aerospace engineering disciplines to address the global societal challenges that threaten us today, climate change without doubt being the most important. Our focal subjects: sustainable aerospace, big data and artificial intelligence, bio-inspired engineering and smart instruments and systems. Working at the faculty means working together. With partners in other faculties, knowledge institutes, governments and industry, both aerospace and non-aerospace. Working in field labs and innovation hubs on our university campus and beyond.

Click here to go to the website of the Faculty of Aerospace Engineering.

For information about this vacancy and the selection procedure, please contact Dr. ir. Woutijn Baars, w.j.baars@tudelft.nl.

Are you interested in this vacancy? Please apply before 15 October 2022 via the application button and upload your motivation and CV.

  • Submit the following in two pdf files: (pdf 1) a 1-page Motivation letter, and your CV; (pdf 2) a (part of your) MSc. thesis or a paper that you have written, in which you demonstrate your writing and research skills.
  • Please highlight in your motivation letter and/or CV examples of projects and achievements that demonstrate your relevant competences, and explain your motivation for pursuing a PhD in general, and this PhD in particular.
  • A pre-employment screening can be part of the selection procedure.
  • You can apply online. We will not process applications sent by email and/or post.
  • Acquisition in response to this vacancy is not appreciated.

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