Type dienstverband:
Internship and graduation project
Uren per week:
Fulltime – 40

Internship | Flow induced pulsation with jet-acoustic resonance

About this position

High amplitude tonal sound can be generated in closed-in side branches of pipe networks. This phenomenon is called FIP (Flow Induced Pulsations). In a number of (field) cases, configurations are found in which the inlet side branch diameter is much smaller than the header diameter and these systems showed a clear tonal noise due to FIP. However, the prediction of these tones and the amplitudes are very difficult to predict. The hypothesis is that the main interaction is not as a flat shear layer, but that due to the smaller inlet diameter the interaction is more jet – acoustic like. The study of this interaction is the main purpose in this assignment.

What will be your role?

The primary focus on this student assignment is on the experimental evaluation of the jet acoustic interaction. To test this, a setup must be constructed. Current ideas range from inlet – header (with variable inlet diameter, variable inlet location and variable header length) to a jet excited with a loudspeaker. During the literature search phase, the setup must be design in collaboration with the lab-staff. If time allows: CFD can be used to evaluate the interaction.

What we expect from you

We are looking for a student who is enthusiastic, critical and a team-player. We expect you to work hard and independently on your own project, but ask for help if needed. Knowledge on fluid mechanics and experience with experimentation is highly preferred.

The experimental activities will be performed in Delft. The analysis of the results can also be done at TNO office in Delft.
Duration: 6 to 9 months.

What you'll get in return

You want to work on the precursor of your career; a work placement gives you an opportunity to take a good look at your prospective future employer. TNO goes a step further. It’s not just looking that interests us; you and your knowledge are essential to our innovation. That’s why we attach a great deal of value to your personal and professional development. You will, of course, be properly supervised during your work placement and be given the scope for you to get the best out of yourself. Naturally, we provide suitable work placement compensation.

TNO as an employer

At TNO, we innovate for a healthier, safer and more sustainable life. And for a strong economy. Since 1932, we have been making knowledge and technology available for the common good. We find each other in wonder and ingenuity. We are driven to push boundaries. There is all the space and support for your talent and ambition. You work with people who will challenge you: who inspire you and want to learn from you. Our state-of-the-art facilities are there to realize your vision. What you do at TNO matters: impact makes the difference. Because with every innovation you contribute to tomorrow’s world. Read more about TNO as an employer.

At TNO we encourage an inclusive work environment, where you can be yourself. Whatever your story and whatever unique qualities you bring to the table. It is by combining our unique strengths and perspectives that we are able to develop innovations that make a real difference in society. Want to know more? Read what steps we are taking in the area of diversity and inclusion.

The selection process

After the first CV selection, the application process will be conducted by the concerning department. TNO will provide a suitable internship agreement. If you have any questions about this vacancy, you can contact the contact person mentioned below.

Has this job opening sparked your interest?

Then we’d like to hear from you! Please contact us for more information about the job or the selection process. To apply, please upload your CV and covering letter using the ‘apply now’ button.

A portrait of the TNO internship