von Karman Institute Lecture Series and Events

Radial Compressor Design and Optimization

Monday 08 February 2021 - Friday 12 February 2021

VKI secretariat, This email address is being protected from spambots. You need JavaScript enabled to view it.; Phone: +32 2 359 96 04

 Radial Compressor Design and Optimization

This short course is the regular course on radial compressors thought at VKI to the turbomachinery students specializing in compressors in the context of the “Research Master in Fluid Dynamics”. It provides an overview of the present knowledge and flow models and intends to provide a good background for the people interested in the aerodynamic design of radial compressors. This 5 day course is now made available to a limited number of people from outside VKI. Lectures and exercises are given by Prof. R.A. Van den Braembussche and Prof. T. Verstraete.


In any case, the lecture series are foreseen ONLINE. If the COVID situation improves, we will organize the lecture series on site.


Courses start everyday at 8h45 and finish at 17h00 (at 15h on Friday).

Applications and achievable efficiency

Diabatic flows and influence of gas characteristics

Reynolds number effect and scaling

Transformation of energy in radial impellers and performance maps

Inlet guide vanes and inducer geometry

Three dimensional flow in impellers and performance prediction

  • Blade loading
  • Two zone modeling
  • Slip factor
  • Disk friction
  • Secondary flows (mechanisms and control)

Vaneless and vaned diffusers

Inlet volutes

Flow and loss mechanisms in outlet volutes

Impeller response to outlet distortion

Stability and range:

  • Rotating stall (types and control)
  • Surge (physics, models and control)
  • Active surge control

How to avoid surge and stall

Design and optimization techniques

Design exercise using VKI software

Eligibility Criteria

The citizens of the following countries are eligible to attend the von Karman Institute Lecture Series:

- EU member countries
- NATO member countries
- NATO's Mediterranean Dialogue (Algeria, Egypt, Israel, Jordan, Mauritania, Morocco, Tunisia)
- Istanbul Cooperation Initiative (Bahrain, Kuwait, Qatar, United Arab Emirates)
- Argentina, Australia, Bolivia, Brazil, Cabo Verde, Cameroon, Chile, Colombia, Japan, India, Indonesia, Macedonia, Malaysia, Mauritania, Mexico, Montenegro, Mozambique, New Zealand, Nigeria, Republic of Korea, Saudi Arabia, Serbia, Singapore, South Africa, Switzerland, Thailand, Uruguay, South-Africa and Vietnam.

VKI reserves the right to request a clearance check with Belgian authorities.

The participants will have to present their ID card (for EU citizens) or passport (for other citizens) the first day of the lecture series.

Fee and Registration

Considering the limited number of participants it is highly recommended that the registration form is sent at the latest 15 days before the beginning of the course. A letter of acceptance and additional information will be sent on receipt of the application form.

Early bird registration fee (until December 8, 2020 included)

Price for citizens of NATO countries funding VKI

Belgium, Bulgaria, Czech Republic, France, Germany, Greece, Hungary, Iceland, Italy, Luxemburg, Norway, Portugal, Romania, Turkey and the United States

  Early registration Late registration
Undergraduate students 236.25 262.5
PhD students  630 700
Staff from recognized universities / research center 1260 1400
Staff from commercial organizations 3150 3500


Price for citizens of other countries

  Early registration Late registration
Undergraduate students 337.5 375
PhD students  900 1000
Staff from recognized universities / research center 1800 2000
Staff from commercial organizations 4500 5000

Information for PhD candidates and undergraduate students: To obtain the reduced price, the applicant must provide a recommendation letter from his or her professor; if not, the request will not be taken into consideration.

Special reduction

Rebates can be given for group subscriptions along the following scheme :

- 5 persons of the same organization -2%
- 10 persons of the same organization -5%
- 20 persons of the same organization -10%