Blätter-Navigation

Of­f­re 105 sur 230 du 10/07/2017, 00:00

logo

RWTH Aachen - Chair of Fluid Mechanics and Institute of Aerodynamics

The Chair of Fluid Mechanics and Institute of Aerodynamics belong to the Faculty of Mechanical Engineering of the RWTH Aachen University. The institute is composed of the experimental and numerical divisions and the biomedical fluid dynamics laboratory.
With approx. 30 publicly and industrially funded research projects and an annual level of expenditure of around 2.0 Mio. €, the Chair of Fluid Mechanics and Institute of Aerodynamics belong to the strongest university research institutes in the field of fluid dynamics in Germany.

The research group

Newly installed research group within the Emmy Noether program of the German Research Foundation (DFG): „Separation control with Air Jet Vortex Generator arrays in transonic and supersonic flow“.

The project

Shock-induced flow separation strongly influences the aerodynamic behavior of many applications in aerospace transportation. The ubiquity and strong influence of these flows motivated great efforts to develop methods that reduce the detrimental effects of separation. This project investigates a promising and very versatile technique: Air Jet Vortex Generators (AJVGs). An array of small continuous air jets inserts vortices into the boundary layer. The vortices entrain high-momentum fluid and increase turbulent mixing, which leads to smaller separation zones and a reduction of the associated unsteadiness. The system is relatively simple, yet more flexible than mechanical devices. Efficient control requires to understand the governing mechanisms in the uncontrolled flow field. This is the first main project goal. The second objective is to analyze the separation-control mechanisms and parameters of Air-Jet Vortex-Generator arrays. On this basis, the next aims are optimized control setups for more complex models, simulating the relevant effects for transonic airfoils and inlets of supersonic air-breathing engines. The last goal is to expand separation control towards higher speeds important for novel space-transportation concepts and to assess the Mach number influence on the control concept. To get access to data of a quality that could not be achieved before, and to get a multilayered access to the problem, the group approaches these tasks with closely intertwined experimental and numerical methods.

Research Assistant/Associate

Work­ing field:

You will con­trib­ute to the setup and val­id­a­tion of the new PIV sys­tem. In the begin­ning of the pro­ject, you will design the exper­i­mental mod­els in exchange with the numer­ical sim­u­la­tions that are also car­ried out within the research group. Your will cre­ate exper­i­mental setups in the wind tun­nel and carry out meas­ure­ment cam­paigns inde­pend­ently as well as in a team. You will carry out the ana­lysis, inter­pret­a­tion, and visu­al­iz­a­tion of the exper­i­mental res­ults in close col­lab­or­a­tion with the numer­ical branch of the research group. Also the super­vi­sion of stu­dents car­ry­ing out their bach­elor and mas­ter theses within the research group will be among your respons­ib­il­it­ies. Fur­ther­more, you will write research reports and pub­lic­a­tions in peer-reviewed journ­als, and you will present your research res­ults in national and inter­na­tional con­fer­ences. The aim is, that your res­ults and pub­lic­a­tions are of suf­fi­ciently high qual­ity to become part of your doc­toral thesis.

Require­ments:

You hold a uni­versity degree (Mas­ter of Sci­ence or com­par­able) in the fields of mech­an­ical or aerospace engin­eer­ing with a focus on fluid dynam­ics with above-aver­age grades.

You are curi­ous and inter­ested in sci­entific research. You have ambi­tion to work in aca­demia and are inspired by your research sub­ject. You carry out your work thor­oughly and inde­pend­ently. Fur­ther­more, you are motiv­ated to col­lab­or­ate closely within this exper­i­mental/numer­ical research group as well as with pro­ject part­ners.

You have already gained exper­i­ence in set­ting up and car­ry­ing out wind-tun­nel exper­i­ments, as well as in data ana­lysis. Exper­i­ence with Particle-Image Veloci­metry (PIV) is a def­in­ite plus. You have extens­ive prior know­ledge in fluid mech­an­ics, espe­cially in the areas of com­press­ible flow and tur­bu­lence. You have excel­lent Eng­lish lan­guage skills, oral and writ­ten, and you have soft­ware devel­op­ing know­ledge, par­tic­u­larly with Mat­lab.

What we of­fer:

The pos­i­tion is for 18 months and is to be filled as soon as pos­sible. Depend­ing on the pos­it­ive eval­u­ation of your doc­toral pro­ject a pro­long­a­tion of the con­tract for another 18 months is pos­sible. This is a full-time pos­i­tion.
The suc­cess­ful can­did­ate has the oppor­tun­ity to pur­sue a doc­toral degree.
The salary cor­res­ponds to level TV-L EG 13.

RWTH Aachen Uni­versity is cer­ti­fied as a "Fam­ily-Friendly Uni­versity". We par­tic­u­larly wel­come and encour­age applic­a­tions from women, dis­abled per­sons and eth­nic minor­ity groups, recog­niz­ing they are under­rep­res­en­ted across RWTH Aachen Uni­versity. The prin­ciples of fair and open com­pet­i­tion apply and appoint­ments will be made on merit.

How to ap­ply:

For further details, please contact
Dr.-Ing. Anne-Marie Schreyer
Tel.: +49 (0) 241 80 95188
Fax: +49 (0) 241 80 92257
Email: a.schreyer@aia.rwth-aachen.de

Please send your application by July 14, 2017 to
Chair of Fluid Mechanics and
Institute of Aerodynamics
Dr.-Ing. Anne-Marie Schreyer
Wüllnerstr. 5a
52062 Aachen

You can also send your application via email to a.schreyer@aia.rwth-aachen.de. Please note, however, that communication via unencrypted e-mail poses a threat to confidentiality as it is potentially vulnerable to unauthorized access by third parties.