BE95-1120 A cooperative Action to apply Particle Image Velocimetry to problems of Industrial Interest - EUROPIV
Considerable progress has been made, during the last twenty years in the field of aerodynarnics. Although many problems are still to be solved in turbulent flows, the mean flow characteristics can be quite accurately defined by the combined use of computer codes and wind tunnel experiments. To improve their aircraft and engines efficiency, the manufacturers have to look more and more to the 3D, unsteady aspects of the flow in some specific subdomain or in particular flight or working configurations. Complex viscous flows, separated flows, coherent structures in turbulence and transition phenomena become of primary importance in such situations. In these fields, computer simulations are still limited and much understanding has to be gained from experiments, both on the design and on the code validation point of view. An experimental approach to such flows and phenomena needs non-intrusive measurement methods, able to give a quantitative description of the instantaneous flow characteristics in a field rather than at one single point. Particle Image Velocimetry (PIY) has been developed for that purpose and gives access to the most primary variable: the velocity field. This method has been demonstrated at a laboratory scale in several teams in Europe and in the USA.
The aim of the present project is first to reinforce the knowledge of the method by taking advantage of the complementary research and development work performed by the participating teams. This is made possible by the extension of an existing activity in the frame of GARTEUR, to a broader European cooperation. The second objective is to prepare the future by studying the possible extensions of the present state of the art to access to the full three components of the instantaneous velocity field in a plane. The final and most crucial objective of the proposal is to demonstrate the applicability of the method to problems of industrial interest. This will be done at full scale for aerodynamic testing in industrial wind tunnels and at laboratory scale for turbomachinery.
In order to achieve the targeted objectives, the research program has been divided into five tasks:
- a critical evaluation of the existing know-how by use of a travelling test experiment and a network accessible database,
- a further development of the method, on some specific aspects (large flow seeding and video recording), in order to increase the efficiency and quality of the measurements,
- a study of ways to extend the method to measure the full three components of the instantaneous velocity field in a plane through stereoscopic and holographic experiments in both aerodynamics and turbomachinary situations,
- a full scale test in an industrial wind tunnel and a comparison of the results with numerical simulations,
- the exploitation of the results obtained and the preparation of a thematic network proposal.
The completion in a two years program of these five tasks should lead to the formation of a strong European community in PIV which will be able to perform high quality velocity field measurements in flows of industrial interest. It should also allow large cost savings by the way that all the partners involved will not have to develop and test all the possible solutions available for performing PIV measurements. For this purpose, the partnership structure has been divided in order to cover most of the solutions under study worldwide. The know how developed in the frame of the EUROPIV project will be usable and used immediately in other European programs like ENIFAIR or APIAN. It will be used also by the seven partners of AERA in their large facilities.
Funding SchemeCSC - Cost-sharing contracts
GU14 0LS Farnborough
161 11 Bromma
1006 BM Amsterdam
2628 AL Delft
CV4 7AL Coventry