EUROSHOCK - Drag Reduction by Passive Shock Control

It has been recognized by the European Union (EU) that the survival of the Aeronautical Industries of Europe in the highly competitive World Aviation Market is strongly dependent on such factors as time-to-market of a new or derivative aircraft and on its manufacturing costs but also on the achievement of a competitive technological advantage by which an increased market share can be gained. Cooperative research is therefore continuously encouraged and co-financed by the European Union in order to strengthen the scientific and technological base of the Aeronautical Industries thus facilitating the future design and manufacture of civil air craft products and providing the technological edge needed for survival. Targets of research within Area 3, Aeronautics, of the Industrial and Materials Technology Programme (1991 - 1993) have been identified to be aircraft efficiency, cost effectiveness and environmental im pact. Concerning aircraft efficiency - relevant to the present research - a reduction in aircraft drag of 10010, a reduction in aircraft fuel consumption of 30010 and a reduction in airframe, en gine and system weight of 20% are envisaged. Meeting these objectives has, of course, also a strong positive impact on the environment. In order to further technology, the philosophy is to avoid spreading the available resources too thinly and rather concentrate on the feasibility demonstration of a limited number of tech nologies of high economic and industrial impact.

Internationales Forschungsprogramm

Autorentext

Die Herausgeber entstammen den am Forschungsprojekt beteiligten Institutionen.
Dr. Egon Stanewsky und Dr. Wolfgang Geißler forschen am DLR in Göttingen.
Professor Jean Delery am ONERA in Chatillon (Frankreich).
Dr. John Fulker am DRA in Bedford (England).

Klappentext

This volume contains the description of an EC-sponsered program to study all relevant aspects of shock/ boundary-layer interaction control, the latter designed to improve aircraft performance at design (cruise) and off-design conditions. The work being presented includes a discussion of basic control experiments and the corresponding physical modeling, to account for shock control and a discussion of the airfoil experiments conducted for code validation and control assessment, in conjunction with the basic experiments and computations. The contents is comprised of a section giving a broad overview of the research carried out here and more detailed individual contributions by the participants in the research. Der Band enthält den Abschlußbericht eines von EU geförderten Projekts EUROSHOCK, das alle relevanten Aspekte der Kontrolle von Stoßfronten und Grenzschichten (wichtig z.B. für die Verbesserung der Flugeigenschaften von Fluzeugen) untersuchte. Neben einer ausführlichen Diskussion der grundlegenden Kontrollexperimente und der zugrundeliegenden Modellierung werden auch die Versuche an Tragflächen beschrieben, die zur Validierung von Modellrechnungen durchgeführt werden. Darüber hinaus enthält der Band auch die detaillierten Ergebnisse der Teilnehmer an dem Forschungsprogramm.

Inhalt
A. Synopsis of the Project EUROSHOCK.- 1 Introduction.- 2 Basic Experiments and Physical Modeling.- 3 Extension of Numerical Methods and Preliminary Control Assessment.- 4 Airfoil Tests with and without Control.- 5 Assessment of Shock Control - A Summary.- 6 Overall Conclusion and Future Work.- 7 References.- B Individual Contribution.- 8 Introduction to the Individual Contributions.- 9 Basic Study of Passive Control Applied to a Two-dimensional Transonic Interaction.- 10 Passive Control of Shock Wave - Boundary Layer Interaction and Porous Plate Transpiration Flow.- 11 An Investigation of Passive Control Applied to Swept Shock-Wave/Boundary Layer Interactions.- 12 Numerical Investigation of the Passive Shock Control on Transonic Airfoils Through an Euler/Boundary-Layer Coupling Technique.- 13 Introduction of Passive Shock Control in an Interactive Boundary Layer Method.- 14 Extension, Validation and Application of the DA VII Transonic Airfoil Code with Passive Shock Control.- 15 Development of Viscous-Inviscid Interaction Codes for Prediction of Shock Boundary-Layer Interaction Control and Buffet over Airfoils.- 16 Transonic Airfoil Flow Prediction with Shock Boundary Layer Interaction Control by a Time-accurate Navier-Stokes Code.- 17 Shock Boundary Layer Interaction Control Predictions Using a Viscous-Inviscid Interaction Procedure and a Navier-Stokes Solver.- 18 Computation of Transonic Flows Applying Shock Boundary Layer Interaction Control.- 19 Design and Manufacture of the Cryogenic Laminar-type Airfoil DA LVA-1A with Passive Shock Control.- 20 Qualification by Laser Measurements of the Passive Control on the LVA-1A Airfoil in the T2 Wind Tunnel.- 21 Experimental Investigation of the Transonic Airfoils DA LVA-1A and VA-2 with Shock Control.- 22 An Experimental Investigation of Passive Shock/Boundary-Layer Control on an Aerofoil.- 23 An Experimental Investigation of Passive Shock/Boundary Layer Interaction Control on an Airfoil: Unsteady Measurements.