Das Projekt "FP3-BRITE/EURAM 2, Asbestos-Free Materials for Gaskets for Bolted Flanged Connections" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: Universität Stuttgart, Staatliche Materialprüfungsanstalt.General Information: Bearing in mind rising standards of immission control and restrictions on the use of gasket materials containing asbestos, the proposed project plans to create the basis for a systematic and optimized development of new gasket materials and to provide realistic evidence of the strength and tightness of flanged joints. The main tasks of the project are: - to define and set the relevant gasket factors, - to work out, verify and set the test procedures for the determination of the above mentioned gasket factors, - to determine the gasket factors for asbestos free materials including the sealing and relaxation properties under realistic operation conditions (medium, temperature, time, pressure, changing loads), - to draft out European standards for defining gasket factors under testing procedures as well as specifications for gasket materials, - to create a data basis for a data bank. Apart from improved technological co-operation in Europe, there will be a positive effect on the competitiveness in many areas of industry and improvements in environmental protection and working conditions. Achievements: The main conclusions which can be drawn from the project are the following: - New gasket sheet materials were developed and tests were performed in laboratory conditions. Most of these new materials are distinctly improved in view of e.g. tightening capability, creep strength and load bearing capacity compared to reference materials available on the market at the beginning of the project. - Gasket factors were defined which realistically describe the behaviour of gasket materials and which allow a realistic assessment of the gasket's performance. A gasket factor data bank is prepared. - Optimized gasket testing techniques were developed and fixed which guarantee a realistic assessment and evaluation of gasket's performance in view of tightening capability, load bearing, creep resistance and long term behaviour under the influence of time, temperature and medium and therefore a targeted development of new gasket materials; the description of these testing procedures will be the basis for a CEN standard on gasket testing. These testing techniques were evaluated by comparison of the results received with those of real flanged joint tests. Fairly good agreement was shown between gasket testing and flanged joint tests, so that the testing procedures can be looked as verified. Figures of gasket factors - related to leak rate or tightness - are determined which allow combined with the new European calculation code pr EN 1591 a strength and tightness analysis of flanged joints. These results can be the basis for gasket factor classification in the CEN calculation code per EN 1591.
Das Projekt "Transition Location Effect on Shock Wave Boundary Layer Interaction (TFAST)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: Polskiej Akademii Nauk, Instytut Maszyn Przeptywowych.Vision-2020, whose objectives include the reduction of emissions and a more effective transport systems, puts severe demands on aircraft velocity and weight. These require an increased load on wings and aero-engine components. The greening of air transport systems means a reduction of drag and losses, which can be obtained by keeping laminar boundary layers on external and internal airplane parts. Increased loads make supersonic flow velocities more prevalent and are inherently connected to the appearance of shock waves, which in turn may interact with a laminar boundary layer. Such an interaction can quickly cause flow separation, which is highly detrimental to aircraft performance, and poses a threat to safety. In order to diminish the shock induced separation, the boundary layer at the point of interaction should be turbulent. The main objective of the TFAST project is to study the effect of transition location on the structure of interaction. The main question is how close the induced transition may be to the shock wave while still maintaining a typical turbulent character of interaction. The main study cases - shock waves on wings/profiles, turbine and compressor blades and supersonic intake flows - will help to answer open questions posed by the aeronautics industry and to tackle more complex applications. In addition to basic flow configurations, transition control methods (stream-wise vortex generators and electro-hydrodynamic actuators) will be investigated for controlling transition location, interaction induced separation and inherent flow unsteadiness. TFAST for the first time will provide a characterization and selection of appropriate flow control methods for transition induction as well as physical models of these devices. Emphasis will be placed on closely coupled experiments and numerical investigations to overcome weaknesses in both approaches.
Das Projekt "AEROdynamic Surfaces by advanced MUltifunctional COatings (AEROMUCO)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: EADS Deutschland GmbH, Innovation Works.The main objective of the AEROMUCO project is to develop and evaluate a number of alternative The high-speed airflow over aircraft can contain sand, water droplets, insects, ice crystals and other particles, and there thus exists a significant challenge to produce protective coatings for this varied and demanding environment. AEROMUCO will develop multifunctional coatings with both anti-contamination and anti-icing properties that will also protect the aircraf The multi-disciplinary approach will yield technological improvements beyond the state of the art through a structured, but innovative, research strategy. A comprehensive set of unique tests will be performed, including ice build-up tests (microscopic and full-scale icing wind tunnel tests), comparative rain erosion tests, abrasion tests, and an assessment of kinetic of enzyme processes.
Das Projekt "Engine representative internal cooling knowledge and applications (ERICKA)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: Rolls-Royce Deutschland Ltd & Co KG.The goal of ERICKA is to directly contribute to reductions in aircraft engine fuel consumption with a targeted contribution of 1Prozent reduction in SFC relative to engines currently in service. The fuel efficiency of a jet engine used for aircraft propulsion is dependent on the performance of many key engine components. One of the most important is the turbine whose efficiency has a large influence on the engine fuel consumption and hence its CO2 emissions. The turbine must operate with high efficiency in the most hostile environment in the engine. The design of turbine cooling systems remains one of the most challenging processes in engine development. Modern high-pressure turbine cooling systems invariably combine internal convection cooling with external film cooling in complex flow systems whose individual features interact in complex ways. The heat transfer and cooling processes active are at the limit of current understanding and engine designers rely heavily on empirical tools and engineering judgement to produce new designs. ERICKA will provide a means of improving turbine blade cooling technology that will reduce turbine blade cooling mass-flow relative to that required using existing technology. A reduction in cooling mass-flow leads directly to improved component and engine efficiency. The improved technology for turbine cooling developed by ERICKA will also enable low NOx combustion chambers to be included in future engines. ERICKA will undertake research to furnish better understanding of the complex flows used to internally cool rotating turbine blades. This will be achieved by: 1) Acquisition of high quality experimental data using static and rotating test facilities 2) Development of cooling design capability by enhancement of computer codes that will exploit these experimental data ERICKA groups 18 partners representing the European aero engine industry, five SMEs and a set of leading academic institutions. Prime Contractor: Rolls-Royce PLC; London; United Kingdom.
Das Projekt "Optimisation for Low Environmental Noise Impact Aircraft (OPENAIR)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: SNECMA MOTEURS SA.Reducing noise from aircraft operations perceived by airport neighbouring communities is a major challenge facing the aircraft manufacturing industry, social society and the air transport business. By adopting a whole aircraft approach based on the latest developments in active / adaptive technologies, flow control techniques and advances in computational aero-acoustics applied to the major causes of noise at source, OPENAIR aims to deliver a step change in noise reduction, beyond the SILENCE(R) achievements. The workplan clearly supports realistic exploitation of promising design concepts driven by noise reduction and will result in the development and validation up to TRL 5 of ?2nd Generation? technology solutions. OPENAIR?s multidisciplinary approach and composition is suited to the projected integrated, lightweight solutions. The process includes a down-selection in mid project. The selected technologies will be subjected to scaled rig tests, and the resulting data will support assessment of the noise reduction solutions on powerplant and airframe configurations across the current and future European range of products. The project exploitation plan will include detailed proposals for further demonstration in the Clean Sky JTI. The verification of the technologies applicability will be assured by addressing identified integration and environmental tradeoffs (performance, weight, emissions). In this way OPENAIR will develop solutions that can play a significant role, in continuity with the previous Generation 1 effort, enabling future products to meet the ACARE noise goals and improving current fleet noise levels through retrofitting. This capability is key to providing the flexibility needed to simultaneously accommodate market requirements in all segments, global traffic growth and environmental constraints, while addressing the global environmental research agenda of the EU. Prime Contractor: Snecma SA; Paris; France.
Das Projekt "Technologies enhancement for clean combustion in aero-engines (TECC-AE)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: Rolls-Royce Deutschland Ltd & Co KG.Due to continuous efforts through past and ongoing European projects, lean combustion by means of internally staged injectors now appears to be the promising technology for obtaining the required emission reductions compatible with a sustainable growth of aviation transport. (cf ACARE 2020). Recognising that putting into service such a technology as soon as possible is the only way to effectively reduce the aviation environmental impact, TECC-AE addresses some unavoidable issues in order to: - Solve the main limitations identified during past and ongoing projects appearing when lean combustion is pushed toward its maximum potential about NOx emissions reduction. In particular, TECC-AE will a) Provide full combustor operability in terms of ignition, altitude relight and weak extinction performance b) Suppress the occurrence of thermo-acoustic instabilities by reducing the combustor sensitivity to unsteady features to a level such instabilities will not happen - Ensure injection system robustness with respect to coking that can appears during transient operations of the engine. - Optimise the combustion system s operational and environmental performance through all the flight phases - Develop, demonstrate and validate design rules, CFD capabilities and scaling laws. Prime Contractor: SNECMA SA; Paris; France.
Das Projekt "Validation of radical engine architecture systems (DREAM)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: Rolls-Royce Deutschland Ltd & Co KG.Since the publication of the ACARE goals, the commercial and political pressure to reduce CO2 has increased considerably. DREAM is the response of the aero-engine community to this pressure. The first major DREAM objective is to design, integrate and validate new engine concepts based on open rotor contra-rotating architectures to reduce fuel consumption and CO2 emissions 7Prozent beyond the ACARE 2020 objectives. Open rotors are noisier than equivalent high bypass ratio turbofan engines, therefore it is necessary to provide solutions that will meet noise ICAO certification standards. The second major DREAM objective is a 3dB noise emission reduction per operation point for the engine alone compared to the Year 2000 engine reference. These breakthroughs will be achieved by designing and rig testing: Innovative engine concepts a geared and a direct drive contra-rotating open rotor (unducted propulsion system) Enabling architectures with novel active and passive engine systems to reduce vibrations These technologies will support the development of future open rotor engines but also more traditional ducted turbofan engines. DREAM will also develop specifications for alternative fuels for aero-engines and then characterise, assess and test several potential fuels. This will be followed by a demonstration that the selected fuels can be used in aero-engines. The DREAM technologies will then be integrated and the engine concepts together with alternative fuels usage assessed through an enhanced version of the TERA tool developed in VITAL and NEWAC. DREAM is led by Rolls-Royce and is made of 47 partners from 13 countries, providing the best expertise and capability from the EU aeronautics industry and Russia. DREAM will mature technologies that offer the potential to go beyond the ACARE objectives for SFC, achieving a TRL of 4-5. These technologies are candidates to be brought to a higher TRL level within the scope of the CLEAN SKY JTI. Prime Contractor: Rolls Royce PLC; London; United Kingdom.
Das Projekt "Main Annulus Gas Path Interactions (MAGPI)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: Rolls-Royce Deutschland Ltd & Co KG.In a modern aero engine, up to 20Prozent of the main annulus flow is bled off to perform cooling and sealing functions. The vicinity of these bleed ports and flow sinks is characterised by complex unsteady swirling flows, which are not fully understood. Even the most up-to-date numerical tools have difficulties predicting the behaviour of the secondary flow system when interacting with the main annulus. The project addresses interactions between main gas path and secondary flow systems in commercial gas turbines in response to Research Activity AERO-2005-1.3.1.2a Concepts and technologies for improving engine thermal efficiency and reducing secondary air losses. Experiments are planned on turbine disc rim and compressor manifold cavity heat transfer, hot gas ingestion, and spoiling effects of cooling air flow and their impact on turbine and compressor performance, as well as a reduction of secondary air losses. The experimental data will be used for better understanding of the complex flow phenomena and improvements of platform and cavity design. Furthermore, the industrial partners will validate their design tools with these test data and improve their prediction capability of secondary flow systems when interacting with the main gas path. The expected results are a reduction of cooling and sealing airflow rates, improvements of the turbine and compressor efficiency and increase of the safety margin of the engine components by better cooling. Expected technical results are: - Knowledge of the interaction phenomena and its effect on cavity heat transfer, spoiling and performance, - Experimental results for validation of improved numerical tools for secondary flow systems, - Optimised design methods and CFD best practice guidelines. The targeted outcome will contribute to the ACARE goal of reduced CO2 emissions via reduced fuel burn of 2Prozent to improve the environment and strengthening the competitiveness of European gas turbine manufacturers.
Das Projekt "New Aero Engine Core Concepts (NEWAC)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: Rolls-Royce Deutschland Ltd & Co KG.NEWAC will provide a step change for low emission engines by introducing new innovative core configurations to strongly reduce CO2 and NOx emissions. This breakthrough will be achieved by developing and validating new core configurations using heat management (intercooler, cooling air cooler, recuperator), improved combustion, active systems and improved core components. NEWAC will design and manufacture these innovative components and perform model, rig and core tests to validate the critical technologies. The NEWAC core configurations include an Inter-cooled Recuperative Aero engine (IRA) operating at low overall pressure ratio (OPR), an inter-cooled core configuration operating at high OPR, an active core and a flow controlled core operating at medium OPR. NEWAC will complement past and existing EC projects in the field, e.g. EEFAE in FP5 and VITAL in FP6. The main result will be fully validated new technologies enabling a 6Prozent reduction in CO2 emissions and a further 16Prozent reduction in NOx relative to ICAO-LTO cycle. Most importantly, the project will address the challenges involved in delivering these benefits simultaneously. NEWAC will deliver together with EEFAE (-11Prozent CO2, -60Prozent NOx), national programs and expected results of VITAL, the overall CO2 reduction of 20Prozent and the NOx reduction close to 80Prozent at a technology readiness level of 5, contributing to the attainment of the ACARE targets. NEWAC will achieve this technology breakthrough by integrating 41 actors from the European leading engine manufacturers, the engine-industry supply chain, key European research institutes and SMEs with specific expertise. The advance and benefits that NEWAC will bring to Europe in terms of more efficient and environmental-friendly air transport will be disseminated widely to all stakeholders. Furthermore a training programme will ensure the transfer of expertise and knowledge to the wider research community and especially to the new member states of the EU.
Das Projekt "Advanced turbulence simulation for aerodynamic application challenges (ATAAC)" wird/wurde gefördert durch: Kommission der Europäischen Gemeinschaften Brüssel. Es wird/wurde ausgeführt durch: Deutsches Zentrum für Luft- und Raumfahrt e.V..The ATAAC project aims at improvements to Computational Fluid Dynamics (CFD) methods for aerodynamic flows used in today's aeronautical industry. The accuracy of these is limited by insufficient capabilities of the turbulence modelling / simulation approaches available, especially at the high Reynolds numbers typical of real-life flows. As LES will not be affordable for such flows in the next 4 decades, ATAAC focuses on approaches below the LES level, namely Differential Reynolds Stress Models (DRSM), advanced Unsteady RANS models (URANS), including Scale-Adaptive Simulation (SAS), Wall-Modelled LES, and different hybrid RANS-LES coupling schemes, including the latest versions of DES and Embedded LES. The resources of the project will be concentrated exclusively on flows for which the current models fail to provide sufficient accuracy, e.g. in stalled flows, high lift applications, swirling flows (delta wings, trailing vortices), buffet etc. The assessment and improvement process will follow thoroughly conceived roadmaps linking practical goals with corresponding industrial application challenges and with modelling/simulation issues through stepping stones represented by appropriate generic test cases. The final goals of ATAAC are: - to recommend one or at most two best DRSM for conventional RANS and URANS- to provide a small set of hybrid RANS-LES and SAS methods that can be used as reference turbulence-resolving approaches in future CFD design tools - to formulate clear indications of areas of applicability and uncertainty of the proposed approaches for aerodynamic applications in industrial CFD - Contributing to reliable industrial CFD tools, ATAAC will have a direct impact on the predictive capabilities in design and optimisation, and directly contribute to the development of Greener Aircraft.
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