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GREEN ISSUES

November 20, 2008 by

GREEN ISSUES

Web Page sponsor Hobson Industries

Asset Managed Parts help our environment by saving energy and natural resources.

www.hobsonindustries.co.uk

18 Nov 08. Today’s signature of Clean Sky’s first Grant Agreements provides a sound framework for a new way of performing research through Public Private Partnerships. Clean Sky will accelerate the introduction of new, radically greener technologies in future generations of aircraft. The first Grant Agreement of the Clean Sky JTI (Joint Technology Initiative) has been signed today and celebrated at the European Aviation Summit in Bordeaux, by the JTI’s twelve leaders (AgustaWestland, Airbus, AleniaAeronautica, Dassault Aviation, EADS Casa, Eurocopter, Fraunhofer Gesellschaft, Liebherr, Rolls-Royce, SAAB, Safran and Thales) and the European Commission. “In 2008, major steps have been completed with Clean Sky’s official launch in February, the setting up of the Governing Board in May, the start of activities in June and now the finalisation of the contractual framework. We are on track to bring the programme fully up to speed and to achieve the ambitious objectives of Clean Sky” said Marc Ventre, Chairman of the Clean Sky Governing Board, and CEO of the Aerospace Propulsion Division of SAFRAN. Clean Sky is one of the largest European research programmes ever, with a budget estimated at €1.6bn over seven years, contributed equally by the European Commission and industry. Clean Sky will be a major contributor to meet by 2020 the environmental goals set by ACARE (Advisory Council for Aeronautics Research in Europe): 50% reduction of CO2 emissions, 80% reduction of NOx emissions (Nitrogen Oxides), 50% reduction of external noise and a green product life cycle.

18 Nov 08. Ricardo today announced the launch of WAVE-RT, the first version of Ricardo’s leading engine simulation product specifically designed to enable highly accurate real-time simulation to become an embedded part of the engine management system development process. With wave propagation effects fully captured, the transient response of the model is much closer to that of the real engine than would be the case with mean-value engine models typically used to date for this application. WAVE-RT thus enables validation of strategies to perform close control of engine performance during transients, and the accuracy of its airflow simulation allows development of concepts such as variable valve timing and lift control including more unusual examples such as negative overlap for controlled auto-ignition or for camless engine control. The fact that individual cylinders are separately represented also enables the development and validation of complex control strategies such as closed-loop combustion control, fully accounting for variations between cylinders arising from the different air paths and hence key associated variables such as air mass and residuals or exhaust temperature. Because the WAVE-RT model is automatically generated from an existing high resolution and previously validated donor WAVE engine model, there is very little calibration needed to produce the real-time model. The physical nature of the model means that engine faults are immediately transparent, allowing more rapid and thorough testing of on-board diagnostics and potentially enabling its use as an air-flow estimator for next-generation model-based control strategies. The key CAE process benefit compared to previous methods is the automatic conversion from a WAVE model to real-time format using WaveBuild. This is inherently quicker and more repeatable than creating a large multi-dimensional map or indeed, any other interpretive process. Additionally, if the design of the engine changes in a fundamental way, the new model can be created from the engine design model at the click of a button. Repetition of 1D
simulations or test-bed experiments is not required, and the effort required to calibrate the model is effectively removed. The sp

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