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Module Development Konstantinos G. Kyprianidis The plant cost code has been developed by the University of Stuttgart and its aim is to calculate the production cost of a given engine design. This comprises scaling of a single configuration to new design constraints. The major part of the development was carried out within the VITAL project, while new models for individual components (active cooling air cooler, intercooler, recuperator, com- bustor injectors, air cooled oil cooler and manifolds) have been introduced within the NEWAC project. The output of the model is to be understood as production cost only which reflects realistic cost trending and scaling but does not predict ab- solute cost or selling prices. A meaningful comparison of cost is only achieved by looking at direct production cost while assuming equal manufacturing conditions for all investigated engines. The plant cost model uses a fully object-orientated approach in modelling production cost. This approach was chosen because an improved level of modelling flexibility is achieved; almost every possible engine configuration can be represented. To derive this kind of modelling, the break- down of an aero engine product structure was first analysed [170]. All classes of parts with similar properties, and production cost calculation schemes, were identified. These part classes are represented as objects within the plant cost model and can be assembled to modules (according to the TERA2020 defined bookkeeping) in a flexible manner. 3.6.3 SOPRANO The SOPRANO software was developed within the European Framework 6 col- laborative project SILENCER by the Spanish consultancy company ANOTEC. The SOPRANO code will allow the assessment of noise generation at the en- gine/aircraft level by means of a number of semi-empirical correlations such as fan inlet and aft noise, airframe noise, combustor and turbine noise and jet noise. The current implementation of the SOPRANO code does not consider open rotor propeller or ducted counter rotating fan noise modelling. Models for the former are developed within the DREAM project by Aristotle University of Thessa- loniki, while models for the latter have been developed within the the VITAL project by ISAE/SUPAERO. The noise prediction methods utilised in VITAL and NEWAC are summarized in Table 3.7. Most of the existing methods have been calibrated with data from previous and in-service engines. As new and different engine concepts are being investigated, the input conditions may be out of the validity range of the methods. Some of the models are then extrapolated 76PDF Image | Multi-disciplinary conceptual design of future jet engine systems
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