Pilot study for modelling gas turbine component behaviour: Part VII: Inventory of European activities (summary of AGARD publications)

Abstract

In order to position the activities at NLR on the hot flow modelling and testing of gas turbine components a survey has been made of current activities in Europe outside the Netherlands. The present report is confined to activities on turbine blades and vanes because this has the first priority at NLR, considering the national market (blade life assessment, coatings). As the primary source for such information the conference proceedings and lecture series from 1985 to 1994 have been used, published by the Propulsion and Energetics Panel of AGARD. This approach excludes marine and land based gas turbines. The general approach is to use aerothermodynamic prediction models verified by experiments at moderate temperatures and at realistic Reynolds numbers. The results are used for the prediction of the heat transfer and the resulting temperature distribution in the blades. High temperature testing is very expensive if performed at realistic Reynolds numbers. For life cycle demonstration testing material temperature transients must be duplicated. In that case a cyclic test facility of the burner rig type at NLR may be quite acceptable notwithstanding its Reynolds number is low compared to the full scale engine. Aerodynamic prediction methods are increasingly based on 3-D Navier-Stokes codes. The work at SNECMA and DLR-Köln are of particular interest. For experimentzd work that includes the blade material Volvo-Flygmotor may be of particular interest for the activities developed at NLR.