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Processing and Properties of Steel Foam Sandwiches
Lefebvre Louis-Philippe,Gauthier Maxime,Baril Eric,Voizelle Benoit 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Metallic foams have a combination of attractive properties such as high specific mechanical properties and good energy absorption characteristics. This paper presents the properties of steel foam sandwiches produced using powder metallurgy approach. Metallic powder, solid polymeric binder and a foaming agent are dry-mixed and molded into the desired shape. The molded powder mix is then heat-treated to foam, debind and sinter the material. The resulting material has an open cell structure with high porosity. The structure and properties of sandwiches specimens produced with the process are presented and discussed.
Flow simulation and efficiency hill chart prediction for a Propeller turbine
Vu, Thi,Koller, Marcel,Gauthier, Maxime,Deschenes, Claire Korean Society for Fluid machinery 2011 International journal of fluid machinery and syste Vol.4 No.2
In the present paper, we focus on the flow computation of a low head Propeller turbine at a wide range of design and off-design operating conditions. First, we will present the results on the efficiency hill chart prediction of the Propeller turbine and discuss the consequences of using non-homologous blade geometries for the CFD simulation. The flow characteristics of the entire turbine will be also investigated and compared with experimental data at different measurement planes. Two operating conditions are selected, the first one at the best efficiency point and the second one at part load condition. At the same time, for the same selected operating points, the numerical results for the entire turbine simulation will be compared with flow simulation with our standard stage calculation approach which includes only guide vane, runner and draft tube geometries.