Experimental Study on Abrasive Waterjet Polishing of Hydraulic Turbine Blades

27th IAHR Symposium on Hydraulic Machinery and Systems

Khakpour, H.^1 ; Birglenl, L.^1 ; Tahan, A.^2 ; Paquet, F.^3

Mechanical Engineering Department, Ecole Polytechnique de Montreal, H3T 1J4, Canada^1

Mechanical Engineering Department, Ecole de Technologie Superieure, Montreal

H3C 1K3, Canada^2

Hydraulic Engineering Department, ALSTOM Canada, Sorel-Tracy

J3R 3L2, Canada^3

关键词: Abrasive water-jet;    Controlled polishing;    Experimental investigations;    Experimental test;    Hydraulic turbine blade;    L18 orthogonal array;    Polished surfaces;    Polishing techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/22/5/052016/pdf
DOI  :  10.1088/1755-1315/22/5/052016

来源: IOP

【 摘 要 】

In this paper, an experimental investigation is implemented on the abrasive waterjet polishing technique to evaluate its capability in polishing of surfaces and edges of hydraulic turbine blades. For this, the properties of this method are studied and the main parameters affecting its performance are determined. Then, an experimental test-rig is designed, manufactured and tested to be used in this study. This test-rig can be used to polish linear and planar areas on the surface of the desired workpieces. Considering the number of parameters and their levels, the Taguchi method is used to design the preliminary experiments. All experiments are then implemented according to the Taguchi L18orthogonal array. The signal-to-noise ratios obtained from the results of these experiments are used to determine the importance of the controlled polishing parameters on the final quality of the polished surface. The evaluations on these ratios reveal that the nozzle angle and the nozzle diameter have the most important impact on the results. The outcomes of these experiments can be used as a basis to design a more precise set of experiments in which the optimal values of each parameter can be estimated.