Natural frequencies of turbine blades connected loosely by tie-wires.

Study of the Effects of Lacing Rods Location on Natural Frequencies in Last Stage Blades of a Steam Turbine

In this study, effects of lacing rods location on natural frequencies of last stage of a Steam Turbine Blades (STBs) have been investigated. STBs are critical and important elements in a turbine as well as power plants. One of the most important parameters in turbine blades is lacing rods location. In this paper, first, a three dimensional (3D) scan was used to produce the geometrical model of ...

Experimental Investigation and Analysis of Manufacturing Wind Turbine Blades Produced by Hydroforming of Aluminum Alloy AA5754

Development of new technologies and combined with creativity and innovation, plays the fundamental role in developing of any community′s value. Thus, in this research the design and production of hydroforming device was introduced. One of the best and most efficient technologies in the world of metal forming is wind turbine blade producing with hydroforming method which seems as an innovative m...

Scheduling loosely connected task graphs

We present a polynomial time algorithm for precedence constrained scheduling problems in which the task graph can be partitioned into large disjoint parts by removing edges with high oat, where the oat of an edge is deened as the diierence between the length of the longest path in the graph and the length of the longest path containing the edge. Our algorithm guarantees schedules within a facto...

Optimum Shape Design of Turbine Blades?

Evaluation of Turbine Blades Using Computed Tomography

Turbine blades are high value castings having complex internal geometry. Computed Tomography has been employed on Turbine blades for finding out defects and internal details. The wall thickness, rib thickness and radius of curvature are measured from the CT slices. The discontinuities including blockages of cooling passages in the cast material can be detected. 3D visualization of the turbine b...