Identification of Steam Leakage Pathways in Cylinder Middle Face based on α-shape Algorithm and Flood-fill Method
During steam turbine operation,the thermal change of the cylinder body structure caused the redistribution of the contact stress of the cylinder middle face(hereinafter referred to as the middle face),which in turn generated leakage pathways,significantly affecting the energy efficiency and safety of the turbine.In this paper,a leakage pathway identification method was proposed based on the α-shape algorithm and the flood-fill method.The boundaries of the middle face were segmented by α-shape algo-rithm,and the seal failure regions of the middle face were divided by flood-fill method.Leakage pathways were identified by detecting whether each seal failure region was connected to more than one boundary.The result shows that most of the 21 seal failure areas identified by spatial distribution do not affect the sealing performance,and only 2 areas form leakage pathways.