Redesign Of The Last Two Stages Of A Mechanical Drive Steam Turbine.
Abstract
A six stage mechanical drive steam turbine rated at 13,300 hp
was installed at a petroleum facility in Texas to drive a multistage
centrifugal compressor used in recycle gas service on a high
pressure hydrogen cracker. Since its installation, there has been a
failure of either the fifth or sixth stage blades at intervals of 18
months to two years. The blades failed due to high cycle fatigue
initiating in the dovetail root attachment.
To alleviate this problem, wider, more robust blades with
improved aerodynamics were designed, which include Z-shrouds
and a new root dovetail attachment with a lower stress
concentration.
Description
LecturePg. 119-128
Subject
TurbomachinesCollections
Citation
Henry, David A.; DiCristoforo, Paul E.; Ewer, Timothy J.; Mindock, Michael (1998). Redesign Of The Last Two Stages Of A Mechanical Drive Steam Turbine.. Texas A&M University. Turbomachinery Laboratories. Available electronically from https : / /hdl .handle .net /1969 .1 /163411.