QUESTION OF THE ELASTIC AND PLASTIC STRESS CONDITION OF BLADES UNDER THERMAL SHOCK. INVESTIGATION OF THERMAL FATIGUE OF BLADES AND DISKS OF CENTRIPETAL GAS TURBINES. NATURAL TESTING OF THE WORKING WHEEL OF A CENTRIPETAL GAS TURBINE UNDER CONDITIONS OF REPEATED STARTS.
Abstract
Three reports are included: (1) investigation of elastic-plastic stressed state of a guide blade at various operating regimes of a gas turbine; six equations are developed; values are given for relative strain in separate points; (2) study of thermal fatigue of blades and disks of centripetal gas turbines, clarifying thegeneral problem of cracks in working wheels of the CGT; and (3) natural testing of a CGT working wheel under repeated starting conditions (nonstationary conditions); actual tests were made with turbine on stand, and operating of combustion chamber gases. Before and at intervals during the tests, the turbocompressor was dismantled and the wheel was visually inspected for cracks. The tests showed that the fractures in various wheels are associated with thermal fatigue. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1966
- Accession Number
- AD0634816
Entities
Organizations
- United States Army Foreign Science and Technology Center