VORTEX EFFECTS IN A TURBINE STAGE,
Abstract
Experimental and calculated relationships characterizing the uneven distribution of stagnation temperatures in the viscous gas behind the vane grid of a turbine are presented. Evaluation of turbulent effects in a turbine is carried out to achieve better understanding of the actual structure (thermal and dynamic) of turbine flow. Two related problems arise in calculation of the uneven distribution of stagnation temperatures through the radius of a stage. The first problem is that of determining the method of calculation, permitting an approximation of the magnitude of the specified nonuniformity which is dependent on basic modes and geometrical parameters of a stage. The second is the insertion of related correction into the aerodynamic calculation of flow turbulence. By experimenting, several preliminary appraisals of the energy distribution behind the axial-type vane grid are made. The method proposed for evaluating stagnation temperature inhomogeneity in the nozzle grid is found entirely approximate and its error must be tested thoroughly with experiments. When experimenting with grids and high-spin stages with large M numbers, it is necessary to measure the stagnation temperature in the gap and behind the stage. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 09, 1967
- Accession Number
- AD0668511
Entities
People
- E. E. Likherzak
- M. E. Deich
Organizations
- National Air and Space Intelligence Center