Shock Representation by Euler Throughflow Models and Comparison With Pitch-Averaged Navier-Stokes Solutions
Abstract
The shock capturing properties of the axisymmetric Euler throughflow equations in design mode (imposed swirl) and in analysis mode (imposed flow angle) are examined through formulation of the Rankine-Hugoniot relations. A new, hybrid mode is constructed that combines properties of the two classical modes. The consequences of the different shock representation in the several modes are illustrated for five characteristic operating points covering the complete design speed performance curve of a transonic axial compressor rotor. Circumferentially averaged 3D Navier-Stokes solutions serve as a reference. A comprehensive comparison of the throughflow and averaged 3D flow fields is presented. The analysis mode, due to captured shocks, predicts a wrong flow field inside the blade passage, yet is reasonably accurate globally. The design and hybrid modes, due to identical shock capturing properties, give near-identical solutions, which are in excellent agreement with the pitch-averaged 3D reference solutions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 10, 1999
- Accession Number
- ADA373363
Entities
People
- A. Sturrnayr
- Ch. Hirsch