Einfluss der durch moderne Herstellungsverfahren erzeugten Oberflaechenrauhigkeiten auf das Stroemungsverhalten von Verdichtergittern (Influence of Surface Roughness Generated by Modern Production Processes on the Flow Process of Compressor Grids)
Abstract
The dissertation opens with a review of the influence of (surface) roughness in various contexts, from the theoretical, such as in simple geometry, and compressor performance statistics. A detailing of the trial construction within a high-speed cascade tunnel is followed by the measurement and transfer of roughness in modern production processes. The second half of the dissertation is devoted entirely to experiments. Firstly, the author investigates the influence of surface roughness on: (1) isotropic profile Mach critical velocity ration distributions; (2) total pressure loss correction values; (3) boundary layer development; (4) turbulence in the boundary layer. Secondly, he undertakes numerical experiments with the Alfa II and the Alpha 3.0 calculation methods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2000
- Accession Number
- ADA407988
Entities
People
- Robert Leipold