Degree Type
Dissertation
Date of Award
1987
Degree Name
Doctor of Philosophy
Department
Mechanical Engineering
Abstract
A large-scale, low-speed, axial-turbine cascade was designed using a fast interactive design code and tested over a range of turbulence level and incidence angle for Reynolds numbers typically present in gas turbines. In all, 36 test conditions were examined;Testing was done primarily to investigate the profile boundary layer development under different inlet flow conditions. Glue-on hot-film gages and surface flow visualizations were used to identify transition and separation over the airfoil surface. In addition to transition measurements, overall cascade performance was determined from static pressure distributions on the airfoil and detailed five-hole pressure probe and hot-wire probe traverses in an exit plane of the cascade;The measured transition start and end points were compared against predictions using existing transition models. Also, the measured losses were compared against predicted losses from boundary layer calculations based on dissipation integral and finite difference analyses.
DOI
https://doi.org/10.31274/rtd-180813-10602
Publisher
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Copyright Owner
S.B. Vijayaraghavan
Copyright Date
1987
Language
en
Proquest ID
AAI8716834
File Format
application/pdf
File Size
292 pages
Recommended Citation
Vijayaraghavan, S. B., "Effects of free stream turbulence, Reynolds number, and incidence angle on axial turbine cascade performance " (1987). Retrospective Theses and Dissertations. 11656.
https://lib.dr.iastate.edu/rtd/11656
