Date of Award
Spring 2015
Access Type
Thesis - Open Access
Degree Name
Master of Science in Aerospace Engineering
Department
Graduate Studies
Committee Chair
Dr. Magdy Attia
First Committee Member
Dr. Scott Martin
Second Committee Member
Dr. Anastasios Lyrintzis
Abstract
Microturbines and small gas turbines are often an attractive option for turbo-hybryd application research in aviation due to their simple design and high power to weight ratio. However, the low operating pressure ratios of microturbines leads to low thermal efficiency, which results in very high fuel consumption. Higher operating pressure ratios in microturbines could vastly improve their current fuel efficiency. This thesis focuses on developing a compact, single stage 8:1 pressure ratio centrifugal compressor stage designed to meet the high-pressure ratio requirements of microturbines and small gas turbine engines in turbo hybrid-electric propulsion applications. The first stage vaned diffuser was modified to include a scalloped leading edge ridge to aid stage total-total compression efficiency improvement. A full 3D Navier-Strokes based CDF solver was used in estimating the delta increase in device total-total efficiency due to scalloped leading edge, from the baseline configuration. The solution obtained using CFD was also used to investigate the ameliorating effects of the scallop ridge.
Scholarly Commons Citation
Gehlot, Vinod Poonamchand, "Scalloped Leading Edge Vaned Diffuser Analysis for a Compact High Pressure Ratio Centrifugal Compressor" (2015). Doctoral Dissertations and Master's Theses. 268.
https://commons.erau.edu/edt/268
