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Description
Title: | Post stall propeller behavior at low Reynolds numbers |
Author(s): | Uhlig, Daniel V. |
Advisor(s): | Selig, Michael S. |
Department / Program: | Aerospace Engineering |
Discipline: | Aerospace Engineering |
Degree Granting Institution: | University of Illinois at Urbana-Champaign University of Illinois at Urbana-Champaign |
Degree: | M.S. |
Genre: | Thesis |
Subject(s): | Post stall aerodynamics
propeller aerodynamics low Reynolds number stall delay |
Abstract: | Limited data exists for propeller and wind turbine post stall aerodynamics. Post stall aerodynamics was observed in small propellers at low Reynolds numbers. First, performance data (thrust, power, and efficiency) of set variable pitch propellers was acquired in a wind tunnel. The propellers were 6 to 9.9 inches in diameter and were able to pitch to extreme angles. Second detailed geometric characteristics (pitch, chord, airfoil) of the propellers were measured. Finally PROPID was used to simulate the propellers and predict the performance. Comparing the experimental and calculated results identified regions where post stall aerodynamics affected propeller performance. This understanding will assist in predicting post stall aerodynamics on small scale propellers. In addition three small propellers with tiplets similar to winglets on wings were tested and compared to traditionally tipped propellers. This comparison showed better designed traditional propellers were more efficient, but that tiplets improved performance of the specific propellers. |
Issue Date: | 2007 |
Type: | Text |
Language: | English |
URI: | http://hdl.handle.net/2142/48916 |
Rights Information: | Copyright 2007 Daniel V. Uhlig |
Date Available in IDEALS: | 2014-04-24 |
This item appears in the following Collection(s)
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Dissertations and Theses - Aerospace Engineering
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Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois