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| Title: |
Observations of dynamic stall phenomena using liquid crystal coatings
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| Author(s): |
Reda, Daniel C.
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| Abstract: |
Novel, shear stress-sensitive/temperature-insensitive liquid crystal coatings have been applied to the surface of an oscillating airfoil in order to ascertain the unsteady fluid physics associated with the dynamic-stall process. Surface microtufts and laser sheet/smoke-particle flow visualization were used to compare the liquid-crystal results. Boundary-layer transition and turbulent separation locations were measured as a function of geometric angle of attack. The results obtained are compared with Eppler (1980) aerodynamic design code predictions.
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| NASA Center: |
Ames Research Center
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| Publication Date: |
Feb 1, 1991
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| Document Source: |
Other Sources |
| No Digital Version Available: |
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| Document ID: |
19910043297
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| Accession ID: |
91A27920
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| Publication Information: |
AIAA Journal, 29, 308-310, ISSN 0001-1452, Number of Pages = 3 |
| Keywords: |
AERODYNAMIC STALLING; AIRFOIL OSCILLATIONS; LIQUID CRYSTALS; PROTECTIVE COATINGS; UNSTEADY AERODYNAMICS; BOUNDARY LAYER TRANSITION; FLOW VISUALIZATION; SEPARATED FLOW; SHEAR STRESS; SURFACE PROPERTIES; VISCOUS FLOW;
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| Notes: |
AIAA Journal (ISSN 0001-1452), vol. 29, Feb. 1991, p. 308-310. |
| Accessibility: |
Unclassified; Copyright; Unlimited; Publicly available; |
| Updated/Added to NTRS: |
2004-11-03 |
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