NDLI: Unsteady analysis of rotor blade tip flow

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Unsteady analysis of rotor blade tip flow

Content Provider	NASA Technical Reports Server (NTRS)
Author	Rao, B. M. Maskey, B.
Copyright Year	1985
Description	The development of the VSAERO-TS and VSAERO-H computer programs for calculating the unsteady aerodynamic characteristics of arbitrarily shaped wings oscillating in pitch is presented. The effect of several wake parameters on chordwise pressure distribution in VSAERO-TS is given and the convergence characteristics of both programs are discussed. In the program, the influence coefficient for each panel is formulated for a planar surface and so a skewed panel is represented by a projected flat quadrilateral lying in the mean plane. Since panels in the extreme roll-up region of the tip vortex are highly skewed the program was modified to treat each highly skewed panel as a pair of triangles. The programs are validated by comparing the chordwise pressure distribution of several blade tip planforms with experimental data. The comparison, for the most part, is good. The triangular panel representation improved the chordwise pressure distribution near the tip region for higher mean angle of attack.
File Size	1637728
Page Count	56
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19850016891
Archival Resource Key	ark:/13960/t40s4nh98
Language	English
Publisher Date	1985-05-01
Access Restriction	Open
Subject Keyword	Aerodynamics Harmonics Blade Tips Panel Method Fluid Dynamics Unsteady Aerodynamics Pressure Distribution Time Marching Unsteady Flow Aerodynamic Characteristics Rotary Wings Computer Programs Helicopter Wakes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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