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Air forces and moments on triangular and related wings with subsonic leading edges oscillating in supersonic potential flowThis analysis treats the air forces and moments in supersonic potential flow on oscillating triangular wings and a series of sweptback and arrow wings with subsonic leading edges and supersonic trailing edges. For the wings undergoing sinusoidal torsional oscillations simultaneously with vertical translations, the linearized velocity potential is derived in the form of a power series in terms of a frequency parameter. This method can be useful for treatment of similar problems for other plan forms and for wings undergoing other sinusoidal motions. For triangular wings, as many terms of such a series expansion as may be derived can be determined; however, the terms after the first few become very cumbersome. Closed expressions that include the reduced frequency to the fifth power, an order which is sufficient for a large class of practical application, are given for the velocity potential and for the components of chordwise section force and moment coefficients. These wings are found to exhibit the possibility of undamped torsional oscillations for certain ranges of Mach number and locations of the axis of rotation. The ranges of these parameters are delineated for triangular wings.
Document ID
19930092138
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Watkins, Charles E
Berman, Julian N
Date Acquired
September 6, 2013
Publication Date
January 1, 1952
Report/Patent Number
NACA-TR-1099
Report Number: NACA-TR-1099
Accession Number
93R21428
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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