Rotary-Wing Aerodynamics by W. Z. Stepniewski

Author:W. Z. Stepniewski
Language: eng
Format: epub
Publisher: INscribe Digital
Published: 1984-02-29T16:00:00+00:00

Figure 5.31 Conceptual model for body with separated flow

As to the determination of the separation line, this is usually done by first assuming that the flow around the body is unseparated. On this basis, velocities and pressure variations are computed along the streamlines. Regions of the body surface where the adverse pressure gradient is high are designated as areas having a high probability of flow separation. The actual procedure for determining the line of separation is described by Strieker and Polz27.

Combination of Nonlifting and Lifting Bodies. A combination of nonlifting (e.g., fuselage) and lifting (e.g., wings and empennage) bodies represents still another modeling problem. Even assuming for simplicity that there is no flow separation on either of these components, sources can not be used as the sole building blocks of the conceptual model. This is due to the fact that the existence of lift requires the presence of circulation which, in turn, can be modeled by either vortices or doublets. Fig 5.3223 illustrates a model of the fuselage-wing combination.

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