Topic
Pitching moment
About: Pitching moment is a research topic. Over the lifetime, 3213 publications have been published within this topic receiving 38721 citations.
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TL;DR: This paper presents a numerical method for constrained aerodynamic shape optimization problems based on simultaneous pseudo-timestepping in which stationary states are obtained by solving the pseudo-stationary system of equations representing the state, costate, and design equations.
Abstract: This paper presents a numerical method for constrained aerodynamic shape optimization problems. It is based on simultaneous pseudo-timestepping in which stationary states are obtained by solving the pseudo-stationary system of equations representing the state, costate, and design equations. The main advantages of this method are that it blends in nicely with a previously existing pseudo-timestepping method for the states only, and that a preconditioner can be used for convergence acceleration which stems from the reduced SQP methods. Design examples for drag reduction with constant lift and drag reduction with constant pitching moment for an RAE2822 airfoil are included. The overall cost of computation is 4--8 times that of the forward simulation runs depending on the grid size and the number of design parameters.
35 citations
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35 citations
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TL;DR: In this paper, wind tunnel experiments are conducted using membrane wings and rigid flat-plates in ground-effect at a moderate Reynolds number of Re = 56 000 with ground clearances from 1% to 200% chord length measured from their trailing-edge.
34 citations
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34 citations
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TL;DR: In this article, the aeroelastic behavior of a joined-wing PrandtlPlane configuration is investigated and the energy transfer between fluid and structure is carried out; the areas in which energy is extracted from the fluid are identified to gain insights on the mechanism leading to the instability.
34 citations