Download or read book Application of an Unstructured Grid Navier Stokes Solver to a Generic Helicopter Boby written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: An unstructured-grid Navier-Stokes solver was used to predict the surface pressure distribution, the off-body flow field, the surface flow pattern, and integrated lift and drag coefficients on the ROBIN configuration (a generic helicopter) without a rotor at four angles of attack. The results are compared to those predicted by two structured- grid Navier-Stokes solvers and to experimental surface pressure distributions. The surface pressure distributions from the unstructured-grid Navier-Stokes solver are in good agreement with the results from the structured-grid Navier-Stokes solvers. Agreement with the experimental pressure coefficients is good over the forward portion of the body. However, agreement is poor on the lower portion of the mid-section of the body. Comparison of the predicted surface flow patterns showed similar regions of separated flow. Predicted lift and drag coefficients were in fair agreement with each other.Mineck, Raymond E.Langley Research CenterUNSTRUCTURED GRIDS (MATHEMATICS); PRESSURE DISTRIBUTION; FLOW DISTRIBUTION; SEPARATED FLOW; PRESSURE RATIO; AERODYNAMIC DRAG; NAVIER-STOKES EQUATION; STRUCTURED GRIDS (MATHEMATICS); ROTORS; LIFT; ANGLE OF ATTACK; AERODYNAMIC COEFFICIENTS

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