Numerical Study of Turbulence Model Predictions for the Md 30p/30n and Nhlp-2d Three-element Highlift Conngurations Numerical Study of Turbulence Model Predictions for the Md 30p/30n and Nhlp-2d Three-element Highlift Conngurations

Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientiic and Technical Information (STI) Program OOce plays a key part in helping NASA maintain this important role. The NASA STI Program OOce is operated by Langley Research Center, the lead center for NASA's scientiic and technical information. The NASA STI Program OOce provides access to the NASA STI Database, the largest collection of aeronautical and space science STI in the world. The Program OOce is also NASA's institutional mechanism for disseminating the results of its research and development activities. These results are published by NASA in the NASA STI Report Series, which includes the following report types: TECHNICAL PUBLICATION. Reports of completed research or a major signiicant phase of research that present the results of NASA programs and include extensive data or theoretical analysis. Includes compilations of signiicant scientiic and technical data and information deemed to be of continuing reference value. NASA counterpart and peer-reviewed formal professional papers, but having less stringent limitations on manuscript length and extent of graphic presentations. Scientiic and technical ndings that are preliminary or of specialized interest, e.g., quick release reports, working papers, and bibliographies that contain minimal annotation. Does not contain extensive analysis. CONTRACTOR REPORT. Scientiic and technical ndings by NASA-sponsored contractors and grantees. CONFERENCE PUBLICATION. Collected papers from scientiic and technical conferences, symposia, seminars, or other meetings sponsored or co-sponsored by NASA.language translations of foreign scientiic and technical material pertinent to NASA's mission. Specialized services that complement the STI Program OOce's diverse ooerings include creating custom thesauri, building customized databases, organizing and publishing research results.. . even providing videos. Abstract This report details calculations for the McDonnell-Douglas 30P/30N and the NHLP-2D three-element highlift conngurations. Calculations were performed with the Reynolds averaged Navier-Stokes code ISAAC to study the eeects of various numerical issues on high lift predictions. These issues include the eeect of numerical accuracy on the advection terms of the turbulence equations, Navier-Stokes versus the thin-layer Navier-Stokes approximation , an alternative formulation of the production term, and the performance of several turbulence models. The eeect of the transition location on the NHLP-2D ow solution was investigated. Two empirical transition models were used to estimate the transition location.