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On flowfield periodicity in the nasa transonic flutter cascade. part 2; numerical study
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wood, Jerry R. Chima, Rodrick V. Lepicovsky, Jan McFarland, Eric R. |
| Copyright Year | 2000 |
| Description | The transonic flutter cascade facility at NASA Glenn Research Center was redesigned based on a combined program of experimental measurements and numerical analyses. The objectives of the redesign were to improve the periodicity of the cascade in steady operation, and to better quantify the inlet and exit flow conditions needed for CFD predictions. Part I of this paper describes the experimental measurements, which included static pressure measurements on the blade and endwalls made using both static taps and pressure sensitive paints, cobra probe measurements of the endwall boundary layers and blade wakes, and shadowgraphs of the wave structure. Part II of this paper describes three CFD codes used to analyze the facility, including a multibody panel code, a quasi-three-dimensional viscous code, and a fully three-dimensional viscous code. The measurements and analyses both showed that the operation of the cascade was heavily dependent on the configuration of the sidewalls. Four configurations of the sidewalls were studied and the results are described. For the final configuration, the quasi-three-dimensional viscous code was used to predict the location of mid-passage streamlines for a perfectly periodic cascade. By arranging the tunnel sidewalls to approximate these streamlines, sidewall interference was minimized and excellent periodicity was obtained. |
| File Size | 967076 |
| File Format | |
| Language | English |
| Publisher Date | 2000-03-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Static Pressure Transonic Flow Computational Fluid Dynamics Turbomachinery Inlet Flow Periodic Variations Transonic Flutter Computer Programs Panel Method Fluid Dynamics Flow Distribution Shadowgraph Photography Pressure Measurement Three Dimensional Models Outlet Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
