Accession Number : ADA256831


Title :   Prediction of Turbine Cascade Flows with a Quasi-Three-Dimensional Rotor Viscous Code and the Extension of the Algebraic Turbulence Model


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Wang, Chun-Wei


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256831.pdf


Report Date : Jun 1992


Pagination or Media Count : 69


Abstract : A quasi-three-dimensional rotor viscous code is used to predict high subsonic flow through an annular cascade of turbine blades. The well known Baldwin-Lomax turbulence model in used in the program. An attempt was made to implement a new turbulence model, based on renorminalization group theory in the program. This was done to improve the prediction of the boundary layer transition on the blade surfaces and subsequent wake development. The comparison of these two turbulence models with experimental data are presented. Pressure, velocity ratio, flow angle distributions and downstream wake predictions were studied using results from RVCQ3D(Rotor Viscous Code Quasi-Three-Dimensional) code. The computed results showed good agreement with experiment when comparing the blade surface local static pressure to inlet total pressure ratio at the midspan position of the annular turbine cascade. The computational approach used to implement the turbulence model is also described.


Descriptors :   *TURBINE BLADES , *MATHEMATICAL PREDICTION , *SUBSONIC FLOW , *CASCADES(FLUID DYNAMICS) , VELOCITY , ANGLES , RATIOS , EXPERIMENTAL DATA , COMPUTATIONS , MODELS , DISTRIBUTION , LAYERS , COMPARISON , THEORY , THESES , BOUNDARY LAYER , TURBULENCE , BLADES , SURFACES , BOUNDARIES , THREE DIMENSIONAL , APPROACH , ANNULAR FLOW , TURBOMACHINERY , RUNGE KUTTA METHOD , STATIC PRESSURE , INLETS , VISCOUS FLOW , STATICS , NAVIER STOKES EQUATIONS , ROTORS , BOUNDARY LAYER TRANSITION , AGREEMENTS , PRESSURE , WAKE , TURBINES , TRANSITIONS , FLOW


Subject Categories : Computer Programming and Software
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE