Title page for ETD etd-02132009-171914
|Type of Document
||Lindau, Jules Washington
||Multidimensional dynamic compression system modeling
|O'Brien, Walter F.
|Davis, Milton W. Jr.
|Ng, Wing F.
|Walters, Robert W.
- two-dimensional post-stall model
|Date of Defense
A more robust method for solving the governing equations of a one-dimensional stage-by-stage dynamic compression system model was developed and validated. The improved
method was then applied to two-dimensional post-stall models. The improvement in robustness
was achieved by modeling the governing equations with upwind differencing and use of implicit
time integration. A special form of upwind flux, flux difference splitting with source term
treatment, FDSS, was developed for the model. A two-dimensional axisymmetric model was
developed to allow post-stall modeling of split flowpath systems such as turbofans. This model
was an entirely new concept. Additionally, a two-dimensional axial-circumferential model of
rotating stall cell development and propagation was developed based on previous work. All of
the models developed applied upwind differencing techniques to improve upon central-difference
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