Type of Document	Dissertation
Author	Lindau, Jules Washington
URN	etd-02132009-171914
Title	Multidimensional dynamic compression system modeling
Degree	PhD
Department	Mechanical Engineering
Advisory Committee	Advisor Name Title O'Brien, Walter F. Committee Chair Davis, Milton W. Jr. Committee Member Moore, John Committee Member Ng, Wing F. Committee Member Walters, Robert W. Committee Member
Keywords	two-dimensional post-stall model
Date of Defense	1995-06-05
Availability	restricted
Abstract 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 methods.
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