Title page for ETD etd-02132009-171914


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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