Calibration of the PARC Program for Propulsion-Type Flows

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Abstract : The purpose of this Technical Report is to provide documentation of recent efforts towards the calibration of the PARC program for various types of flows experienced in the testing of turbine engines and rocket motors. This report provides a systematic and comprehensive assessment of the PARC program's capabilities and provides a baseline capability against which future modifications to the PARC program can be assessed. The work documented herein is based on a building block calibration approach and is a continuation of efforts started in FY 87. The present work revisits some of the earlier cases and expands into other, more complex flow problems with features similar to those found in the ETF test environments. The discussion of each calibration case is broken down into three parts. The motivation for selecting a particular flow problem for the PARC calibration is discussed first. That section will identify how each calibration case is related to typical testing problems within ETF and why it is important that it be included in this report. The actual test cases used for each calibration case are discussed. Particular emphasis is placed on where the data were obtained. The CFD results obtained in the study are documented and discussed in the third section, along with a description of grids, boundary conditions, and initial conditions used in the study. Keywords: Navier-Stokes code, Free jet, Diffuser performance, 2-D/C-D Nozzle, Backstep.