Development and application of a multistage Navier-Stokes solver. Part 1: Multistage modeling using bodyforces and deterministic stresses

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Journal of Turbomachinery

DOI:https://doi.org/10.1115/1.2841395· OSTI ID:290029

Rhie, C M; Gleixner, A J; Spear, D A; Fischberg, C J; Zacharias, R M ^[1]

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1. Pratt and Whitney, East Hartford, CT (United States)

A multistage compressor performance analysis method based on the three-dimensional Reynolds-averaged Navier-Stokes equations is presented in this paper. This method is an average passage approach where deterministic stresses are used to ensure continuous physical properties across interface planes. The average unsteady effects due to neighboring blades and/or vanes are approximated using deterministic stresses along with the application of bodyforces. Bodyforces are used to account for the potential interaction between closely coupled (staged) rows. Deterministic stresses account for the average wake blockage and mixing effects both axially and radially. The attempt here is to implement an approximate technique for incorporating periodic unsteady flow physics that provides for a robust multistage design procedure incorporating reasonable computational efficiency. The present paper gives the theoretical development of the stress/bodyforce models incorporated in the code, and demonstrates the usefulness of these models in practical compressor applications. Compressor performance prediction capability is then established through a rigorous code/model validation effort using the power of networked workstations. The numerical results are compared with experimental data in terms of one-dimensional performance parameters such as total pressure ratio and circumferentially averaged radial profiles deemed critical to compressor design. This methodology allows the designer to design from hub to tip with a high level of confidence in the procedure.

• OSTI ID: 290029
• Journal Information: Journal of Turbomachinery, Journal Name: Journal of Turbomachinery Journal Issue: 2 Vol. 120; ISSN JOTUEI; ISSN 0889-504X
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
GAS COMPRESSORS
GAS TURBINE ENGINES
MATHEMATICAL MODELS
PERFORMANCE