A Validation of Mathematical Models for Turbojet Test Cells
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Previously developed one-dimensional and two-dimensional computer models for predicting turbojet test cell performance were compared with data obtained from a subscale test cell for the purpose of model validation. Comparisons were made for a variety of configurations and flow rates. A modified one-dimensional model was found to reasonably predict the variation of augmentation ratio with engine flow rate, although predicted magnitudes were consistently too small. The model incorporated excessive drag losses and an inaccurate jet spreading parameter for large engine-augmentor spacings. The two- dimensional model accurately predicted experimental velocity profiles, but over- predicted pressure variations, except for low engine exit Mach numbers.
- Computer Programming and Software
- Jet and Gas Turbine Engines