A Validation of Mathematical Models for Turbojet Test Cells
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1978
- Accession Number
- ADA055991
Entities
People
- David W. Netzer
- John Justin Walters
Organizations
- Naval Postgraduate School