Modelling techniques for jet impingementA technique for testing scale models for the determination of fluctuating pressure loads due to jet impingement has been investigated using a quarter-scale model of a boilerplate test facility in which a JT-15D engine with a rectangular outer nozzle blows over a small curved airfoil representing the upper-surface of a wing. When model and full-scale spectra of fluctuating surface pressures are reduced to plots of pressure coefficient power-spectral density vs Strouhal number, moderate agreement is obtained, but a shift of spectral peaks is noted. However, when a correction for the ratio of average jet to ambient temperature is applied, the spectral peaks agree.
Document ID
19770052096
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Haviland, J. K. (Virginia Univ. Charlottesville, VA, United States)
Herling, W. W. (Virginia, University Charlottesville, Va., United States)