BYU

Abstract by Brent Reichman

Personal Infomation


Presenter's Name

Brent Reichman

Co-Presenters

None

Degree Level

Doctorate

Co-Authors

None

Abstract Infomation


Department

Physics and Astronomy

Faculty Advisor

Kent Gee, Traci Neilsen

Title

Comparison of jet noise between flyover and ground run-up measurements

Abstract

While the majority of jet noise analysis takes place in static conditions, airbase and community
military jet noise exposure happens for the most part when the aircraft is in flight. Comparisons
between flyover and ground run-up operations for high-performance military aircraft have not
been previously published. This presentation presents comparisons between ground run-up
and flyover for an F-35 operating at 150% Engine Thrust Request. The overall sound pressure
level, spectra, and nonlinearity indicators are shown for the two scenarios. The overall sound
pressure level is reduced in the peak radiation direction in the aft of the aircraft but increased
in the forward direction. Doppler shifts in frequency are not observed due to forward flight. The
increase in level in the forward direction results in shock formation that is absent during ground
run-up operations.