DOAJ Open Access 2025

Sound power level spectra of an installed General Electric F404 engine

Hunter J. Pratt Logan T. Mathews Tyce W. Olaveson Kent L. Gee

Lihat Sumber DOI

Abstrak

A sound power spectrum analysis has been conducted on a T-7A-installed F404 engine, for operating conditions spanning intermediate thrust to afterburner. From free-field pressure spectra at microphone arc arrays with radii of 38 and 76 m, sound power level spectra are calculated from surface integrals and assumed axisymmetric radiation. The spectral peak-frequency region, from ∼100–500 Hz, broadens with increasing engine conditions. When the power level spectra are plotted with Strouhal number, the spectral peak decreases with engine condition. Comparing this decrease with rocket data suggests that military jet noise radiation is becoming more rocket-like, especially at afterburner conditions.

Topik & Kata Kunci

Acoustics. Sound

Penulis (4)

Hunter J. Pratt

Logan T. Mathews

Tyce W. Olaveson

Kent L. Gee

Format Sitasi

APA MLA BibTeX

Pratt, H.J., Mathews, L.T., Olaveson, T.W., Gee, K.L. (2025). Sound power level spectra of an installed General Electric F404 engine. https://doi.org/10.1121/10.0036464

Akses Cepat

Lihat di Sumber doi.org/10.1121/10.0036464

Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.1121/10.0036464
Akses: Open Access ✓