ORCID Number

0009-0004-2615-9500

Date of Award

Fall 2025

Access Type

Thesis - Open Access

Degree Name

Master of Science in Aerospace Engineering

Department

Aerospace Engineering

Committee Chair

R.R. Mankbadi

Committee Chair Email

mankbadr@erau.edu

First Committee Member

Vladimir V. Golubev

First Committee Member Email

golubd1b@erau.edu

Second Committee Member

William Engblom

Second Committee Member Email

engbl7de@erau.edu

Third Committee Member

Sam Salehian

Third Committee Member Email

salehian@cadence.com

Fourth Committee Member

Guillermo A. Jaramillo

Fourth Committee Member Email

guillermo.jaramillo@correounivalle.edu.co

College Dean

James W. Gregory

Abstract

This work investigates passive jet-noise mitigation using externally positioned air–water curtains that attenuate radiated sound without altering the underlying jet dynamics. Two classes of multiphase media are examined: a gaseous carrier phase containing dispersed liquid droplets, and a liquid carrier phase containing entrained air bubbles. For both systems, suspended and dispersed regimes are represented through a generalized perturbation formulation derived from the volume-averaged multiphase equations, incorporating finite volume fractions, interphase momentum coupling, and slip between phases. Analytical and numerical solutions demonstrate that acoustic attenuation is primarily governed by dispersed-phase diameter, volume fraction, and excitation frequency, with additional sensitivity to phase-interaction mechanisms. Comparison with available experimental measurements and CFD results confirms the accuracy of the predicted absorption trends. The findings establish that multiphase curtains can provide an effective passive pathway for broadband jet-noise reduction and offer a physics-based foundation for optimizing curtain composition, geometry, and operating conditions in future aeroacoustic applications.

Download

Share

COinS