Accession Number:

AD1006124

Title:

A Novel Method to Predict Circulation Control Noise

Descriptive Note:

Technical Report,01 Apr 2012,31 Dec 2015

Corporate Author:

Florida State University Tallahassee United States

Report Date:

2016-03-17

Pagination or Media Count:

238.0

Abstract:

Underwater vehicles suffer from reduced maneuverability with conventional lifting appendages. Circulation control CC offers a method to increase maneuverability. However, with CC comes additional noise sources. A method involving estimation of the velocity, surface pressure, and far-field acoustic fields is developed. In the absence of added noise, the prediction performs well on simulated , low Reynolds number flow over a cylinder. The method also performs reasonably well on a high Reynolds number circulation control airfoil with no blowing but under-performs with the jet active. Delay-and-sum and DAMAS beam forming are used to acquire accurate far-field acoustic levels. A scaling analysis is also performed.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE