Surface Measurements – Flow Field Correlations Resulting in Applicable Cavity Flow Field Control

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-07-C-3710
Agency Tracking Number: F061-243-1432
Amount: $746,505.00
Phase: Phase II
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: AF06-243
Solicitation Number: 2006.1
Small Business Information
6210 Keller's Church Road, Pipersville, PA, 18947
DUNS: 929950012
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Srinivasan Arunajatesan
 Senior Research Scientist
 (215) 766-1520
 ajs@craft-tech.com
Business Contact
 Neeraj Sinha
Title: Vice President & Technica
Phone: (215) 766-1520
Email: sinha@craft-tech.com
Research Institution
N/A
Abstract
A surface pressure measurement based closed loop adaptive flow control strategy for the minimization of dynamic loads caused by high subsonic/supersonic flow over a cavity is proposed. In the Phase I part of this program we have focused on the examining the feasibility of this approach and establishing some of the basic techniques to be used in the control algorithm. The validity of using a limited number of wall pressure measurements as an indicator of the entire cavity flow field dynamics is established, its temporal analog is shown to be equivalent to an ARMA system identification model and its use in a predictive manner to estimate future states of the system is demonstrated. This, along with a Disturbance Rejection based controller and a plant model in the form of a validated CFD solver is used to create a numerical test bed. This presents a low risk approach to the Phase II where we will focus the issues of controller design, actuator characterization, design and refinement, and, demonstration of flow control on a cavity flow field at a suitable scale.

* Information listed above is at the time of submission. *

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