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TRASONIC WALL INTERFERENCE ASSESMENT AND CORRECTION

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
580
Program Year/Program:
1984 / SBIR
Agency Tracking Number:
580
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Flow Research Inc
21414 - 68th Avenue South Kent, WA 98032
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Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1984
Title: TRASONIC WALL INTERFERENCE ASSESMENT AND CORRECTION
Agency: NASA
Contract: N/A
Award Amount: $261,088.00
 

Abstract:

IN ORDER TO ESTIMATE THE PERFORMANCE OF MODELS TESTED IN TRASONIC WIND TUNNELS, AND TO ACHIEVE MAXIUM BENEFIT FROM SUCH TEST, IT IS NECESSARY TO MAKE ACCURATE CORRECTIONS FOR EFFECTS OF WALL INTERFERENCE. AND IMPROVED CONCEPT FOR THE ASSESMENT AND CORRECTION OF WALL INTERFERENCE IN TRASONIC TUNNELS IS THE FOCUS OF THIS PROJECT. UNTIL RECENTLY, THE ONLY AVAILABLE ANALYSIS OF INTERFERENCE WAS A CLASSICAL LINEAR THEORY WHICH DOES NOT PRODUCE SUFFICIENTLY ACCURATE FORMULAE FOR PRACTICAL USE IN THE TRASONIC REGIME. WORK ON WALL INTERFERENCE CORRECTION PROCEDURES FOR TRASONIC TESTS IS IN THE RESEARCH STAGE: A RECENTLY COMPLETED TRASONIC, THREE-DIMENSIONAL PROCEDURE INVOLVES SMALL DISTURBANCE APPROXIMATIONS AND IRROTATIONAL FLOW ASSUMPTIONS THAT MAKE THIS METHOD GENERALLY INADEQUATE FOR PREDICTING WALL INTERFERENCE EFFECTS FOR REAL TEST MODELS. IT IS, THEREFORE, THE OBJECTIVE OF THIS WORK TO DEVELOP AN ACCURATE CORRECTION WHICH DOES NOT NEGLECT ROTATIONAL EFFECTS AND MAKES NO SMALL DISTURBANCE ASSUMPTIONS. IN PHASE I, A PROCEDURE APPLICABLE TO THREE- DIMENSIONAL CONFIGURATIONS IS DEVELOPED. THE PROCEDURE IS TESTED USING A COMPUTER CODE DEVELOPED IN PILOT FORM AND IS LIMITED TO TWO-DIMENSIONAL CONFIGURATIONS. THE IDEAS FORMULATED AND TESTED IN PHASE I ARE THE BASIS FOR A PHASE II EFFORT FOR DEVELOPING A USER-ORIENTED COMPUTER CODE TO CALCULATE WALL INTERFERENCE CORRECTIONS FOR AIRCRAFT CONFIGURATIONS.

Principal Investigator:

Magdi H. Rizk

Business Contact:

Small Business Information at Submission:

Flow Industries Inc.
21414 68th Ave. South Kent, WA 98032

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No