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Computational Analysis of Forebody Tangential Slot Blowing on the F/A-18An overview of the computational effort to analyze forebody tangential slot blowing for use on the F/A-18 aircraft is presented. Tangential slot blowing generates side force and yawing moment which may be used to control the aircraft flying at high angle of attack. Computations using the isolated forebody are obtained at full-scale wind tunnel test conditions for direct comparison with available experimental data. The effects of jet exit conditions, jet length, and jet location are also studied using the isolated forebody. In addition, these computations are used to predict the effect of slot blowing at transonic maneuvering flight conditions. The effects of over- and under-blowing on force and moment production are analyzed. Non-time-accurate solutions are obtained to determine the steady-state side force and yawing moments generated by tangential slot blowing. Time-accurate solutions are obtained to study the force onset time lag of tangential slot blowing. The effect of blowing on the burst point location are then analyzed by obtaining computations using the aircraft geometry, which includes the wing, empennage, and faired-over inlets. The effect of blowing on the buffet loads on the vertical tails are analyzed using time-accurate computations. Comparison with available experimental data from full-scale wind tunnel and sub-scale wind tunnel tests are made. This computational analysis compliments the experimental results and provides a detailed understanding of the effects of tangential slot blowing on the flow field about the F/A-18.
Document ID
20010041561
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Gee, Ken
(MCAT Inst. Moffett Field, CA United States)
Rizk, Yehia M.
(NASA Ames Research Center Moffett Field, CA United States)
Schiff, Lewis B.
(NASA Ames Research Center Moffett Field, CA United States)
Kutler, Paul
Date Acquired
August 20, 2013
Publication Date
January 1, 1994
Subject Category
Computer Programming And Software
Meeting Information
Meeting: NASA High Alpha Conference/Workshop
Location: Edwards, CA
Country: United States
Start Date: July 12, 1994
End Date: July 14, 1994
Funding Number(s)
PROJECT: RTOP 505-68-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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