21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-3.4.5

CONSIDERATIONS IN APPLYING MILITARY AIRCRAFT FOREBODY FLOW CONTROL METHODOLOGY TO COMMERCIAL AIRCRAFT

Beyers M. E., Ericsson L. E.*
Institute for Aerospace Research, Canada; *USA

Keywords: military aircraft, forebody flow, control, commercial aircraft

The implications of applying fore body flow control technology to a high-speed civil transport (HSCT) configuration are analyzed. Unlike the case of combat aircraft, where the effective range for forebody flow control is in the post-stall regime, for the HSCT the control is required at the moderate angles of attack of take-off and landing, where additional flow parameters become important. The main complication in transferring the technology to civil aircraft is the large difference in forebody slenderness, with apex half-angles below 10 deg compared to above 25 deg for military aircraft. Available experimental results for aircraft are interpreted using the existing data base for bodies of revolution. Lateral directional control requirements for an HSCT in the low speed flight phase are considered.

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