Mechanical Actuators for Guidance of a Supersonic ... - CFD4Aircraft

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What went wrong?• Compromises in machining small rounds led to significant differences between CFDgeometry and test rounds• New grid generated and new runs accounting forFin leading edge bluntnessFillet at base of finRound pin versus RectangularAuthorized for public release. Distribution Unlimited.06/21/2007 24
Comparison with Updated Geometry• Once a more accurate geometry was modeled, a much better correlation was foundbetween the computed and measured drag and roll torques• Allowed us to proceed with divert test on full scale rounds00.4-0.010.35Roll Torque (N-m)-0.02-0.03-0.04Long Pin (Range-Prodas)Long Pin (CFD)Short Pin (Range-Prodas)Short Pin (CFD)Drag Coefficient (C d)0.30.25Long Pin Cd (Range-Prodas)Long Pin Cd (CFD)Short Pin Cd (Range-Prodas)Short Pin Cd (CFD)-0.051.8 2 2.2 2.4 2.6 2.8 3Mach Number0.21.8 2 2.2 2.4 2.6 2.8 3Mach NumberAuthorized for public release. Distribution Unlimited.06/21/2007 25
Page 4 and 5: Guided bullets to intercept mortars
Page 6 and 7: Concept of implementing flow contro
Page 10 and 11: Parametric Study DetailsPin locatio
Page 12 and 13: Effect of Separation Distance (betw
Page 14 and 15: Mach 2.5 Experiments at GTRI½ Proj
Page 16 and 17: Second Generation Actuator Rotates
Page 18 and 19: Using CFD to Predict Range Test Res
Page 20 and 21: ARL Range Test Setup• 6 Orthogona
Page 22 and 23: Shadowgraphs from Range - Count Rot
Page 26 and 27: 700 ft Range Preliminary Tests• O
Page 28 and 29: 700 ft Range Tests - Divert Demonst
Page 30 and 31: Divert Demonstrated by Shadowgraphs
Page 32: Conclusions• A demonstration of s

Mechanical Actuators for Guidance of a Supersonic ... - CFD4Aircraft

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