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Flow Field And Loading Analysis On A Wrap-Around Fin Missile, Thomas C. Mcintyre
Flow Field And Loading Analysis On A Wrap-Around Fin Missile, Thomas C. Mcintyre
Theses and Dissertations
Wrap-around fin (WAF) missiles offer packaging benefits but experience rolling moments due to the curved fin design. Rolling moments stabilize unguided projectiles, but cause guidance and control problems for future guided applications. Understanding the flow field in the vicinity of the fins is critical to future missiles. Fin pressure profiles were characterized with pressure-sensitive paint. Two rectangular four-fin constructions were tested-one solid and one with a rectangular hole (slotted fin). Static pressure data were divided by free-stream total pressure for presentation. Tests were conducted at Mach numbers of 2.15, 2.28, 2.41, 2.86, 3.25, 3.50 and 3.83. Reynolds numbers based on …
Velocity Profiles And Skin Friction On A Ribletted Flat Plate In Adverse Pressure Gradient., Richard D. Branam
Velocity Profiles And Skin Friction On A Ribletted Flat Plate In Adverse Pressure Gradient., Richard D. Branam
Theses and Dissertations
This project investigated the flow field characteristics over a flat, ribletted plate and the effects of an adverse pressure gradient on this flow field. Testing examined the development of the flow over the ribletted plate from laminar through fully turbulent flow fields. The flow field states (laminar, transitional, and turbulent) were determined using local turbulence intensity values and boundary layer profiles. Several parameters were examined to help better describe the flow characteristics, boundary layer profiles, and influence on skin friction drag. The skin friction drag coefficients were calculated using a numerical integration technique to determine an average value and scaled …