Author : National Aeronautics and Space Administration (NASA)
Release : 2018-07-17
Genre :
Kind : eBook
Book Rating : 209/5 ( reviews)
Book Synopsis Aerodynamic Control of Nasp-Type Vehicles Through Vortex Manipulation. Volume 2 by : National Aeronautics and Space Administration (NASA)
Download or read book Aerodynamic Control of Nasp-Type Vehicles Through Vortex Manipulation. Volume 2 written by National Aeronautics and Space Administration (NASA). This book was released on 2018-07-17. Available in PDF, EPUB and Kindle. Book excerpt: Forebody Vortex Control (FVC) was explored in this research program for potential application to a NASP-type configuration. Wind tunnel tests were conducted to evaluate a number of jet blowing schemes. The configuration tested has a slender forebody and a 78 deg swept delta wing. Blowing jets were implemented on the leeward side of the forebody with small circular tubes tangential to the surface that could be directed aft, forward, or at angles in between. The effects of blowing are observed primarily in the yawing and rolling moments and are highly dependent on the jet configuration and the angle of attack. Results show that the baseline flow field, without blowing activated, is quite sensitive to the geometry differences of the various protruding jets, as well as being sensitive to the blowing, particularly in the angle of attack range where the forebody vortices are naturally asymmetric. The time lag of the flow field response to the initiation of blowing was also measured. The time response was very short, on the order of the time required for the flow disturbance to travel the distance from the nozzle to the specific airframe location of interest at the free stream velocity. Overall, results indicate that sizable yawing and rolling moments can be induced with modest blowing levels. However, direct application of this technique on a very slender forebody would require thorough wind tunnel testing to optimize the jet location and configuration. Suarez, Carlos J. and Kramer, Brian R. and Smith, Brooke C. and Malcolm, Gerald N. Unspecified Center AERODYNAMIC CONFIGURATIONS; BLOWING; CONTROL SURFACES; FLOW DISTRIBUTION; STATIC TESTS; VORTICES; WIND TUNNEL TESTS; AIRCRAFT CONTROL; DELTA WINGS; FOREBODIES; SWEPT WINGS...
