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Study of the aerodynamic characteristics of cone-sphere models in a hypersonic flow
Authors:N. N. Pilyugin  V. S. Khlebnikov
Affiliation:(1) Graduate Aeronautical Laboratories, Division of Engineering and Applied Science, California Institute of Technology, 1200 E. California Blvd. MC 301–46, 91125-4600 Pasadena, CA, USA;(2) Centre Acoustique, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully, France;(3) Mechanical Engineering, Michigan State University, A118 Engineering Research Complex, 48824-1326 East Lansing, MI, USA;(4) Department of Mechanical Engineering, Delft University of Technology, Leeghwaterstraat 21, 2628 CA Delft, The Netherlands;(5) Aerospace Engineering Department, Delft University of Technology, Kluyverweg 1, 2627 HS Delft, The Netherlands;(6) Fachgebiet Str?mungslehre und Aerodynamik, Technische Universit?t Darmstadt, Petersenstra?e 30, 64287 Darmstadt, Germany;(7) Advanced Sensing and Optical Measurements Branch, NASA Langley Research Center, Mail Stop 493, 23681 Hampton, VA, USA;(8) Advanced Sensing and Optical Measurements Branch, NASA Langley Research Center, Mail Stop 493, 23681 Hampton, VA, USA;(9) ATK Space Systems, Inc., NASA Langley Research Center, Mail Stop 493, 23681 Hampton, VA, USA;(10) Institute of Propulsion Technology Engine Measurement Systems, German Aerospace Center (DLR), Linder H?he, 51147 K?ln, Germany;(11) Department of Mechanical Engineering, Michigan State University, A131, Engineering Research Complex, 48824 East Lansing, MI, USA;(12) Department of Mechanical Engineering, The City College of the City University of New York, 10031 New York, NY, USA;(13) Department of Aerospace Engineering, The University of Michigan, 3056 FXB 2140, 48109-2140 Ann Arbor, MI, USA;(14) Northrop Grumman Space Technology, One Space Park, 90278 Redondo Beach, CA, USA;(15) Department of Mechanical Engineering, University of Maryland, 20742 College Park, MD, USA;(16) Department of Mechanical Engineering, University of Montenegro, Cetinjski put bb, 8100 Podgorica, Montenegro;(17) Department of Aerospace and Mechanical Engineering, University of Notre Dame, 109 Hessert Laboratory, 46556 Notre Dame, IN, USA;(18) Department of Mechanical Engineering, University of Utah, 8411 Salt Lake City, UT, USA;(19) Instituto Universitario de Microgravedad, Aeron?uticos, Universidad Polit?cnica de Madrid, Plaza del Cardenal Cisneros 3, 28040 Madrid, Spain
Abstract:The aerodynamic characteristics of cone-sphere models are studied at Mach numbers M = 6, 8.4, and 12 to 13 over a wide Reynolds number range. Models of a braking device (sphere) were connected with a load (frustum of a cone) by means of shrouds. The dependences of the aerodynamic coefficients C x and C y on the angle of attack α were obtained for different relative dimensions of the load and the braking device, shroud lengths, and Mach and Reynolds numbers. The effect of the above-mentioned parameters on the aerodynamic characteristics of the models is analyzed. The C x (ReD) dependences of load-parachutemodels in a symmetric flow are determined over the wide Mach and Reynolds number ranges 6 ≤ M ≤ 13 and 3 · 103 ≤ ReD ≤ 3 · 106.
Keywords:hypersonic flow  load-braking device  Mach and Reynolds numbers  aerodynamic characteristics  flow restructuring  angle of attack
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