Supersonic near-wake afterbody boattailing effects on axisymmetric bodies

1994 ◽  
Vol 31 (6) ◽  
pp. 1021-1028 ◽  
Author(s):  
J. L. Herrin ◽  
J. C. Dutton
Keyword(s):  
Near Wake ◽  
Axisymmetric Bodies

Effect of Base Slant on Flow in the Near Wake of an Axisymmetric Cylinder

1980 ◽  
Vol 31 (2) ◽  
pp. 132-147 ◽  
Author(s):  
Thomas Morel
Keyword(s):  
Drag Coefficient ◽  
Three Dimensional ◽  
Local Maximum ◽  
The Body ◽  
Wake Flow ◽  
Force Measurements ◽  
Near Wake ◽  
Slant Angle ◽  
Cylinder Length ◽  
Axisymmetric Bodies

SummaryThe effects of slanting the base of a slender axisymmetric cylinder (length/diameter ratio of 9), aligned with the flow, was studied experimentally. The body was equipped with interchangeable rear ends covering a range of slant angles between 0° (vertical) and 70°. It was found that the base slant has a very dramatic effect on body drag, particularly in a relatively narrow range of slant angles where the drag coefficient exhibits a large local maximum (over-shoot). Detailed study of the flow showed that the drag overshoot is related to the existence of two very different Separation patterns on the slanted base. One pattern is similar to that found behind axisymmetric bodies with no base slant, and its main feature is the presence of a closed Separation region adjacent to the base. The other pattern is highly three-dimensional with two streamwise vortices forming along the sides of the slanted base. This pattern sets in very abruptly at a “critical” slant angle α ∼ 47°. Drag force measurements showed that, at first, the drag coefficient slowly increases with the slant angle, but then jumps suddenly upwards to more than double its baseline value (from CD = 0.24 to CD = 0.625) at the critical angle. At angles higher than that CD decreases again, and at 70° it is about equal to the baseline value. Further effects of the slant angle are the generation of a large side force and a significant increase in near-wake flow periodicity.

MANIPULATION OF THE STARTING SEMICIRCULAR-CYLINDER NEAR-WAKE BY MEANS OF A SPLITTER PLATE

1997 ◽  
Vol 4 (3) ◽  
pp. 211-221 ◽  
Author(s):  
Alain Texier ◽  
Madeleine Coutanceau ◽  
Nathalie Boisaubert
Keyword(s):  
Splitter Plate ◽  
Near Wake

Nonequilibrium effects in near-wake ionizing flows

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 1151-1163
Author(s):  
F. Grasso ◽  
S. Pirozzoli
Keyword(s):  
Near Wake ◽  
Nonequilibrium Effects

SHEDDING VORTEX IN THE NEAR WAKE OF A CYLINDER ARE ANALYZED FROM THE NUMBER OF STROUHAL CHANGING THE METHODS OF NUMERICAL DISCRETIZATION

2019 ◽  
Author(s):  
Elcilane Araújo de Freitas ◽  
Letícia Castelo Branco ◽  
Erick Oliveira do Nascimento ◽  
André Araujo ◽  
Erb Lins
Keyword(s):  
Near Wake ◽  
Numerical Discretization

SOOT DISTRIBUTION IN TURBULENT BLUFF BODY NEAR WAKE NON PREMIXED FLAMES

2018 ◽  
Author(s):  
Suzane Nascimento ◽  
Juan Jose Cruz Villanueva ◽  
Luís Fernando Figueira da Silva
Keyword(s):  
Bluff Body ◽  
Premixed Flames ◽  
Near Wake ◽  
Soot Distribution
Sign in / Sign up

Export Citation Format

Share Document