Pressure Gradient Effects on Supersonic Transition over Axisymmetric Bodies at Incidence

You are here: Homepage > Search

Pressure Gradient Effects on Supersonic Transition over Axisymmetric Bodies at Incidence

Tokugawa, Naoko

Boundary-layer transition on axisymmetric bodies at a nonzero angle of attack in Mach 2 supersonic flow was investigated using experimental measurements and linear stability analysis. Transition over four axisymmetric bodies (namely, the Sears-Haack body, the semi-Sears-Haack body, the straight cone, and the flared cone) with different axial pressure gradients was measured in two different facilities with different unit Reynolds numbers. The semi-Sears-Haack body and flared cone were designed specifically to achieve a broader range of axial pressure distributions. Measurements revealed a dramatic effect of body shape on transition behavior near the leeward plane of symmetry. For a body shape with an adverse pressure gradient (that is, a flared cone), the measured transition patterns show an earlier transition location along the leeward symmetry plane in comparison with the neighboring azimuthal locations. For a nearly zero pressure gradient (that is, the straight cone), such leeward-first transition is observed only at the larger unit Reynolds number. Finally, transition occurs farther downstream along the leeward plane for the remaining two body shapes with a favorable pressure gradient. The observed transition patterns are partially consistent with the numerical predictions based on linear stability analysis. Presented as Paper 2012-3259 at the 42nd AIAA Fluid Dynamics Conference and Exhibit, New Orleans, 25 May-28 June 2012

Access

Access via TIB

Check availability in my library

Order at Subito €

Export, share and cite

Document information

Title :

Pressure Gradient Effects on Supersonic Transition over Axisymmetric Bodies at Incidence

Contributors:

Tokugawa, Naoko (author) / Choudhari, Meelan / Ishikawa, Hiroaki / Ueda, Yoshine / Fujii, Keisuke / Atobe, Takashi / Li, Fei / Chang, Chau-Lyan / White, Jeffery

Published in:

AIAA journal ; 53 , 12

Publication date :

2015

ISSN :

0001-1452

DOI :

https://doi.org/10.2514/1.J054070

Type of media :

Article (Journal)

Type of material :

Language :