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Apollo-Shaped Capsule Boundary Layer Transition at High-Enthalpy in T5

Marineau, Eric C. and Laurence, Stuart J. and Hornung, Hans G. (2011) Apollo-Shaped Capsule Boundary Layer Transition at High-Enthalpy in T5. In: AIAA conference proceedings on disc, Vol. 15, No. 1 (ASM). 48th AIAA Aerospace Sciences Meeting , 04.-07. Januar 2010, Orlando, USA. ISBN 1600867391.

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Abstract

An investigation of the boundary layer transition on a 7-inch Apollo-shaped capsule heatshield at high enthalpy was performed in the T5 Hypervelocity Shock Tunnel at GAL-CIT. Three series of tests on 2 models for a total 57 shots were performed in air at angles-of-attack of 20-deg and 28-deg for stagnation enthalpies between 7 and 20 MJ/kg and stagnation pressures between 20 and 60 MPa. The free-stream Reynolds number based on model diameter was between 0.3 and 0.9 million. A trip insert with 25 0.05-inch square "pizza box" roughness elements located at 0.345-inch below the heat shield geometric cen- ter was used to promote transition on the leeside of the model. Trip heights of 0.007, 0.010 and 0.015 inch were used. Tests were performed with and without trips to evaluate the turbulent heating augmentation. For the highest Reynolds number condition, natural transition occurred on the leeside at both angle of attacks. The most aggressive trips appear to have generated a fully turbulent ows over the leeside of for the high enthalpy conditions at 17 MJ/kg.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Apollo-Shaped Capsule Boundary Layer Transition at High-Enthalpy in T5
Authors:
AuthorsInstitution or Email of Authors
Marineau, Eric C.California Institute of Technology, Pasadena, CA
Laurence, Stuart J.UNSPECIFIED
Hornung, Hans G.California Institute of Technology, Pasadena, CA
Date:2011
Journal or Publication Title:AIAA conference proceedings on disc
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. 15, No. 1 (ASM)
Series Name:2010 AIAA Meetng Papers on Disc
ISBN:1600867391
Status:Published
Keywords:boundary layer, high enthalpy,
Event Title:48th AIAA Aerospace Sciences Meeting
Event Location:Orlando, USA
Event Type:international Conference
Event Dates:04.-07. Januar 2010
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Grundlagen Raumtransport - Anlagen und Messtechnik (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Dagmar Brennecke-Hosseinzadeh
Deposited On:13 Jan 2011 14:49
Last Modified:13 Jan 2011 14:49

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