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Heat Balance of a Transpiration-Cooled Heat Shield

Böhrk, Hannah and Piol , Olivier and Kuhn, Markus (2010) Heat Balance of a Transpiration-Cooled Heat Shield. Journal of Thermophysics and Heat Transfer, 24 (3), pp. 581-588. American Institute of Aeronautics and Astronautics (AIAA). doi: DOI: 10.2514/1.47172. ISSN 0887-8722.

Full text not available from this repository.

Official URL: http://www.aiaa.org/content.cfm?pageid=318&pubid=26&volume=24&issue=3&rss=1


HEATS is a layout tool for the determination of transient wall heat flux to a transpiration-cooled parallel flat plate under laminar or turbulent flow conditions. The method is based on heat balances between wall material, transpired coolant, and surrounding hot gas. It is introduced here with particular focus on a reentry mission. The investigation of transpiration cooling necessitates considering the entire flight trajectory. Because of long calculation times, computational fluid dynamics tools cannot be used. The calculation of wall temperatures of an entire trajectory with HEATS takes less than five minutes, which offers the possibility of sensitivity analyses, e.g., of coolant mass flow rate. The results presented within this paper are compared with cooling experiments under laminar flow and a computational fluid dynamics solution of one trajectory point for the second Sharp-Edge Flight Experiment trajectory for turbulent flow. The values compare well with deviations of the wall temperature below 10% and deviations of heat flux below 18%. The investigation of coolant mass flow rates by means of HEATS show that for the entire second Sharp-Edge Flight Experiment trajectory the transpiration-cooling experiment should be run with 0,1 g/s < m < 1 g/s.

Item URL in elib:https://elib.dlr.de/67747/
Document Type:Article
Title:Heat Balance of a Transpiration-Cooled Heat Shield
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:July 2010
Journal or Publication Title:Journal of Thermophysics and Heat Transfer
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI:DOI: 10.2514/1.47172
Page Range:pp. 581-588
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:active cooling, transpiration cooling, effusion cooling, heat shield, heat balance, energiebilanz
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 - Innovativer Thermalschutz (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Space Structural Components
Deposited By: Böhrk, Hannah
Deposited On:03 Jan 2011 17:51
Last Modified:08 Mar 2018 18:46

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