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HIFiRE-1 High Reynolds, High Angle Ground Test

Juliano, Thomas J. and Kimmel, Roger L. and Willems, Sebastian and Gülhan, Ali and Schneider, Steven P. (2014) HIFiRE-1 High Reynolds, High Angle Ground Test. 39th Dayton-Cincinnati Aerospace Sciences Symposium, 5. Mar. 2014, Dayton, United States of America.

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The HIFiRE-1 is a 7-degree half-angle circular cone with a 2.5-mm nose radius. A successful HIFiRE-1 flight experiment was carried out in March 2010. Due to an anomaly in the exoatmospheric pointing maneuver, the reentry angle of attack was higher than anticipated (5–15 degrees instead of near zero). A test campaign in the H2K hypersonic wind tunnel at DLR Cologne gathered high-frequency pressure fluctuation data and global heat flux via infrared (IR) thermography at the high angles of attack and Reynolds numbers encountered in the as-flown trajectory. This paper presents analysis of data collected at 0deg angle of attack at freestream Reynolds numbers from 5.7 to 10.7e6 /m for 1.6- and 2.5-mm-radius nosetips. The transition onset and end locations derived from IR thermography coincide well with the earliest and largest amplification of pressure fluctuations identified by the fast-response surface-mounted pressure transducers. Stability analysis of the astested conditions was done with the Stability and Transition of Boundary Layers (STABL) software suite. An N-factor of 5.5 correlates well with transition location for the 1.6-mmradius nosetip. For the blunter nosetip, N ≈ 5.2 at transition. The peak pressure fluctuation frequencies predicted by STABL agree within 8% of those measured.

Item URL in elib:https://elib.dlr.de/94760/
Document Type:Conference or Workshop Item (Speech)
Title:HIFiRE-1 High Reynolds, High Angle Ground Test
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Willems, Sebastiansebastian.willems (at) dlr.deUNSPECIFIED
Gülhan, Aliali.guelhan (at) dlr.deUNSPECIFIED
Schneider, Steven P.Purdue UniversityUNSPECIFIED
Date:March 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:transition, cone, angle of attack, HIFiRE 1
Event Title:39th Dayton-Cincinnati Aerospace Sciences Symposium
Event Location:Dayton, United States of America
Event Type:international Conference
Event Dates:5. Mar. 2014
Organizer:American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Deposited By: Willems, Sebastian
Deposited On:20 Jan 2015 09:12
Last Modified:20 Jan 2015 09:12

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