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HIFiRE-1 Surface Pressure Fluctuations from 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 Surface Pressure Fluctuations from High Reynolds, High Angle Ground Test. 52nd Aerospace Sciences Meeting, 13.-17. Jan. 2014, Washington D.C., United States of America. DOI: 10.2514/6.2014-0429

Full text not available from this repository.

Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2014-0429

Abstract

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 �0). A test campaign in the H2K hypersonic wind tunnel at DLR Cologne was mounted to gather high-frequency pressure fluctuation data and global heat flux via infrared thermography at the high angles of attack and Reynolds numbers encountered in the as-flown trajectory. This paper describes the analysis and interpretation of the surface pressure fluctuations; thermographic analysis is contained in a companion paper. Pressure-fluctuation power spectra were computed at azimuths from the windward to leeward rays in 45° increments at ten sensor locations along the ray, and the expected laminar, transitional, and turbulent regimes were encountered. The disturbances along the windward and leeward rays are presumed to arise from amplified second-mode waves. At 6° angle of attack, 250-kHz disturbances were detected along the 135°-from-windward ray; it is unclear whether these fluctuations arise from second-mode or crossflow instabilities. At 9° angle of attack, similar pressure fluctuations occur along the 135° ray prior to separation near the leeward ray.

Item URL in elib:https://elib.dlr.de/94759/
Document Type:Conference or Workshop Item (Speech)
Title:HIFiRE-1 Surface Pressure Fluctuations from High Reynolds, High Angle Ground Test
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Juliano, Thomas J.UNSPECIFIEDUNSPECIFIED
Kimmel, Roger L.UNSPECIFIEDUNSPECIFIED
Willems, Sebastiansebastian.willems (at) dlr.deUNSPECIFIED
Gülhan, Aliali.guelhan (at) dlr.deUNSPECIFIED
Schneider, Steven P.Purdue UniversityUNSPECIFIED
Date:January 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2014-0429
Status:Published
Keywords:transition, cone, angle of attack, HIFiRE 1
Event Title:52nd Aerospace Sciences Meeting
Event Location:Washington D.C., United States of America
Event Type:international Conference
Event Dates:13.-17. Jan. 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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