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Simplified Model for Flow-heating Effect on Wave-drag Reduction of Blunt Bodies

Schülein, Erich (2014) Simplified Model for Flow-heating Effect on Wave-drag Reduction of Blunt Bodies. 19. DGLR-Fachsymposium der STAB, 04. – 05. Nov. 2014, München, Deutschland.

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Official URL: http://www.stab2014.tum.de


This paper presents an analytical model describing the flow-heating effect on the wave-drag reduction of blunt bodies. The key mechanism simulated is the phenomenon called “hot-spike” effect. Due to the heating of the initially supersonic flow in particular the stagnation pressure are decreased inside the heated wake. If the deficit of the total pressure upstream of the bow shock wave becomes high enough, a free recirculation bubble in the front of a blunt body accompanied by a favorable transformation of the bow-shock structure appears. The validation of the method is conducted by experimental and numerical results obtained former at Mach 3. The comparison presented demonstrates excellent agreement particularly for detached-shock model configurations (hemisphere or blunt cone).

Item URL in elib:https://elib.dlr.de/89086/
Document Type:Conference or Workshop Item (Speech)
Title:Simplified Model for Flow-heating Effect on Wave-drag Reduction of Blunt Bodies
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schülein, Ericherich.schuelein (at) dlr.deUNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 62-63
Series Name:Jahresbericht 2014
Keywords:Drag reduction, hot-spike effect, energy deposition, effectiveness ratio, heating power ratio
Event Title:19. DGLR-Fachsymposium der STAB
Event Location:München, Deutschland
Event Type:national Conference
Event Dates:04. – 05. Nov. 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Micknaus, Ilka
Deposited On:12 Nov 2014 13:18
Last Modified:12 Nov 2014 13:18

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