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Transition Prediction for Hypersonic Conical Flows with Active Cooling

Reiter, Philipp (2016) Transition Prediction for Hypersonic Conical Flows with Active Cooling. Other, Technische Universität Branuschweig/ DLR Institut für Aerodynamik und Strömungstechnik.

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Abstract

The purpose of this research is to identify the influence of effusion mass fluxes and various nose radii on the boundary layer instability for a hypersonic flow and predict the transition location. The laminar-turbulent boundary layer transition for hypersonic vehicles is of great importance, because it can significantly increase the frictional resistance and the heat transfer coefficients. Effusion cooling uses various mass flows blown out through a porous ceramic for cooling the surface. This type of cooling is also called effusion. The investigations were carried out for Ma = 10 hypersonic flow past a 7° half angle blunted. The numerical stability analysis is performed with the DLR Code NOLOT which solves the equations of the linear stability theory. The critical N-factors are assessed by means of previous experiments at the HEG wind tunnel in Göttingen. Growth rates and N-factors for different nose radii and various effusion mass fluxes were calculated, and consequently the transition locations were determined.

Item URL in elib:https://elib.dlr.de/108287/
Document Type:Thesis (Other)
Title:Transition Prediction for Hypersonic Conical Flows with Active Cooling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Reiter, PhilippPhilipp.Reiter (at) dlr.deUNSPECIFIED
Date:30 September 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:70
Status:Published
Keywords:Effusion Cooling, Transition, Hypersonic boundary layer flows
Institution:Technische Universität Branuschweig/ DLR Institut für Aerodynamik und Strömungstechnik
Department:Abteilung Raumfahrzeuge
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Wiederverwendbare Raumfahrtsysteme
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Hink, Rüdiger Reiner
Deposited On:29 Nov 2016 10:34
Last Modified:29 Nov 2016 10:34

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