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On the subsonic near-wake of a space launcher configuration without jet

Saile, Dominik and Kühl, Viktor and Gülhan, Ali (2019) On the subsonic near-wake of a space launcher configuration without jet. Experiments in Fluids, 60 (4), p. 50. Springer. DOI: 10.1007/s00348-019-2690-9 ISSN 0723-4864

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Official URL: https://doi.org/10.1007/s00348-019-2690-9

Abstract

Wake flows have been extensively investigated in the past mainly with the objective to reduce drag. The failure of Ariane 5 Flight 157 though revealed that the understanding has not been sufficient, which triggered a new series of base-flow investigations. Most of them scrutinized the dynamics of the flow at one specific point along the flight path either in the subsonic, transonic, or supersonic range. However, no coherent image of the flow topology development in terms of a parametric study is available so far. The current work addresses the question of a near-wake scaling of a generic space launcher configuration. This question is tackled experimentally by means of particle image velocimetry measurements in the vertical test section Cologne in the range of Mach 0.5, 0.6, 0.7, 0.8, and 0.9 for Reynolds numbers between Re_D=0.8 x 10^6 and 1.7 x 10^6. Results show the mean, the turbulence intensity, and the Reynolds shear stress distribution in the wake in comparison with the literature. In addition, data to the incoming boundary layer are provided and to the evolving shear layer. In that regime, the results indicate that the velocity and Reynolds stresses might be independent from the Mach and Reynolds number if scaled with the reattachment length. If this hypothesis holds true, it might be useful for the validation of numerical codes and for the initial determination of the flow field of space launchers in the design phase.

Item URL in elib:https://elib.dlr.de/126714/
Document Type:Article
Title:On the subsonic near-wake of a space launcher configuration without jet
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Saile, DominikDominik.Saile (at) dlr.dehttps://orcid.org/0000-0002-4631-2072
Kühl, ViktorViktor.Kuehl (at) dlr.deUNSPECIFIED
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Date:1 March 2019
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:60
DOI :10.1007/s00348-019-2690-9
Page Range:p. 50
Publisher:Springer
ISSN:0723-4864
Status:Published
Keywords:space transportation, near-wake flow, base flow, subsonic, flow separation, reattachment, recirculation bubble, particle image velocimetry, PIV, wind tunnel measurements, experiments, axisymmetric, backward-facing step
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 - Raumfahrzeuge Entwurf, Systemanalyse, Simulation, Messtechnik
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Deposited By: Saile, Dominik
Deposited On:22 Mar 2019 14:58
Last Modified:06 Sep 2019 15:25

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