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Investigation of hot plume impact on space launch vehicle aft-body flows

Schumann, Jan-Erik (2022) Investigation of hot plume impact on space launch vehicle aft-body flows. Dissertation, Promotionszentrum für Ingenieurwissenschaften am Forschungscampus Mittelhessen, Gießen. doi: 10.22029/jlupub-7550.

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Official URL: https://jlupub.ub.uni-giessen.de//handle/jlupub/8135


The transonic flow around generic space launch vehicle aft-body geometries is investigated numerically using hybrid RANS-LES methods. A sensitivity study shows that the qualitative results are mostly insensitive to changes in grid resolution and numerical settings, but certain aspects such as circumferential grid resolution and LES filter length definition can affect the obtained quantitative results. It is further found that the presence of a plume leads to the appearance of an additional spectral contribution in the flow. The main investigations showed that changing the plume properties leads to a downstream shift of the reattachment location due to the stronger acceleration of the external flow. An increased wall temperature leads to a similar shift that is attributed to the slower development of turbulent structures in higher temperature shear layers. As a consequence the pressure fluctuations and the nozzle forces are reduced as well. However, the underlying flow phenomena are unaffected by the plume properties and wall temperature, with the exception of an additional spectral feature in the pressure fluctuations due to the interaction of shear layer movement and nozzle flow plume separation once the reattachment occurs mostly beyond the nozzle lip. A shorter nozzle strongly affects the recirculation region shape, pressure fluctuations and nozzle forces and does not show the observed flow phenomena observed for the longer nozzle configuration.

Item URL in elib:https://elib.dlr.de/191957/
Document Type:Thesis (Dissertation)
Title:Investigation of hot plume impact on space launch vehicle aft-body flows
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:Yes
Open Access:Yes
Number of Pages:157
Keywords:scale resolved turbulent flow simulation, rocket afterbody flow, base buffeting,
Institution:Promotionszentrum für Ingenieurwissenschaften am Forschungscampus Mittelhessen, Gießen
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Reusable Space Systems and Propulsion Technology
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Hannemann, Dr.rer.nat. Volker
Deposited On:09 Dec 2022 10:34
Last Modified:09 Dec 2022 10:34

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