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Numerical investigation of supersonic inlets for ramjets

Seccia, Gianluca (2018) Numerical investigation of supersonic inlets for ramjets. Master's, POLITECNICO DI MILANO.

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Abstract

The Parameters,models and schemes affecting the stable and accurate resolution of a pseudo-shock system when numerically computing the strong ad- , models and schemes affecting the stable and accurate resoluverse pressure gradient flow for a supersonic inlet for ramjet applications with the DLR TAU code have been investigated. Concomitantly, a stabilizing technique for the start-up phase of the computation on two-dimensional domains of reduced length, where the backpressure is imposed directly at the outlet, has been assessed. This allows to spare grid size by a significant amount, avoiding the need of a second throat bringing the flow to supersonic conditions at the outlet, and it could be an advantage during preliminary design studies. At the same time, it leads to ill-posedness of the problem, therefrom the need of a stabilizing technique during start-up and improvement of the stability parameters. Two inlet configurations have been studied at a design Mach number of 3 for increasing values of the backpressure: a base configuration without bleed and a bleed configuration featuring a boundary layer bleeding slot on the bottom wall. Results have been compared to experimental data and schlieren visualizations.

Item URL in elib:https://elib.dlr.de/124118/
Document Type:Thesis (Master's)
Title:Numerical investigation of supersonic inlets for ramjets
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Seccia, GianlucaGianluca.Seccia (at) dlr.deUNSPECIFIED
Date:2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:176
Status:Published
Keywords:Ramjet, inlet, DLR TAU Code, wind tunnel experiments, Trisonische Messstrecke Köln (TMK)
Institution:POLITECNICO DI MILANO
Department:Facoltà di Ingegneria Industriale
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
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Deposited By: Herrmann, Dirk
Deposited On:11 Dec 2018 09:02
Last Modified:11 Dec 2018 09:02

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