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Experimental investigation of high-power laser irradiation of missile materials in subsonic and supersonic flows

Schäffer, Sebastian and Allofs, Dirk and Gruhn, Patrick and Gülhan, Ali and Lück, Martin and Osterholz, Jens (2022) Experimental investigation of high-power laser irradiation of missile materials in subsonic and supersonic flows. In: High-Power Lasers and Technologies for Optical Countermeasures 2022, 12273. SPIE Security + Defence 2022, Berlin, Germany. doi: 10.1117/12.2647841. ISBN 978-1-5106-5550-8. ISSN 0277-786X.

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Official URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12273/2647841/Experimental-investigation-of-high-power-laser-irradiation-of-missile-materials/10.1117/12.2647841.full?SSO=1

Abstract

The technology of missiles and of their countermeasures is evolving continuously. High-power lasers are an option to encounter these threats. In order to understand their potential in such a scenario, it is vital to investigate the laser effects in the presence of a corresponding aerodynamic environment. Thus, experimental and numerical investigations were conducted cooperatively by Fraunhofer Ernst-Mach-Institut and the supersonic and hypersonic technologies department of DLR. An ytterbium fiber laser system was installed at the supersonic wind tunnel VMK. The laboratory was fit to meet necessary laser safety requirements. Combined subsonic and supersonic flow and high-power laser experiments with flow velocities up to a Mach number of three and a laser power up to 10 kW were realized. Two kind of tests were performed, focusing on laser beam distortion through aero-optical effects and on high-power laser effects, respectively. The interaction effects between aerodynamics, laser radiation and irradiated targets were studied on flat-plates as well as cylindrical and radome targets, simulating generic missile design. Irradiated objects consisted of steel, aluminum, carbon-fiber-reinforced polymer and the ceramic-based composite WHIPOX. While beam distortions were studied with a wavefront sensor, damaging processes were investigated by measuring the perforation time of the targets, as well as via high-speed imaging, thermography as well as Schlieren imaging. Numerical three-dimensional, steady, and uncoupled simulations were performed. The data indicated complex interactions between material, laser beam, and aerodynamics. This investigation can be used as an initial basis for further analysis of laser-material-aerodynamic interactions with respect to missile defense.

Item URL in elib:https://elib.dlr.de/189670/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental investigation of high-power laser irradiation of missile materials in subsonic and supersonic flows
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schäffer, SebastianFraunhofer Ernst-Mach-Institut, FhG EMIUNSPECIFIEDUNSPECIFIED
Allofs, DirkUNSPECIFIEDhttps://orcid.org/0000-0002-3776-1853UNSPECIFIED
Gruhn, PatrickUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gülhan, AliUNSPECIFIEDhttps://orcid.org/0000-0003-4905-5881UNSPECIFIED
Lück, MartinFraunhofer Ernst-Mach-Institut, FhG EMIUNSPECIFIEDUNSPECIFIED
Osterholz, JensFraunhofer Ernst-Mach-Institut, FhG EMIUNSPECIFIEDUNSPECIFIED
Date:2 November 2022
Journal or Publication Title:High-Power Lasers and Technologies for Optical Countermeasures 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:12273
DOI:10.1117/12.2647841
Series Name:Proceedings of SPIE
ISSN:0277-786X
ISBN:978-1-5106-5550-8
Status:Published
Keywords:Supersonic, Subsonic, Missile Defence, High Power Laser, Laser Defence, Material-Flow-Beam Interaction, Experimental, Numerical
Event Title:SPIE Security + Defence 2022
Event Location:Berlin, Germany
Event Type:international Conference
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L DT - Defense Technology
DLR - Research theme (Project):L - Effect
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Allofs, Dirk
Deposited On:24 Nov 2022 10:33
Last Modified:17 Nov 2023 12:20

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