kth.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Design and optimization of a pulsed power generator for electrical wire explosion
KTH, School of Engineering Sciences (SCI).
2024 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This master's thesis aims to develop robust techniques for inducing extreme conditions in fluids by employing a Pulsed Power Generator (PPG). The project focuses on studying and controlling electrically induced single-wire explosions to efficiently produce shock waves in air and water. An in-depth literature review is conducted, followed by an exploration of the necessary theoretical background to understand the multidisciplinary physical phenomena. A methodology is developed to ensure the safe operation of the PPG, along with defining the Schlieren optical setup and operating procedures for the high-speed camera capable of reaching rates up to 10 million frames per second. The electrical parameters of the PPG are determined through short-circuit experiments and compared to an analogous RLC-like circuit using analytical and numerical simulations. Systematic experimentation is conducted across different copper wire diameters of 150, 400 and 500 micrometres and different initial capacitor voltages up to 23 kV. The optimal explosion conditions are identified, notably with a wire diameter of 400 micrometres in air, resulting in peak pressures in the order of hundreds of bar and Mach numbers up to 21.4. In water, the peak pressures reach tens of kilobar and Mach numbers up to 1.8. The analysis quantifies the transferred electrical energy and initial mechanical energy of the shock waves, reaching power magnitudes in the order of gigawatts and electrical-to-mechanical energy transfer efficiency up to 34%. The results are compared with numerical simulations and existing literature, culminating in a comprehensive report that synthesizes findings from literature review, hands-on experimentation, and analysis.

Place, publisher, year, edition, pages
2024.
Series
TRITA-SCI-GRU ; 2024:297
Keywords [en]
Pulserande Kraftgenerator, Elektriskt Inducerad Ledningsexplosion, Stötvågsgenerering, Kompressibel Strömningsdynamik, Högspänningsteknik
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-348516OAI: oai:DiVA.org:kth-348516DiVA, id: diva2:1876793
Supervisors
Examiners
Available from: 2024-06-25 Created: 2024-06-25 Last updated: 2024-12-17Bibliographically approved

Open Access in DiVA

fulltext(3489 kB)189 downloads
File information
File name FULLTEXT01.pdfFile size 3489 kBChecksum SHA-512
7c23883d0e059f9baa991ce0e7265b556b06109143dddde457584e913cdc96f14bd5bcd4af902362adaca8538ca3d156811d7a420947ddf6284ab1f8f5635b2d
Type fulltextMimetype application/pdf

By organisation
School of Engineering Sciences (SCI)
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 189 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 446 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf