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Verifying microexha...
Verifying microexhausts with schlieren imaging
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- Lekholm, Ville, 1976- (författare)
- Uppsala universitet,Mikrosystemteknik
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- Palmer, Kristoffer (författare)
- Uppsala universitet,Mikrosystemteknik
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Johansson, Håkan (författare)
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Rangsten, Pelle (författare)
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- Thornell, Greger (författare)
- Uppsala universitet,Mikrosystemteknik
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(creator_code:org_t)
- 2010
- 2010
- Engelska.
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Ingår i: Proceedings of the 2nd International Conference on Space Propulsion, San Sebastián, Spain, May 3-6, 2010.
- Relaterad länk:
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Schlieren imaging is a method to visualize differences in refractive index within a medium. It is an inexpensive, yet powerful and straightforward tool, for sensitive and high-resolution visualization of gas flows. Here, heated cold gas microthrusters were studied with schlieren imaging techniques. The thruster chips are manufactured using MEMS technology, and measure 22*22*0.85 mm. The nozzles are approximately 20 µm wide at the throat, and 350 µm wide at the exit. Through these studies, verification and direct visualization of the functionality of the thrusters were possible. At atmospheric pressure, slipping of the exhaust was observed, due to the severe overexpansion of the nozzle. In vacuum, the nozzle was underexpanded, and the flow was seen to be supersonic. There was a measurable change in the exhaust with heaters activated. It was also shown that the method can be used to detect leaks, making it a valuable, quick, safe, and inexpensive aid in quality control of the thrusters.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Nyckelord
- micropropulsion
- schlieren imaging
- microthrusters
- Other materials science
- Övrig teknisk materialvetenskap
- Teknisk fysik med inriktning mot mikrosystemteknik
- Engineering Science with specialization in Microsystems Technology
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)