Measurement of number densities in supersonic flows using a method based on laser-induced acetone fluorescence

Measurement of number densities in supersonic flows using a method based on laser-induced acetone... A method that is based on laser-induced fluorescence (LIF) and that involves the use of acetone as a seed can be utilized for measurement of supersonic flows with high temporal and spatial resolutions. In the present study, the feasibility of using this method to measure the number density in supersonic flows at temperatures lower than the atmospheric temperature is investigated. An experiment in which low-temperature conditions are created by supersonic isentropic flows in a convergent–divergent nozzle is carried out. LIF is realized by exciting acetone with the fourth harmonic of a Nd:YAG laser, and the LIF signal is detected by a CCD camera with an image intensifier. In order to theoretically determine the LIF characteristics, a multistep decay model that can be used for temperatures of 300–900 K is extended so that it can be used in the low-temperature regime. The constant included in the model is redetermined by fitting the model to the present experimental data. The LIF calculated by using this extended model is found to agree very well with the experimental data. The model also indicates that the number density measured by the LIF method in the temperature range 170–290 K is insensitive to temperature. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Measurement of number densities in supersonic flows using a method based on laser-induced acetone fluorescence

Loading next page...
 
/lp/springer_journal/measurement-of-number-densities-in-supersonic-flows-using-a-method-SbLaU3e0Tm
Publisher
Springer-Verlag
Copyright
Copyright © 2010 by Springer-Verlag
Subject
Engineering; Engineering Thermodynamics, Heat and Mass Transfer; Fluid- and Aerodynamics; Engineering Fluid Dynamics
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-010-1029-3
Publisher site
See Article on Publisher Site

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial