2015 1(16)

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   Short abstract

 

Pages:

174 - 177

Language:

RU

Ref.:

3


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2015_1(16)_33.pdf

 

 

MEASURING THE CONCENTRATION OF FLUORESCENT IMPURITIES IN THE TURBULENT JET

Kravtsov Z.D.1,2, Dulin V.M.1,2, Lobasov A.S.1,2, Sharaborin D.K.1,2

1 Institute of Thermophysics SB RAS, Novosibirsk, Russia
2 Novosibirsk State University, Novosibirsk, Russia


Citation:

Kravtsov, Z.D., Dulin, V.M., Lobasov, A.S. and Sharaborin, D.K., (2015) Measuring the concentration of fluorescent impurities in the turbulent jet, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(16), PP. 174 - 177.


Keywords:

Laser diagnostics; PLIF; Mass transfer; Round turbulent jet


Abstracts:

The goal of this work was to obtain new experimental data for a distribution of passive impurities round of an axisymmetric turbulent jet. Modern non-invasive method based on a planar laser-induced fluorescence was used for the measurements. Submerged axisymmetric turbulent jet has been selected as an object of the measurement since it is a well-studied and therefore convenient for comparison with the results of numerical simulation. Acetone vapor, which concentration was maintained constant in the incoming stream, has been used as the impurities. For registration of the local signal of fluorescence vapor upon mixing the stream with the outside air we used a digital camera with an electro-optical converter, a quartz lens and optical filter. A tunable dye laser with a wavelength of 283 nm was applied for excitation of the fluorescence acetone vapor. The laser ray unfolded to the collimated light knife passing through the axis of the jet. During the research we got a value of an instant distribution of the concentration in a central plane in the turbulent round air jet with the acetone impurities and the volume concentration of the acetone vapor in a core of the jet. It was also explored the character of an intensity of the fluctuations concentration in the layer of the jet depending on the Reynolds number. The results of this work could be used for verification of the turbulent transport in shear flows models.


References:

  1. G.A. Zarruk, E.A. Cowen 2007 Simultaneous velocity and passive scalar concentration measurements in low Reynolds number neutrally buoyant turbulent round jets Exp Fluids (2008) 44:865-872.

  2. D.R. Webster, P.J. W. Roberts, L. Ra'ad Simultaneous DPTV/PLIF measurements of a turbulent jet. Experiments in Fluids 30 (2001).

  3. W.K. Adrian Law Velocity and concentration distributions of round and plane turbulent jets Journal of Engineering Mathematics (2006) 56: 69-7

 

 
     

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