VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University311110.18287/2541-7533-2016-15-3-70-80UnknownExperimental research of the closed-type gas-dynamic mixerLepeshinskyI. A.<p><span lang="EN-US">Doctor of Science (Engineering), Professor</span></p>igorlepesh@yandex.ruReshetnikovV. A.<p><span lang="EN-US">Candidate of Science (Physics and Mathematics)</span></p>vresh031152@mail.ruZarankevichI. A.<p><span lang="EN-US">postgraduate student</span></p>zarankevich@yandex.ruIstominE. A.<p><span lang="EN-US">Candidate of Science (Engineering)<br />Deputy Chief Designer</span></p>eistomin@inbox.ruAntonovskyI. V.<p><span lang="EN-US">postgraduate student</span></p>antonovskij@mail.ruGuzenkoA. A.<p><span lang="EN-US">postgraduate student</span></p>a_guzenko_89@mail.ruMoscow Aviation Institute (National Research University)Experimental Design Bureau «Kristall»0912201615370802812201628122016Copyright © 2016, VESTNIK of Samara University. Aerospace and Mechanical Engineering2016<p>The article presents a new gas-dynamic mixer a closed-type one. The structure of a two-phase flow generated by the mixer, the disperse phase velocity diagram, the size and concentration of drops are experimentally investigated. Pulsation characteristics of a disperse phase are calculated. The mixer ensures the operation of a system that produces high-concentration two-phase gas-droplet streams for various values of consumption and pressure of working fluids. It is established, that, thanks to the presence of air in a two-phase working fluid the liquid is accelerated in the initial part of the stream and then it is decelerated. It should be noted that the stream under consideration is a polydisperse one: there are sites of very small particles which the optics practically does not resolve, and there are very large drops. The results of dispersion measurements using different methods are in close agreement. It is also experimentally established that the maximum pulsations take place at the nozzle outlet and there are local minima in the two-phase stream.</p>Gas-dynamic mixertwo-phase flowdispersed phasevelocitysize and concentrations fieldsPIV-methodfluctuating velocityГазодинамический смесительдвухфазный потокдисперсная фазаполя скоростейразмеров и концентрацийPIV-методпульсационная скорость[1. Zuev Yu.V., Istomin E.A., Lepeshinskiy I.A., Reshetnikov V.A., Chabanov V.A. Razrabotka i issledovanie smesitel'nykh ustroystv. Materialy X Mezhdunarodnoy konferentsii po neravnovesnym protsessam v soplakh i struyakh «NPNG’ 2014». Moscow: Moscow Aviation Institute Publ., 2014. P. 96-98. (In Russ.)][2. Bantikov D.Y., Grechishnikov O.V., Rogalev V.V., Roslyakov A.D., Thybizov Yu.I. Ways of improving burners of two-staged combustion chambers. Vestnik of the Samara State Aerospace University. 2014. No. 5 (47), part 2. P. 88-94. (In Russ.)][3. Lund M.T., Sojka P.E., Lefebvre A.H., Gosselin P.G. Effervescent Atomization at Low Mass Flow Rates. Part 1: The Influence of Surface Tension. Atomization and Sprays. 1993. V. 3, Iss. 1. P. 77-89. DOI: <a href='http://doi.org/10.1615/atomizspr.v3.i1.40'>10.1615/atomizspr.v3.i1.40</a>][4. Raffel M., Willert C., Kompenhans J. Particle Image Velocimetry. Berlin: Springer, 1998. 252 p.][5. Zimin E.P., Krugerskiy A.M., Pozharnov V.A. Ispol'zovanie invariantov malouglovogo rasseyaniya sveta dlya diagnostiki dispersnoy fazy gazozhidkostnoy smesi. Mezhvuzovskiy tematicheskiy sbornik nauchnykh trudov «Gazotermodinamika mnogofaznykh potokov v energoustanovkakh».Vypusk 2. Kharkiv: Kharkiv Aviation Institute Publ., 1979. P. 125-130. (In Russ.)][6. Zuev Yu.V., Istomin E.A., Lepeshinskii I.A., Reshetnikov V.A., Chabanov V.A. System of the laser measurements by particulate composition for two-phase flows. Vestnik Moskovskogo Aviatsionnogo Instituta. 2014. V. 21, no. 5. P. 80-87. (In Russ.)][7. National Instruments. Available at: <a href='http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_count_objects_2/'>http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_count_objects_2/</a>]