naa a22 4500 510758452 CHVBK 20180411083130.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1134/S0869864313060073 doi (NATIONALLICENCE)springer-10.1134/S0869864313060073 Experimental investigation of the effect of small-obstacle-induced vortex sheet on the separated flow in cavity [Elektronische Daten] [A. D'yachenko, V. Terekhov, N. Yarygina] In the present paper, we report results of an experimental study of the influence which a vortex-generating element installed upstream of the main obstacle has on the separated flow and heat transfer in a cross-flow cavitytrench. The element was a small cross-flow rib whose height was an order of magnitude smaller than the depth of the cavity. In the experiments, the variable parameters were the angle of inclination of the frontal and rear walls of the cavity, the rib height, and the rib-to-cavity distance. It is shown that the introduction of additional vortical perturbations into the recirculation zone leads to a substantial modification of both the vortex production process and the distributions of pressure and heat-transfer coefficients. Optimal height of the mini-turbulizer and its optimal location are defined by the fall of the re-attachment point of mini-rib-generated flow onto the rear wall of cavity. In the latter situation, the maximal value of the heat-transfer coefficient increases as compared to the case with no vortex generator used, the increase amounting to 30 %. Pleiades Publishing, Ltd., 2013 cross-flow cavity nationallicence separated turbulent flow nationallicence thermographic visualization nationallicence heat transfer nationallicence pressure coefficients nationallicence instability nationallicence D'yachenko A. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia aut Terekhov V. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia aut Yarygina N. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia aut Thermophysics and Aeromechanics Kutateladze Institute of Thermophysics SB RAS 20/6(2013-12-01), 705-712 0869-8643 20:6<705 2013 20 11510 https://doi.org/10.1134/S0869864313060073 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0869864313060073 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- D'yachenko A. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Terekhov V. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Yarygina N. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia aut NATIONALLICENCE 773 0- Thermophysics and Aeromechanics Kutateladze Institute of Thermophysics SB RAS 20/6(2013-12-01), 705-712 0869-8643 20:6<705 2013 20 11510 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer