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Experimental Investigation on the Droplet Entrainment in the Air-Water Horizontal Stratified Flow
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  • Journal title : Journal of Energy Engineering
  • Volume 24, Issue 1,  2015, pp.114-122
  • Publisher : The Korea Society for Energy Engineering
  • DOI : 10.5855/ENERGY.2015.24.1.114
 Title & Authors
Experimental Investigation on the Droplet Entrainment in the Air-Water Horizontal Stratified Flow
Bae, Byeong Geon; Yun, Byong Jo; Kim, Kyoung Doo; Bae, Byoung Uhn;
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In the high convective gas flow condition, irregular shaped water waves from which droplet entrainment occurs are generated under horizontally stratified two-phase flow condition. KAERI proposed a new mechanistic droplet entrainment model based on the momentum balance equation consisting of the shear stress, surface tension, and gravity forces. However, this model requires correlation or experimental data of several physical parameters related to the wave characteristics. In the present study, we tried to measure the physical parameters such as wave slope, wave hypotenuse length, wave velocity, wave frequency, and wavelength experimentally. For this, an experiment was conducted in the horizontal rectangular channel of which width, height, and length are, respectively, 40 mm, 50 mm, and 4.2 m. In the present test, the working fluids are chosen as air and water. The PIV technique was applied not only to obtain images for phase interface waves but also to measure the velocity field of the water flow. Additionally, we developed the parallel wire conductance probe for the confirmation of wave height from PIV image. Finally, we measured the physical parameters to be used in the validation of new droplet entrainment model.
stratified flow;droplet entrainment;PIV;interfacial wave;parallel wire conductance sensor;
 Cited by
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