TY - JOUR
T1 - An injection head to generate a stable falling liquid film within a circular duct
AU - Borraz, Luis
AU - Larrainzar, Fernando
AU - Sánchez-Silva, Florencio
AU - Reyes-Nava, Juan A.
AU - Carvajal-Mariscal, Ignacio
AU - Beltrán, Alberto
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive licence to The Brazilian Society of Mechanical Sciences and Engineering.
PY - 2022/12
Y1 - 2022/12
N2 - An injection head system was designed and mounted to generate a falling water film in a circular duct with five air jets. The internal diameter of the duct is 94.56 mm. Reynolds number for water is in the range of Re in,w = 16,046–19,366; whereas, for the air we have Re in,a = 0–32,177. The system is able to generate a uniform water film inside a circular duct. The water film flow is measured with the PIV technique. An air flow is injected into the center of the injection head through five nozzles. The stability and resistance of the water film to the air jets for different flow conditions are verified. In addition, numerical simulations for the water film flow are performed with the open source CFD library OpenFOAM. In particular, the interFoam solver is coupled to a LES κ-equation turbulence model to capture the water-air interface. In all cases, it is observed an undulatory flow behavior described by the axial variation of the interaction of the air and water phases. Although the nature of the flow is unstable, numerical and experimental results show a stable water film thickness.
AB - An injection head system was designed and mounted to generate a falling water film in a circular duct with five air jets. The internal diameter of the duct is 94.56 mm. Reynolds number for water is in the range of Re in,w = 16,046–19,366; whereas, for the air we have Re in,a = 0–32,177. The system is able to generate a uniform water film inside a circular duct. The water film flow is measured with the PIV technique. An air flow is injected into the center of the injection head through five nozzles. The stability and resistance of the water film to the air jets for different flow conditions are verified. In addition, numerical simulations for the water film flow are performed with the open source CFD library OpenFOAM. In particular, the interFoam solver is coupled to a LES κ-equation turbulence model to capture the water-air interface. In all cases, it is observed an undulatory flow behavior described by the axial variation of the interaction of the air and water phases. Although the nature of the flow is unstable, numerical and experimental results show a stable water film thickness.
KW - Annular flow
KW - Falling liquid film
KW - Film thickness
KW - LES model
KW - OpenFOAM
KW - PIV technique
UR - http://www.scopus.com/inward/record.url?scp=85141818779&partnerID=8YFLogxK
U2 - 10.1007/s40430-022-03885-1
DO - 10.1007/s40430-022-03885-1
M3 - Artículo
AN - SCOPUS:85141818779
SN - 1678-5878
VL - 44
JO - Journal of the Brazilian Society of Mechanical Sciences and Engineering
JF - Journal of the Brazilian Society of Mechanical Sciences and Engineering
IS - 12
M1 - 583
ER -