TY - JOUR

T1 - Study of the gas-droplet outflow from a microchannel nozzle device

AU - Gatapova, E. Ya

N1 - The study was supported by the grant from the Russian Science Foundation (Project No. 22-19-00581), https://www.rscf.ru/en/project/22-19-00581/.

PY - 2025/3/12

Y1 - 2025/3/12

N2 - High-speed shadow imaging of a gas-droplet flow from a microchannel nozzle device was performed by varying the liquid flow rate from 1 to 50 ml/min and the gas pressure drop from 0.5 to 8 bar. For this purpose, an optical system with a stereomicroscope was assembled to ensure a large depth of field and relatively high resolution. The outflow was studied for two types of nozzles: a three-nozzle device with an internal channel diameter of 200 µm and a custom-made nozzle with a microchannel silicon membrane of 243 µm thickness and a microchannel size of 10×10 µm. Spray angles for a single nozzle and an angle averaged over three nozzles were determined. Dependences of the angles on liquid flow rate for each pressure drop and dependences on pressure drop with varying liquid flow rate were obtained. It is shown that a uniform gas-droplet flow can be organized at the nozzle edge with small droplets using a microchannel membrane.

AB - High-speed shadow imaging of a gas-droplet flow from a microchannel nozzle device was performed by varying the liquid flow rate from 1 to 50 ml/min and the gas pressure drop from 0.5 to 8 bar. For this purpose, an optical system with a stereomicroscope was assembled to ensure a large depth of field and relatively high resolution. The outflow was studied for two types of nozzles: a three-nozzle device with an internal channel diameter of 200 µm and a custom-made nozzle with a microchannel silicon membrane of 243 µm thickness and a microchannel size of 10×10 µm. Spray angles for a single nozzle and an angle averaged over three nozzles were determined. Dependences of the angles on liquid flow rate for each pressure drop and dependences on pressure drop with varying liquid flow rate were obtained. It is shown that a uniform gas-droplet flow can be organized at the nozzle edge with small droplets using a microchannel membrane.

KW - gas-droplet flow

KW - microchannels

KW - mixer

KW - nozzle

KW - shadow method

KW - spray

UR - https://www.mendeley.com/catalogue/f0a18c51-f1a9-38b5-a942-873637cf2415/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105000024111&origin=inward&txGid=0197b8b1a4afac3feb7b096f14e4d656

U2 - 10.1134/S0869864324040115

DO - 10.1134/S0869864324040115

M3 - Article

VL - 31

SP - 741

EP - 747

JO - Thermophysics and Aeromechanics

JF - Thermophysics and Aeromechanics

SN - 0869-8643

IS - 4

ER -