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Attenuation and shape effects on IR transceiver irradiation behaviour during air–hydrogen peroxide two-phase flow

N. Mithran, S. Aafrin Sulthana, and M. Venkatesan

SASTRA Deemed University, Thanjavur, India

 

E-mail: mvenkat@mech.sastra.edu

Abstract: Hydrogen peroxide is a green propellant used in nanosatellites for micro-propulsion. The flow pattern and concentration of hydrogen peroxide decide the thrust produced in such micro-thrusters in which the thrust is of the order of milli-Newton. A mini/micro-fluidic cross-sectional geometry can dramatically vary the fluid flow characteristics, particularly for a capillary-driven flow in such devices. In the present work, experiments are carried out in a mini-square channel of 50 × 2 × 2 mm size and thickness of 0.5 mm with air–hydrogen peroxide as two-phase flow fluids. Bubble and slug flow regimes formed during the flow are recorded using a PROMON high-speed camera. An infrared transceiver circuit is used for identifying the flow regimes. COMSOL Multiphysics package is used to develop a numerical model. The developed numerical model is validated with the experiments by comparing the signal behaviour. The shape effects of the square, circular, and triangular channel on IR transceiver irradiation during two-phase flow are detailed. The effects of dimensional ratio of the test section on IR transceiver irradiation are discussed. The attenuation behaviour of the hydrogen peroxide fluid (6, 30, and 50% concentration) on IR transceiver irradiation during two-phase flow is presented.

Keywords: Infrared sensor ; COMSOL Multiphysics ; Hydrogen peroxide ; Two-phase flow ; Square channel ; Triangular channel 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00831-9

 

Chemical Papers 73 (11) 2783–2792 (2019)

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