Analysis of Atomization Performance of Linear Laval Nozzle under Varied Water Pressures Based on VOF and DPM Models

Shanshan Tang; Mohd Danial Ibrahim; Andrew Ragai Henry Rigit; Wei Zhang; Chaokun Wei

doi:10.46604/ijeti.2024.13615

Authors

Shanshan Tang Faculty of Engineering, Anhui SanLian University, Hefei, China/Faculty of Engineering, University of Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
Mohd Danial Ibrahim Faculty of Engineering, University of Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
Andrew Ragai Henry Rigit Faculty of Engineering, University of Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
Wei Zhang Dongguan Mistec Spraying Technology Co., Ltd., Dongguan, China
Chaokun Wei Chery Automobile Corporation, Wuhu, China

DOI:

https://doi.org/10.46604/ijeti.2024.13615

Keywords:

linear laval nozzle, VOF, DPM, water pressure, atomizing performance

Abstract

Particulate matter from coal and stone operations is a primary air pollution source. The traditional nozzle requires high-pressure conditions, and the atomization droplets are large and uneven. This paper aims to study a linear Laval nozzle and investigate the impact of water pressure on atomization performance. The volume of fluid (VOF) model and discrete phase model (DPM) of Fluent are used to simulate the internal and external fields of the nozzle and analyze the velocity, droplet size, and atomization angle. The results show that the optimized water pressure parameters are 0.1 MPa with an air pressure of 0.5 MPa. Droplets in the middle are smaller, while those on the sides are larger. Compared to traditional nozzles, the water pressure is reduced by over 90%, and the Sauter mean diameter (SMD) decreases by over 50%. Moreover, the theoretical spray angle increases by approximately 150%.

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