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Open Access

ARTICLE

Numerical Simulation and Optimization of the Gas-Solid Coupled Flow Field and Discharging Performance of Straw Crushers

Yuezheng Lan1, Yu Zhao2,*, Zhiping Zhai1, Meihua Fan2, Fushun Li2
1 College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China
2 College of Mechanical & Electrical Engineering, Qiqihar University, Qiqihar, 161000, China
* Corresponding Author: Yu Zhao. Email: email
(This article belongs to the Special Issue: Aerodynamic Analysis and Optimal Design of Fluid Machinery)

Fluid Dynamics & Materials Processing https://doi.org/10.32604/fdmp.2024.053362

Received 29 April 2024; Accepted 16 July 2024; Published online 15 August 2024

Abstract

The quality of crushing, power consumption, and discharging performance of a straw crusher are greatly influenced by the characteristics of its internal flow field. To enhance the straw crusher’s flow field properties and improve the efficiency with which crushed material is discharged, first, the main structural parameters influencing the air flow in the crusher are discussed. Then, the coupled gas-solid flow field in the straw crusher is numerically calculated through solution of the Navier-Stokes equations and application of the discrete element method (DEM). Finally, the discharge performance index of the crusher is examined through detailed analysis of the crushed material dynamics. Additionally, a multi-island genetic algorithm is used to optimize the structure and operational factors that have significant effects on the discharge performance. With optimization, the accumulation rate of crushed materials in the bottom region of the straw crusher decreases by 20.08%, and the mass flow rate at the discharge outlet increases by 11.63%.

Keywords

Straw crusher; CFD–DEM; gas-solid coupling flow field; discharging performance; multi-island genetic algorithm

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