文章信息/Info

Title:

Simulation of Atomization of High�睸peed Steel Powder Prepared by Electrode Induction Melting and Aeroatomization

文章編號(hào):

1674-3962(2025)11-1061-08

作者:

峰山; 張浩

內(nèi)蒙古工業(yè)大學(xué)材料科學(xué)與工程學(xué)院，內(nèi)蒙古 呼和浩特 010051

Author(s):

FENG Shan; ZHANG Hao

Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

關(guān)鍵詞:

數(shù)值模擬; 一次霧化; 二次霧化; 高速鋼液流; 粒徑分布; 拉瓦爾噴管

Keywords:

numerical simulation;  primary atomization;  secondary atomization;  high�瞫peed steel molten flow;  particle size distribution;  Laval nozzle

分類號(hào):

TF123

DOI:

10.7502/j.issn.1674-3962.202401016

文獻(xiàn)標(biāo)志碼:

A

摘要:

電極感應(yīng)熔化氣霧化(EIGA)是制備超潔凈無(wú)夾雜物粉末的先進(jìn)技術(shù)。霧化制粉過程涉及多物理場(chǎng)耦合，機(jī)理復(fù)雜，難以實(shí)現(xiàn)精準(zhǔn)調(diào)控，而數(shù)值模擬可以進(jìn)行可視化呈現(xiàn)。根據(jù)拉瓦爾噴管結(jié)構(gòu)原理，運(yùn)用SolidWorks建模軟件構(gòu)建非限制式噴嘴結(jié)構(gòu)模型，并導(dǎo)入流體力學(xué)Fluent軟件進(jìn)行兩相流模擬。高速鋼液流的霧化過程分為一次霧化與二次霧化，采用精度更高的大渦模擬法（LES）結(jié)合自適應(yīng)網(wǎng)格方法，對(duì)不同直徑（3，4和5 mm）的液流進(jìn)行霧化模擬。當(dāng)出口質(zhì)量流量趨于穩(wěn)定，視為完成一次霧化模擬過程。二次霧化是在一次霧化的基礎(chǔ)上建立子模型，并提取粒徑為0.5 mm的單液滴進(jìn)行模擬。結(jié)果表明，超音速氣體射流對(duì)高速鋼液流進(jìn)行沖擊霧化，在一次霧化過程中，隨著高速鋼液流直徑的增大，其破碎成液滴群的平均粒徑也變大。二次霧化采用更加精密的網(wǎng)格以捕捉破碎霧化后更加細(xì)小的液滴，模擬液滴粒徑主要分布在50~250 μm。

Abstract:

Electrode induction melting gas atomization (EIGA) is an advanced powder preparation technology for producing ultra-clean, inclusion-free powders. The atomization powder preparation process involves multi-physical fields coupling, complex mechanisms make atomization difficult to achieve precise control, while numerical simulation can intuitively represent this intricate and hard-to�瞞aster process. Based on the structural principle of the Laval nozzle, a supersonic nozzle model was constructed using the SolidWorks modeling software and imported into the computational fluid dynamics software Fluent for two-phase flow simulation. The atomization process of high-speed steel molten flow is divided into primary atomization and secondary atomization. A more accurate large eddy simulation (LES) method combined with adaptive mesh method was used to simulate the molten flow with different diameters (3, 4 and 5 mm). The primary atomization simulation was considered complete when the outlet mass flow rate tended to stabilize. For secondary atomization, a sub-model was established based on the primary atomization, and a single droplet with a particle size of 0.5 mm was extracted for simulation. The results show that the supersonic gas jet impacts and atomizes the high-speed steel molten flow. During the primary atomization process, as the diameter of the high-speed steel molten flow increases, the average particle size of the droplet group formed by its fragmentation also increases. The secondary atomization adopts a more precise mesh to capture the finer droplets generated by fragmentation and atomization. The simulation results indicate that the particle size of the droplet group is mainly distributed in the range of 50~250 μm.