减压炉弯管流动阻力特性及其影响因素分析

乙烯工业 ›› 2026, Vol. 38 ›› Issue (3): 20-26.

减压炉弯管流动阻力特性及其影响因素分析

孙宇婷

中国石化工程建设有限公司，北京 100101

收稿日期:2025-08-11 修回日期:2025-09-26 出版日期:2026-09-25 发布日期:2026-09-28
作者简介:孙宇婷，女，1991年毕业于北京化工大学过程装备与控制工程专业，工学学士，现从事石油化工加热炉设备设计工作，工程师。

Analysis of Flow Resistance Characteristics and Influencing Factors of Vacuum Furnace Bends

Sun Yuting

SINOPEC Engineering Incorporation, Beijing, P.C.100101

Received:2025-08-11 Revised:2025-09-26 Online:2026-09-25 Published:2026-09-28

摘要/Abstract

摘要：

盘管系统为管式加热炉的核心部件，弯管是其中的重要连接件。利用Fluent软件对减压炉的急弯弯管和异径弯管的流动阻力特性开展研究，得到弯管内沿程以及各截面的速度分布、压力分布及流线形态，总结了汽化率、入口流速、变径比和弯径比对阻力降的影响规律。结果显示，急弯弯管阻力降优于异径弯管，弯管内流动呈现螺旋流及双涡旋二次流甚至是四涡旋二次流的特点，弯管内流动对下游影响区域显著，弯管阻力降随汽化率和流速的增加呈现抛物线型变化趋势。

关键词: 减压炉 , 盘管系统 , 急弯弯管 , 异径弯管 , 阻力特性二次流

Abstract:

Coil system is the core component of a tubular heating furnace, and bends are critical connecting elements within it. This paper uses Fluent to study the flow resistance characteristics of sharp bends and reducing bends in vacuum furnaces to obtain the velocity distribution, pressure distribution and streamline pattern along the flow path and at each cross-section inside the bends, and summarizes the influence laws of vaporization rate, inlet flow velocity, diameter ratio and bend diameter ratio on pressure drop. Results show that sharp bends outperform reducing bends in terms of pressure drop. The flow inside the bends presents characteristics of helical flow, double-vortex secondary flow, and even four-vortex secondary flow. The flow inside the bends has a significant influence on the downstream affected area, and the pressure drop of the bends shows a parabolic variation trend with the increase of vaporization rate and flow velocity.

Key words: vacuum furnace, coil system, sharp bend, reducing bend, resistance characteristics, secondary flow

孙宇婷. 减压炉弯管流动阻力特性及其影响因素分析[J]. 乙烯工业, 2026, 38(3): 20-26.

Sun Yuting. Analysis of Flow Resistance Characteristics and Influencing Factors of Vacuum Furnace Bends[J]. Ethylene Industry, 2026, 38(3): 20-26.