在具有可调节活性壁和灵活分离器的八角形腔中,对自由对流的热力学分析
Mohamed Boujelbene1, Awatef Abidi2, S A M Mehryan3
1Industrial Engineering Department, College of Engineering, University of Ha'il, 55476, Ha'il, Saudi Arabia.
Scientific reports
|February 8, 2025
概括
这项关于八边形腔中的自由对流的研究表明,正倾斜的分离器可以改善传热. 最佳的墙壁放置和分离器定向将压力降至最低,并增强对流传热传输.
科学领域:
- 热传递热量转移的方法
- 流体动力学 流体动力学
- 交流是指对流的交流.
背景情况:
- 在隔离腔中自由对流对于热管理至关重要.
- 灵活的分离器引入复杂的流体结构相互作用.
- 了解这些相互作用是优化传热和结构完整性的关键.
研究的目的:
- 为了研究带有柔性分离器的分隔八角形腔体中的自由对流传热传输.
- 分析主动墙壁位置和分离器方向对流量和热传输的影响.
- 模拟分离器变形及其对热性能和应力的影响.
主要方法:
- 使用任意拉格朗-欧勒尔 (ALE) 方法对分离器变形进行自由对流的数值模拟.
- 参数研究涉及活动墙壁位置 (热/冷),分离器方向 (垂直,倾斜的正/负斜率) 和雷利号.
- 分析温度分布,流量模式,传热率 (努塞尔特数) 和分离器应力.
主要成果:
- 将热壁位于上方,冷壁位于下方,可以抑制对流,减少分离器应力.
- 两个活跃壁面的向上移动会降低空腔的平均温度.
- 与垂直或负倾斜的配置相比,正倾斜的分离器可以增强热传递并最大限度地减少压力.
- 增加的雷利数加剧了流量和分离器应力.
- 降低分离器的弹性模块可以提高平均努塞尔特数.
结论:
- 分离器的方向和活跃的墙壁放置显著影响自由对流和应力分布.
- 一个正倾斜的分离器为热传递增强和压力减轻提供最佳性能.
- 材料特性,特别是弹性,在对流传热传递效率中起作用.
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