关于垂直旋风燃烧器系统气体-固体双相流量特征的实验研究
Weihui Xu1, Yaoyi Tang1, Han Wang1
1School of Electric Power, North China University of Water Resources and Electric Power, Henan 450045, China.
ACS omega
|December 18, 2023
概括
这项研究通过分析空气流和粉碎煤流来优化旋风燃烧器的性能. 确定了最佳的初级空气旋角度和速度,以改善流量分布并减少垂直升降机的压力下降.
科学领域:
- 燃烧工程 燃烧工程
- 流体动力学 流体动力学
- 颗粒技术 颗粒技术
背景情况:
- 旋风燃烧器是炉中有效燃烧的关键部件.
- 了解垂直升降器的流动动力学和压力下降是优化燃烧器性能的关键.
研究的目的:
- 为了研究各种参数对垂直旋风燃烧器流量分布和压力下降特征的影响.
- 为了建立一个相关公式来预测垂直起升机内的气体固体二相流的压力下降.
主要方法:
- 一个用于旋风燃烧器的冷状态实验平台是使用相似性原理设计和建造的.
- 进行了系统的实验,分析了旋转角度,煤炭度,操作参数和颗粒大小的影响.
- 应用了维度分析和巴斯的额外压力下降理论来得出压力下降公式.
主要成果:
- 最均的流量分布是通过30°的主要空气旋转风扇角度实现的.
- 粉碎煤的度和颗粒大小显著增加了压力下降;更高的度和更大的颗粒导致了更大的压力下降.
- 最佳初级空气速度的最小压力下降被发现为7.5m/s,而二级空气速度为22m/s导致最大压力下降.
结论:
- 优化旋转风扇角度和初级空气速度对于高效的流量分配和减少旋风燃烧器压力下降至关重要.
- 颗粒体大小和度直接影响压力下降,需要在炉运行时进行仔细控制.
- 一个衍生的相关性公式提供了一个预测工具,用于气体固体双相流量压力下降在垂直升降器.
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