化工学报 ›› 2024, Vol. 75 ›› Issue (8): 2777-2786.DOI: 10.11949/0438-1157.20240159

• 流体力学与传递现象 • 上一篇    下一篇

螺旋喷嘴内外流场特性的实验研究

赵亮(), 李雨桥, 张德, 沈胜强   

  1. 大连理工大学能源与动力学院,辽宁 大连 116024
  • 收稿日期:2024-02-04 修回日期:2024-05-11 出版日期:2024-08-25 发布日期:2024-08-21
  • 通讯作者: 赵亮
  • 作者简介:赵亮(1979—),男,博士,副教授,zlhmf@dlut.edu.cn
  • 基金资助:
    国家自然科学基金重点项目(51936002);国家自然科学基金青年项目(51406027)

Experimental study of internal and external field characteristics of spiral nozzle

Liang ZHAO(), Yuqiao LI, De ZHANG, Shengqiang SHEN   

  1. College of Energy and Power, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2024-02-04 Revised:2024-05-11 Online:2024-08-25 Published:2024-08-21
  • Contact: Liang ZHAO

摘要:

通过实验的方式研究旋流室顶部具有螺旋形导流结构的空心喷嘴。搭建可容纳1~4个喷嘴工作的喷淋实验台,制作可视化螺旋喷嘴,进行喷淋特性实验。使用高速摄像机进行内部流场特性的可视化研究,并通过测量装置采集外部流场喷淋密度的分布情况。分析不同工况下内部流场空气柱、湍流流动的变化规律以及外部流场喷淋密度的特性。结果表明,在内外压差的作用下,喷嘴内部形成空气柱,由于单侧切向入口和螺旋导流结构的作用,空气柱中心线与旋流室中心线存在偏移。外部流场周向有效喷淋密度呈现双峰值分布,峰值区域分别位于120°和280°附近。

关键词: 实验验证, 螺旋喷嘴, 气液两相流, 湍流, 结构参数, 均匀性

Abstract:

The hollow nozzle with a spiral flow guide structure on the top of the swirl chamber was studied experimentally. A spray test bench capable of accommodating 1—4 nozzles is set up, and a visual spiral nozzle is manufactured for spray characteristic experiments. High-speed cameras are employed for visualizing the internal flow field characteristics, and the distribution of external flow field spray density is collected through measurement devices. The variations of internal flow field air columns and turbulent flow under different operating conditions, as well as the characteristics of external flow field spray density, are analyzed. The results show that under the influence of internal and external pressure differences, an air column forms inside the nozzle, and due to the effects of the single-side tangential inlet and the spiral guiding structure, the centerline of the air column is offset from the centerline of the swirl chamber. The circumferential effective spray density of the external flow field presents a double-peak distribution, with the peak areas located near 120° and 280° respectively.

Key words: experimental verification, spiral nozzle, gas-liquid two-phase flow, turbulence, structural parameters, homogeneity

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