Sensitivity of Atomization Characteristic to Operation Conditions for Air-assisted Atomizers in Snow-makers
Sensitivity of Atomization Characteristic to Operation Conditions for Air-assisted Atomizers in Snow-makers
复制标题
造雪机空气辅助雾化器雾化特性对运行条件的敏感性
DOI：
10.1016/j.ijrefrig.2022.12.016
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发表时间：
2022-12
影响因子：
3.9
通讯作者：
Haifeng Wu
中科院分区：
文献类型：
--
作者：
Ruixiang Wang;Bowen Zhang;Rongji Xu;Meibo Xing;Hongjun Zhang;Hua Zhang;Gang Yan;Haifeng Wu
空气辅助雾化器在室外造雪机中起着生成核和促进非均匀成核的关键作用。造雪机工作条件的变化导致风送雾化器的雾化特性发生显著变化，直接影响雾化器的成核效果和造雪效率。本文研究了造雪机空气雾化喷嘴雾化特性对工况的敏感性。为此目的，设计、构造和测试透明装置。为了寻找适合室外造雪机的混合方式，介绍了水-气混合过程，比较了两种不同混合方式的气辅雾化器的雾化特性。结果表明，随着气水压力比的增大，喷雾锥角先增大后福尔斯减小，索特平均直径（SMD）单调减小。气水压力比的不平衡会导致雾化的堵塞现象，从而导致雾化的失败。在空气辅助雾化器内部，依次存在四种稳定的混合模式，即，全水、搅流、环流、全气。随着混合方式的变化，水与空气之间的相互作用发生变化，从而导致不同工况下的雾化特性不同。另一个有趣的发现是，具有空气和水独立喷射的混合模式的雾化器在避免阻塞情况和提高质量流量方面具有显著更好的性能，这可以是户外造雪机的更好选择。
Air-assisted atomizers play a crucial role in generating nuclei and promoting heterogeneous nucleation in outdoor snow-makers. The change of operation conditions for snow-makers leads to a marked variation of atomization characteristic of air-assisted atomizers, which directly influences the nuclei generating and snow-making efficiency. This paper investigates the sensitivity of air-assisted atomizers’ atomization characteristic to operation conditions in snow-makers. For this purpose, a transparent device is designed, structured and tested. The water-air mixing process was presented, and the atomization behaviors of two air-assisted atomizers with different mixing modes were compared in order to find an appropriate mixing mode for outdoor snow-makers. Results show that the spray cone angle first goes up and then falls down with the increase of air-water pressure ratio, while Sauter mean diameter (SMD) decreases monotonically. The unbalanced air-water pressure ratio results in the failure of atomization because of the choking phenomenon. Inside the air-assisted atomizers, there are four stable mixing patterns in sequence, i.e., full water, churning flow, annular flow and full air. With the variation of the mixing pattern, the interaction between water and air changes, which causes different atomization characteristics under different operation conditions. Another interesting finding is that the atomizers with the mixing mode in which air and water are injected independently have remarkably better performance in avoiding choking situation and improving mass flow rate, which can be a better choice for outdoor snow-makers.
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DOI：
10.1016/s0140-7007(02)00021-x
发表时间：
2003
期刊：
International Journal of Refrigeration-revue Internationale Du Froid
影响因子：
--
作者：
M. Strub;O. Jabbour;F. Strub;J. Bédécarrats
通讯作者：
M. Strub;O. Jabbour;F. Strub;J. Bédécarrats
影响因子：
11.2
作者：
Li, Xing;Chen, Ying;Liu, Zhuowei
通讯作者：
Liu, Zhuowei
影响因子：
9
作者：
Genbao Li;Chuqiao Li
通讯作者：
Genbao Li;Chuqiao Li
影响因子：
3.2
作者：
MOFFAT, RJ
通讯作者：
MOFFAT, RJ
影响因子：
3.2
作者：
Liejin Guo;Guang-Jun Li;Bin Chen;Xuejun Chen;D. Papailiou;T. Panidis
通讯作者：
Liejin Guo;Guang-Jun Li;Bin Chen;Xuejun Chen;D. Papailiou;T. Panidis