流动聚焦/模糊喷嘴流动形态及流动模式研究

周高伟; 阎凯; 李峰

doi:10.3969/j.issn.1001-2222.2022.03.004

车用发动机 ›› 2022, Vol. 0 ›› Issue (3) : 23-31. DOI: 10.3969/j.issn.1001-2222.2022.03.004

栏目

流动聚焦/模糊喷嘴流动形态及流动模式研究

周高伟¹，阎凯²，李峰²

作者信息 +

Flow Morphology and Mode inside Flow Focusing/Blurring Nozzle

ZHOU Gaowei¹,YAN Kai²,LI Feng²

Author information +

文章历史 +

摘要

建立了流动聚焦/模糊喷嘴试验平台以及内部气液流动数值模型，在常温下对喷嘴内部气液流动形态及流动模式进行了研究。研究结果表明：流动聚焦/模糊喷嘴内部存在流动聚焦、流动过渡和流动模糊3种流动模式；不同工况时，流动聚焦/模糊喷嘴内部气液流动形态及流动模式的转变与喷嘴内部的气液相互作用以及气液流动漩涡有关。在本试验选择的气相流量10~100 L/min、液相流量0.1~1 L/min、管孔距1~5 mm、喷孔直径3~7 mm和喷孔长度5~15 mm范围内，流动聚焦模式主要出现在液相流量和气相流量较小工况，流动模糊模式主要出现在液相流量较小而气相流量较大工况；喷嘴管孔距和喷孔直径的增加均不利于喷嘴内部流动模糊模式的出现，喷孔长度的增加虽然有利于喷嘴内部流动模糊模式的出现，但影响相对较小。

Abstract

The experimental platform of flow focusing/blurring nozzle and the numerical model of internal gas-liquid flow were established, and the gas-liquid flow morphology and mode inside the nozzle were studied at room temperature. The results show that the flow focusing, transition and blurring modes exist in the flow focusing/blurring nozzle. Under different working conditions, the changes of gas-liquid flow morphology and flow mode are related to the gas-liquid interaction and flow vortex inside the nozzle. In this experiment, the flow rate of gas phase is 10-100 L/min, the flow rate of liquid phase is 0.1-1 L/min, the distance between pipe holes is 1-5 mm, the diameter of nozzle holes is 3-7 mm, and the length of nozzle holes is 5-15 mm. According to the experiment, the flow focusing mode mainly occurs under the conditions of small liquid and gas flow rate, and the flow blurring mode mainly occurs under the conditions of small liquid flow rate and large gas flow rate. The increase of distance between pipe holes and nozzle hole diameter is not conducive to the flow blurring mode inside the nozzle. Although the increase of nozzle hole length is conducive to the flow blurring mode, the effect is relatively little.

导出引用

周高伟，阎凯，李峰. 流动聚焦/模糊喷嘴流动形态及流动模式研究[J]. 车用发动机. 2022, 0(3): 23-31 https://doi.org/10.3969/j.issn.1001-2222.2022.03.004

ZHOU Gaowei,YAN Kai,LI Feng. Flow Morphology and Mode inside Flow Focusing/Blurring Nozzle[J]. Vehicle Engine. 2022, 0(3): 23-31 https://doi.org/10.3969/j.issn.1001-2222.2022.03.004