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Insult of gastroesophageal reflux on airway: clinical significance of pharyngeal nozzle
null
《医学前沿(英文)》 2015年 第9卷 第1期 页码 117-122 doi: 10.1007/s11684-014-0343-1
At the very time of global paying the highest attention to the worst insults of smoking as well as haze on the airway, everybody knows both are exogenous and noticeable. However, people mostly, including many medical personnel, do not know how badly the gastroesophageal reflux (GER) insults on our own airway. Symptoms of GER are commonly seen as heartburn and regurgitation, which can be mostly tolerated. However, when the up going gastric content reversely passes the esophagus and then the distal pharynx, where it appears a beak like stricture, serving as a nozzle, so as to produce numerous micro-particles and reach the oro-nasal cavity and also the airway causing allergic rhinitis and asthmatic attacks, even pulmonary parenchyma lesions. It will reduce life quality or even jeopardize life. The point that the endogenous insult appears in the respiratory system, but originates from the digestive tract is not well known and often undiagnosed and not correctly treated. The GER induced airway challenge is a treatable and preventive entity, as soon as a diagnosis is made, a good relief could be expected by means of life style adjustment, medicine, or fixation of the patulous cardia through radiofrequency or fundoplication. The author Dr. Zhonggao Wang had suffered it for long and symptoms disappeared for 8 years after anti-reflux surgery. Here is a presentation of Dr. Zhonggao Wang and his team’s work and would call attention to the public so as to recognize this relatively unknown entity — a treatable condition occurring from human itself, but not from outside surroundings as smoking or haze does.
关键词: gastroesophageal reflux airway pharyngeal nozzle micro-aspiration asthma
Piezoelectric diffuser/nozzle micropump with double pump chambers
WANG Wei, ZHANG Ying, TIAN Li, CHEN Xiaojie, LIU Xiaowei
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 449-453 doi: 10.1007/s11465-008-0076-4
关键词: diffuser/nozzle Si/Glass phenomenon rectification diffuser/nozzle micropump frequency
Experimental and CFD analysis of nozzle position of subsonic ejector
Xilai ZHANG, Shiping JIN, Suyi HUANG, Guoqing TIAN
《能源前沿(英文)》 2009年 第3卷 第2期 页码 167-174 doi: 10.1007/s11708-009-0001-5
Jun WANG
《机械工程前沿(英文)》 2010年 第5卷 第1期 页码 19-32 doi: 10.1007/s11465-009-0082-1
关键词: abrasive waterjet engineering ceramics depth of cut cutting performance nozzle oscillation machining
Influence of nozzle height to width ratio on ignition and NO
Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU
《能源前沿(英文)》 2021年 第15卷 第2期 页码 431-448 doi: 10.1007/s11708-021-0726-3
关键词: rectangular jet burner nozzle height to width ratio ignition characteristics pyrolyzed semicoke (SC) and bituminous blend NOx formation
M Helal Uddin, Nesrin Ozalp, Jens Heylen, Cedric Ophoff
《化学科学与工程前沿(英文)》 2018年 第12卷 第4期 页码 683-696 doi: 10.1007/s11705-018-1782-z
An innovative and efficient design of solar receivers/reactors can enhance the production of clean fuels via concentrated solar energy. This study presents a new jet-type burner nozzle for gaseous feedstock injection into a cavity solar receiver inspired from the combustion technology. The nozzle design was adapted from a combustion burner and successfully implemented into a solar receiver and studied the influence of the nozzle design on the fluid mixing and temperature distribution inside the solar receiver using a 7 kW solar simulator and nitrogen as working fluid. Finally, a thorough computational fluid dynamics (CFD) analysis was performed and validated against the experimental results. The CFD results showed a variation of the gas flow pattern and gas mixing after the burner nozzle adaptation, which resulted an intense effect on the heat transfer inside the solar receiver.
关键词: solar reactor nozzle CFD heat transfer mixing and recirculation
一种采用三流体喷嘴喷雾干燥技术高效构筑齿科修复用多功能团簇体填料的通用策略 Article
杨丹蕾, 王丹, 牛昊, 王瑞莉, 刘梅, 章非敏, 王洁欣, 朱美芳
《工程(英文)》 2022年 第8卷 第1期 页码 138-147 doi: 10.1016/j.eng.2021.08.001
齿科复合树脂对多功能填料有很高的要求。本研究首次采用配备三流体喷嘴的喷雾干燥设备构筑由不同功能纳米颗粒组成的高性能复合纳米颗粒团簇体,并将其作为填料应用于齿科修复。三流体喷嘴的应用可以有效避免喷雾干燥前需将带有相反电荷的纳米粒子混合而发生的团聚现象,从而构筑形貌规则的复合纳米颗粒团簇体填料。对于SiO2-ZrO2二元体系,尽管引入了ZrO2纳米颗粒,采用三流体喷嘴构筑的SiO2-ZrO2复合团簇体可以使复合树脂保持优异的力学性能[弯曲强度、弯曲模量、压缩强度和硬度分别为(133.3 ± 4.7) MPa、(8.8 ± 0.5) GPa、(371.1 ± 13.3) MPa和(64.5 ± 0.7) HV],但使用二流体喷嘴构筑的SiO2-ZrO2复合团簇体填充所得复合树脂的力学性能显著下降。此外,对SiO2-ZrO2复合团簇体填料进行热处理后再进行填充,能够显著提高复合树脂的力学性能和X射线阻射性。含有10 wt.%以上ZrO2纳米颗粒的复合树脂可以满足其对X射线阻射性的要求。更重要的是,该方法可以推广到三元或四元体系。填充了SiO2-ZrO2-ZnO 复合团簇体填料(三者质量比为56∶10∶4)的复合树脂,除了具有良好的力学性能和X射线阻射性外,还展现出高的抗菌活性(抗菌率> 99%)。因此,采用三流体喷嘴的喷雾干燥技术在高效构筑多功能团簇体填料方面具有巨大的潜力。
Droplet spectra and high-speed wind tunnel evaluation of air induction nozzles
Qing TANG, Liping CHEN, Ruirui ZHANG, Min XU, Gang XU, Tongchuan YI, Bin ZHANG
《农业科学与工程前沿(英文)》 2018年 第5卷 第4期 页码 442-454 doi: 10.15302/J-FASE-2017169
A series of air induction nozzles were tested in a high-speed wind tunnel. Droplet size spectra were measured for four air induction nozzles (IDK-120-01, IDK-120-02, IDK-120-03 and IDK-120-04) each at three spray pressures (0.3, 0.4 and 0.5 MPa) and seven different air velocities (121.7, 153.4, 185.5, 218.4, 253.5, 277.5 and 305.5 km·h ). The measurement distance (0.15, 0.25 and 0.35 m) from the nozzle orifice was found to be important for the atomization of the droplets. The response surface method was used to analyze the experimental data. The results indicated that v and v of the droplets decreased quasi-linearly with increased wind speed, while v was affected by the quadratic of wind speed. v , v and v of the droplets were all proportional to the orifice size, and were not markedly influenced by the spray pressure. The percentage of the spray volume consisting of droplets with a diameter below 100 mm (%<100 mm) was found to be quadratically related to wind speed, and was not markedly influenced by the spray pressure and orifice size. However, the effect of the orifice size on the %<200 mm could not be ignored.
关键词: air induction nozzle wind tunnel aerial spray droplet size spectra
标题 作者 时间 类型 操作
Piezoelectric diffuser/nozzle micropump with double pump chambers
WANG Wei, ZHANG Ying, TIAN Li, CHEN Xiaojie, LIU Xiaowei
期刊论文
Experimental and CFD analysis of nozzle position of subsonic ejector
Xilai ZHANG, Shiping JIN, Suyi HUANG, Guoqing TIAN
期刊论文
Depth of cut models for multipass abrasive waterjet cutting of alumina ceramics with nozzle oscillation
Jun WANG
期刊论文
Influence of nozzle height to width ratio on ignition and NO
Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU
期刊论文
A new approach for fuel injection into a solar receiver/reactor: Numerical and experimental investigation
M Helal Uddin, Nesrin Ozalp, Jens Heylen, Cedric Ophoff
期刊论文