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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
Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN
《农业科学与工程前沿(英文)》 2018年 第5卷 第4期 页码 455-461 doi: 10.15302/J-FASE-2018232
Prewetting process can reduce the contact angle between the droplet and the leaf blade, so that the droplet can more easily wet and spread, thereby increasing the quantity of deposition. To improve the effectiveness of pesticides on cotton leaves, prewetting by single-rotor electric unmanned aerial vehicles (UAV) was studied, focusing on the effects of pesticide deposition on cotton leaves during the flowering period. Cotton leaves in 0°–30°, 30°–60°, 60°–90° leaf blade angle ranges (angle between the leaf blade and the horizontal plane) were examined. In the first experiment, four different prewetting volumes (0, 1.6, 3.2 and 4.8 L) were sprayed by a single-rotor electric UAV on four cotton plots (plots A to D) each with an area of 120 m , and then each area was sprayed with a 0.8% (w/v) ponceau 2R solution by another single-rotor electric UAV. The results revealed that with no prewetting, droplet deposition quantity decreased with increasing leaf blade inclination. After prewetting, the mean droplet deposition quantity on plots B, C and D increased by 39.8%, 9.7% and 24.9%, respectively. The prewetting rate of 1.6 L per 120 m had the most significant effect on improving the deposition of droplets. It was also found that the mean droplet deposition quantity in each leaf blade angle range increased after prewetting. For the leaf blade angle range 60° to 90°, this increase was the most pronounced, with 0.043, 0.062, 0.057 and 0.048 L·cm in plots A–D, respectively. Also, droplet deposition uniformity in the leaf blade angle range 60°–90° was better after prewetting. These results should provide a valuable reference for future research and practice to improve the effectiveness of pesticides applied to cotton by aerial applications.
关键词: aerial spray cotton deposition flowering period leaf angle prewetting UAV
燃油喷雾形态主动控制的可能性 Review
Masataka Arai
《工程(英文)》 2019年 第5卷 第3期 页码 519-534 doi: 10.1016/j.eng.2019.04.010
内燃机(ICE)对于汽车是有吸引力的动力源,具有良好的可储存性、可运输性,同时需要供应高能量密度的液体燃料。具有高性能和低环境危害的紧凑型内燃机是内燃机发展趋势。未来必须把燃油喷雾智能主动控制的燃烧作为解决传统内燃机相关重大问题(如排放)的突破性技术。已发展出在喷雾期间形成预期的燃料喷射速率和喷射模式的技术,并且传统内燃机可以在一定程度上控制燃烧。但是在燃烧范围内,燃料在空间上的扩散并未取得预期进展。因此,对于燃烧的智能控制,新且有效的燃油喷雾主动控制技术是非常必要的。空化、闪蒸、喷雾- 喷雾相互作用、喷雾-壁面相互作用和空气流动是有可能实现燃油喷雾形态主动控制的基础。本文使用文献中的论据来讨论未来喷雾燃烧的智能紧凑内燃机中喷雾形态主动控制技术的可能性。
ZHAO Zhiguo, XIE Maozhao
《能源前沿(英文)》 2008年 第2卷 第1期 页码 59-65 doi: 10.1007/s11708-008-0022-5
W. Widiyastuti, Adhi Setiawan, Sugeng Winardi, Tantular Nurtono, Heru Setyawan
《化学科学与工程前沿(英文)》 2014年 第8卷 第1期 页码 104-113 doi: 10.1007/s11705-014-1406-1
关键词: droplet hydroxyapatite particle CFD tubular furnace spray pyrolysis
Flexible micro flow sensor for micro aerial vehicles
Rong ZHU, Ruiyi QUE, Peng LIU
《机械工程前沿(英文)》 2017年 第12卷 第4期 页码 539-545 doi: 10.1007/s11465-017-0427-0
This article summarizes our studies on micro flow sensors fabricated on a flexible polyimide circuit board by a low-cost hybrid process of thin-film deposition and circuit printing. The micro flow sensor has merits of flexibility, structural simplicity, easy integrability with circuits, and good sensing performance. The sensor, which adheres to an object surface, can detect the surface flow around the object. In our study, we install the fabricated micro flow sensors on micro aerial vehicles (MAVs) to detect the surface flow variation around the aircraft wing and deduce the aerodynamic parameters of the MAVs in flight. Wind tunnel experiments using the sensors integrated with the MAVs are also conducted.
关键词: micro flow sensor flexible sensor surface flow sensing aerodynamic parameter micro aerial vehicle (MAV)
《能源前沿(英文)》 doi: 10.1007/s11708-023-0901-9
关键词: interconnector coating plasma spray electrochemical performance Cr diffusion inhibition solid oxide cells (SOCs)
Minghou LIU, Yaqing WANG, Dong LIU, Kan XU, Yiliang CHEN
《能源前沿(英文)》 2011年 第5卷 第1期 页码 75-82 doi: 10.1007/s11708-010-0014-0
Dynamic Target Tracking of Unmanned Aerial Vehicles Under Unpredictable Disturbances
Yanjie Chen,Yangning Wu,Limin Lan,Hang Zhong,Zhiqiang Miao,Hui Zhang,Yaonan Wang,
《工程(英文)》 doi: 10.1016/j.eng.2023.05.017
关键词: Unmanned aerial vehicle Visual servoing Velocity observer Target tracking
Ahmad Kalbasi Ashtari, Amir M. Samani Majd, Gerald L. Riskowski, Saqib Mukhtar, Lingying Zhao
《环境科学与工程前沿(英文)》 2016年 第10卷 第6期 doi: 10.1007/s11783-016-0869-3
关键词: Ammonia Spray wet scrubber Slightly acidic scrubbing solution Controlled pH Removal efficiency
Impingement of hollow cone spray on hot porous medium
ZHAO Zhiguo, XIE Maozhao
《能源前沿(英文)》 2008年 第2卷 第3期 页码 273-278 doi: 10.1007/s11708-008-0048-8
A study of spray granulation in vibrated fluidized bed with internal heating tubes
Xiaoheng PAN, Shichao YE, Zeguang ZHANG, Li ZHANG, Xuejun ZHU
《化学科学与工程前沿(英文)》 2009年 第3卷 第1期 页码 78-82 doi: 10.1007/s11705-009-0084-x
关键词: vibrated fluidized bed immersed horizontal horizontal heating tubes spray granulation particle growth model
An experimental study on spray auto-ignition of RP-3 jet fuel and its surrogates
Yaozong DUAN, Wang LIU, Zhen HUANG, Dong HAN
《能源前沿(英文)》 2021年 第15卷 第2期 页码 396-404 doi: 10.1007/s11708-020-0715-y
关键词: RP-3 jet fuel surrogate spray auto-ignition constant volume combustion chamber
Kinetic studies of xylan hydrolysis of corn stover in a dilute acid cycle spray flow-through reactor
Hongman ZHANG, Qiang JIN, Rui XU, Lishi YAN, Zengxiang LIN
《化学科学与工程前沿(英文)》 2011年 第5卷 第2期 页码 252-257 doi: 10.1007/s11705-010-1010-y
关键词: corn stover xylan hydrolysis biphasic model Saeman model cycle spray kinetics
Investigations on multicycle spray detonations
LI Mu, YAN Chuanjun, ZHENG Longxi, WANG Zhiwu, QIU Hua
《能源前沿(英文)》 2007年 第1卷 第2期 页码 207-212 doi: 10.1007/s00000-007-0027-5
关键词: multicycle deflagration-to-detonation transition pressure transducer compression piezoelectricity pressure
标题 作者 时间 类型 操作
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
期刊论文
Effect of UAV prewetting application during the flowering period of cotton on pesticide droplet deposition
Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN
期刊论文
Numerical investigation of the effects of fuel spray type on the interaction of fuel spray and hot porous
ZHAO Zhiguo, XIE Maozhao
期刊论文
Particle formation of hydroxyapatite precursor containing two components in a spray pyrolysis process
W. Widiyastuti, Adhi Setiawan, Sugeng Winardi, Tantular Nurtono, Heru Setyawan
期刊论文
Plasma spray coating on interconnector toward promoted solid oxide fuel cells and solid oxide electrolysis
期刊论文
Experimental study of the effects of structured surface geometry on water spray cooling performance in
Minghou LIU, Yaqing WANG, Dong LIU, Kan XU, Yiliang CHEN
期刊论文
Dynamic Target Tracking of Unmanned Aerial Vehicles Under Unpredictable Disturbances
Yanjie Chen,Yangning Wu,Limin Lan,Hang Zhong,Zhiqiang Miao,Hui Zhang,Yaonan Wang,
期刊论文
Removing ammonia from air with a constant pH, slightly acidic water spray wet scrubber using recycled
Ahmad Kalbasi Ashtari, Amir M. Samani Majd, Gerald L. Riskowski, Saqib Mukhtar, Lingying Zhao
期刊论文
A study of spray granulation in vibrated fluidized bed with internal heating tubes
Xiaoheng PAN, Shichao YE, Zeguang ZHANG, Li ZHANG, Xuejun ZHU
期刊论文
An experimental study on spray auto-ignition of RP-3 jet fuel and its surrogates
Yaozong DUAN, Wang LIU, Zhen HUANG, Dong HAN
期刊论文
Kinetic studies of xylan hydrolysis of corn stover in a dilute acid cycle spray flow-through reactor
Hongman ZHANG, Qiang JIN, Rui XU, Lishi YAN, Zengxiang LIN
期刊论文