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Piezoelectric diffuser/nozzle micropump with double pump chambers

WANG Wei, ZHANG Ying, TIAN Li, CHEN Xiaojie, LIU Xiaowei

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 449-453 doi: 10.1007/s11465-008-0076-4

Abstract: To eliminate check valve fatigue and valve clogging, diffuser/nozzle elements are used for flow rectificationin a valveless diffuser/nozzle micropump instead of valves.In this paper, a diffuser/nozzle Si/Glass micropump with two pump chambers by IC and MEMS technologyPump-chambers and diffuser elements are fabricated by the anisotropic KOH-etch technique on the siliconeThe driving force of the micropump is produced by the PZT piezoelectric actuator.

Keywords： diffuser/nozzle Si/Glass     phenomenon     rectification     diffuser/nozzle micropump     frequency    

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Experimental and CFD analysis of nozzle position of subsonic ejector

Xilai ZHANG, Shiping JIN, Suyi HUANG, Guoqing TIAN

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 167-174 doi: 10.1007/s11708-009-0001-5

Abstract: The influence of nozzle position on the performance of an ejector was analyzed qualitatively with freeExperimental investigations and computational fluid dynamics (CFD) analysis of the nozzle position ofThe results show that there is an optimum nozzle position for the ejector.The ejecting coefficient reaches its maximum when the nozzle is positioned at the optimum and decreasesMoreover, the nozzle position of an ejector is not a fixed value, but is influenced greatly by the flow

Keywords： ejector     nozzle position     ejecting coefficient     CFD    

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Depth of cut models for multipass abrasive waterjet cutting of alumina ceramics with nozzle oscillation

Jun WANG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 19-32 doi: 10.1007/s11465-009-0082-1

Abstract: of the depth of cut in multipass abrasive waterjet (AWJ) cutting of alumina ceramics with controlled nozzlesignificantly increase the depth of cut by an average of 50.8% as compared to single pass cutting without nozzle

Keywords： abrasive waterjet     engineering ceramics     depth of cut     cutting performance     nozzle oscillation     machining    

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Investigation into the influence of diffuser stagger angles on the flow field and performance of a centrifugal

XI Guang, DING Haiping, YUAN Minjian, ZHANG Chunmei, ZHOU Li

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 290-294 doi: 10.1007/s11708-007-0041-7

Abstract: The performance graphs of a centrifugal compressor under different diffuser stagger angles were measuredThe results show that the performance graph shifts when the diffuser stagger angle is altered; the influenceLarge scale vortices appear on the diffuser vane under larger incidence.An optimal diffuser stagger angle should exist at a specified flow rate to make the characteristic of

Keywords： diffuser stagger     incidence     different stagger     flow     centrifugal compressor    

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Influence of nozzle height to width ratio on ignition and NO

Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 431-448 doi: 10.1007/s11708-021-0726-3

Abstract: (PF) of semicoke (SC), large-scale experiments were conducted in a 300 kW fired furnace at various nozzlesettings, i.e., ratios (denoted by / ) of the height of the rectangular burner nozzle to its widththe flame stability, ignition performance, and fuel burnout ratio were significantly improved at a nozzleThe results suggested that in a test furnace, regulating the nozzle / conditions sharply reduces NO

Keywords： rectangular jet burner     nozzle height to width ratio     ignition characteristics     pyrolyzed semicoke (SC)    

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Numerical analysis of rotating stall characteristics in vaneless diffuser with large width-radius ratio

GAO Chuang, GU Chuangang, WANG Tong, DAI Zhengyuan

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 457-460 doi: 10.1007/s11708-008-0071-9

Abstract: neglected and inlet jet-wake velocity patterns are prescribed, was applied to simulate one vaneless diffuserThe impact of diffuser length, impeller blade number, etc. on the rotating stall was analyzed.

Keywords： Comparison     Computational     two-dimensional     influence     different mechanism    

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Multi-objective optimization of a 3D vaneless diffuser based on fuzzy theory

GAO Chuang, GU Chuangang, WANG Tong, SHU Xinwei

Frontiers in Energy 2008, Volume 2, Issue 1,   Pages 66-70 doi: 10.1007/s11708-008-0006-5

Abstract: An optimization model based on fuzzy theory was set up and the corresponding Interactive modified simplex (IMS) method was developed to solve it. Both static pressure recovery and total pressure loss were considered in the model. Computational fluid dynamics (CFD) method was applied to solve the Reynolds-Averaged Navier-Stokes equation (RANS) and to find flow field distribution to get the value of the object function. After receiving the new shroud curve, grid movement and redrawing technology were adopted to avoid grid-line crossing and negative cells. The shroud curve was fitted with B-spline. The optimized results concur with the results reported in references.

Keywords： Computational     pressure recovery     B-spline     technology     corresponding Interactive    

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Flow behavior of liquid-solid coupled system of piezoelectric micropump

LU Lijun, WU Jiankang

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 50-54 doi: 10.1007/s11465-008-0003-8

Abstract: paper employs a shallow water model and the finite element method to approximate periodical flows of a micropumpA liquid-solid coupled system equation of the micropump is presented.Based on the thickness-averaged flow equation, the periodical flow of the micropump is studied usingNumerical results indicate that an optimal working frequency can be obtained, at which the flow rate of the micropump

Keywords： amplitude-frequency relationship     first-order     micropump     diaphragm vibration     electric    

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Insult of gastroesophageal reflux on airway: clinical significance of pharyngeal nozzle

Zhonggao Wang,Zhiwei Hu,Jimin Wu,Feng Ji,Hongtao Wang,Yungang Lai,Xiang Gao,Yachan Ning,Chengchao Zhang,Zhitong Li,Weitao Liang,Jianjun Liu

Frontiers of Medicine 2015, Volume 9, Issue 1,   Pages 117-122 doi: 10.1007/s11684-014-0343-1

Abstract: passes the esophagus and then the distal pharynx, where it appears a beak like stricture, serving as a nozzle

Keywords： gastroesophageal reflux     airway     pharyngeal nozzle     micro-aspiration     asthma    

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A new approach for fuel injection into a solar receiver/reactor: Numerical and experimental investigation

M Helal Uddin, Nesrin Ozalp, Jens Heylen, Cedric Ophoff

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 683-696 doi: 10.1007/s11705-018-1782-z

Abstract: This study presents a new jet-type burner nozzle for gaseous feedstock injection into a cavity solarThe nozzle design was adapted from a combustion burner and successfully implemented into a solar receiverand studied the influence of the nozzle design on the fluid mixing and temperature distribution insideThe CFD results showed a variation of the gas flow pattern and gas mixing after the burner nozzle adaptation

Keywords： solar reactor     nozzle     CFD     heat transfer     mixing and recirculation    

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A General Strategy for Efficiently Constructing Multifunctional Cluster Fillers Using a Three-Fluid Nozzle Article

Dan-Lei Yang, Dan Wang, Hao Niu, Rui-Li Wang, Mei Liu, Fei-Min Zhang, Jie-Xin Wang, Mei-Fang Zhu

Engineering 2022, Volume 8, Issue 1,   Pages 138-147 doi: 10.1016/j.eng.2021.08.001

Abstract: In this work, a spray dryer with a three-fluid nozzle was applied for the first time to construct high-performanceThe application of a three-fluid nozzle can effectively avoid the aggregation of different nanoparticles/sub> binary system, the SiO2–ZrO2 CNCs constructed using a three-fluid nozzleintroduction of ZrO2 nanoparticles, whereas their counterparts constructed using a two-fluid nozzleThus, the three-fluid nozzle spray drying technique holds great potential for the efficient construction

Keywords： Multifunctional cluster fillers     Three-fluid nozzle spray drying     Mechanical properties     Antibacterial activity    

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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

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 4,   Pages 442-454 doi: 10.15302/J-FASE-2017169

Abstract: The measurement distance (0.15, 0.25 and 0.35 m) from the nozzle orifice was found to be important for

Keywords： air induction nozzle     wind tunnel     aerial spray     droplet size spectra    

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Characterization of aerodynamic performance of wind-lens turbine using high-fidelity CFD simulations

Islam HASHEM, Aida A. HAFIZ, Mohamed H. MOHAMED

Frontiers in Energy 2022, Volume 16, Issue 4,   Pages 661-682 doi: 10.1007/s11708-020-0713-0

Abstract: The wind-lens typically comprises a diffuser shroud coupled with a flange appended to the exit peripherywind through the turbine rotor owing to the creation of a low-pressure zone downstream the flanged diffuserthe effect of change of some design parameters such as length, area ratio and flange height of the diffuser

Keywords： shroud     diffuser-augmented wind turbine (DAWT)     Betz limit     aerodynamics     computational fluid dynamics (CFD    

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Title Author Date Type Operation

Piezoelectric diffuser/nozzle micropump with double pump chambers

WANG Wei, ZHANG Ying, TIAN Li, CHEN Xiaojie, LIU Xiaowei

Journal Article

Experimental and CFD analysis of nozzle position of subsonic ejector

Xilai ZHANG, Shiping JIN, Suyi HUANG, Guoqing TIAN

Journal Article

Depth of cut models for multipass abrasive waterjet cutting of alumina ceramics with nozzle oscillation

Jun WANG

Journal Article

Investigation into the influence of diffuser stagger angles on the flow field and performance of a centrifugal

XI Guang, DING Haiping, YUAN Minjian, ZHANG Chunmei, ZHOU Li

Journal Article

Influence of nozzle height to width ratio on ignition and NO

Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU

Journal Article

Numerical analysis of rotating stall characteristics in vaneless diffuser with large width-radius ratio

GAO Chuang, GU Chuangang, WANG Tong, DAI Zhengyuan

Journal Article

Multi-objective optimization of a 3D vaneless diffuser based on fuzzy theory

GAO Chuang, GU Chuangang, WANG Tong, SHU Xinwei

Journal Article

Flow behavior of liquid-solid coupled system of piezoelectric micropump

LU Lijun, WU Jiankang

Journal Article

Insult of gastroesophageal reflux on airway: clinical significance of pharyngeal nozzle

Zhonggao Wang,Zhiwei Hu,Jimin Wu,Feng Ji,Hongtao Wang,Yungang Lai,Xiang Gao,Yachan Ning,Chengchao Zhang,Zhitong Li,Weitao Liang,Jianjun Liu

Journal Article

A new approach for fuel injection into a solar receiver/reactor: Numerical and experimental investigation

M Helal Uddin, Nesrin Ozalp, Jens Heylen, Cedric Ophoff

Journal Article

A General Strategy for Efficiently Constructing Multifunctional Cluster Fillers Using a Three-Fluid Nozzle

Dan-Lei Yang, Dan Wang, Hao Niu, Rui-Li Wang, Mei Liu, Fei-Min Zhang, Jie-Xin Wang, Mei-Fang Zhu

Journal Article

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

Journal Article

Characterization of aerodynamic performance of wind-lens turbine using high-fidelity CFD simulations

Islam HASHEM, Aida A. HAFIZ, Mohamed H. MOHAMED

Journal Article