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Relevant bibliographies by topics / Micronozzles

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Academic literature on the topic 'Micronozzles'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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Journal articles on the topic "Micronozzles"

1

Cheah, Kean How, and Jit Kai Chin. "DESIGN AND FABRICATION OF MICRONOZZLES." IIUM Engineering Journal 12, no. 1 (2011): 51–62. http://dx.doi.org/10.31436/iiumej.v12i1.65.

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Micronozzle, a key component in micropropulsion system, has been designed and fabricated. Quasi 1D inviscid theory was used in designing a series of conical micronozzles of different expander half-angles (10Â°-50Â°). Aerospike micronozzle, a promising candidate to achieve high performance propulsion system, was designed with Angelino method (or Approximate method). Both micronozzles were fabricated using soft lithography, an inexpensive and relatively simple technique comparing to well-established deep reactive ion etching (DRIE) technique, with polydimethylsiloxane (PDMS) as structural materi

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2

Haris, P. A., and T. Ramesh. "Numerical Simulation of Superheated Steam Flow in a Micronozzle." Applied Mechanics and Materials 592-594 (July 2014): 1677–81. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.1677.

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Methods for creating thrusters with very low thrust using micronozzles have been actively developed recently. The propellant flow in such micronozzles are pressure driven and are characterized by low Reynolds number. Hence, the flow is always in laminar regime with high viscous losses. Proper design by effectively studying the flow behavior of propellant inside micronozzle is highly essential to minimize the losses. The geometry of the micronozzle is a key factor that affects the performance of the thruster. In this paper numerical examinations of the flow of superheated steam inside a 3D pyra

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Gerasimov*, A. P., A. V. Krasavin, and I. A. Bykov. "Micronozzle Comparator for Calibration (Verification) of Critical Micronozzles." Measurement Techniques 57, no. 3 (2014): 294–99. http://dx.doi.org/10.1007/s11018-014-0448-6.

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Li, Xiao Ping, Wei Zheng Yuan, Qiang Shen, Jian Bing Xie, and Hong Long Chang. "Interaction Effects of Micronozzle Geometric Parameters on Propulsion Performance." Key Engineering Materials 609-610 (April 2014): 734–39. http://dx.doi.org/10.4028/www.scientific.net/kem.609-610.734.

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This paper reports an effective design method for optimizing the geometric parameters of a micronozzle. Numerical analysis is conducted to predict the propulsion performance of micronozzles. By means of design of experiment (DOE), the number of numerical experiments is reduced dramatically from 1024 to 16. The interaction effects of the geometric parameters are taken into consideration for the first time. The results indicate that the interaction effects of geometric parameters cannot be neglected in choosing the optimal parameters for a practical design.

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Gubanov, D. A., S. G. Kundasev, and L. P. Trubitsyna. "Influence of Different Configurations of Microjet Injection on Structure and Acoustic Radiation of Supersonic Jet." Siberian Journal of Physics 14, no. 2 (2019): 56–76. http://dx.doi.org/10.25205/2541-9447-2019-14-2-56-76.

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The work is devoted to experimental study of the structure and acoustic radiation of a supersonic underexpanded jet Ma = 1, Npr = 5 with the presence of vortexgenerators in the form of small-sized jets injections. Ten different configurations were tested, in which following the gas-dynamic and geometrical parameters of the microjets were changed one by one: microjets pressure, the injection distance from the main nozzle section, azimuthal, tangential, and axial angles of micronozzles inclination. The flow visualization, azimuthal Pitot pressure profiles and characteristics of jet noise in the

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Louisos, W. F., A. A. Alexeenko, D. L. Hitt, and A. Zilic. "Design considerations for supersonic micronozzles." International Journal of Manufacturing Research 3, no. 1 (2008): 80. http://dx.doi.org/10.1504/ijmr.2008.016453.

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Rainchik, S. V. "System for calibrating critical micronozzles." Measurement Techniques 29, no. 1 (1986): 10–12. http://dx.doi.org/10.1007/bf00862467.

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Groper, Emily R., Jack A. Barnes, Rory McEwen, Younès Messaddeq, Richard D. Oleschuk, and Hans-Peter Loock. "Fabrication and characterization of laser-heated, multiplexed electrospray emitter." Analyst 146, no. 9 (2021): 2834–41. http://dx.doi.org/10.1039/d1an00264c.

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Silva, S., M. C. Salvadori, K. Kawakita, M. T. Pereira, W. Rossi, and M. Cattani. "Fabrication of diamond flow controller micronozzles." Diamond and Related Materials 11, no. 2 (2002): 237–41. http://dx.doi.org/10.1016/s0925-9635(01)00693-8.

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Wang, Yunxia, Yong Zhang, Zheng Qiao, and Wanjun Wang. "A 3D Printed Jet Mixer for Centrifugal Microfluidic Platforms." Micromachines 11, no. 7 (2020): 695. http://dx.doi.org/10.3390/mi11070695.

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Homogeneous mixing of microscopic volume fluids at low Reynolds number is of great significance for a wide range of chemical, biological, and medical applications. An efficient jet mixer with arrays of micronozzles was designed and fabricated using additive manufacturing (three-dimensional (3D) printing) technology for applications in centrifugal microfluidic platforms. The contact surface of miscible liquids was enhanced significantly by impinging plumes from two opposite arrays of micronozzles to improve mixing performance. The mixing efficiency was evaluated and compared with the commonly u

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Dissertations / Theses on the topic "Micronozzles"

1

Hammel, Jeffrey Robert. "Development of an unstructured 3-D direct simulation Monte Carlo/particle-in-cell code and the simulation of microthruster flows." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0510102-153614.

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Li, Sheng. "Design, fabrication and testing of micronozzles for gas sensing applications." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3389.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Pearl, Jason M. "Two-Dimensional Numerical Study of Micronozzle Geometry." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/579.

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Supersonic micronozzles operate in the unique viscosupersonic flow regime, characterized by large Mach numbers (M>1) and low Reynolds numbers (Re<1000). Past research has primarily focused on the design and analysis of converging-diverging de Laval nozzles; however, plug (i.e. centerbody) designs also have some promising characteristics that might make them amenable to microscale operation. In this study, the effects of plug geometry on plug micronozzle performance are examined for the Reynolds number range Re = 80-640 using 2D Navier-Stokes-based simulations. Nozzle plugs are shortened to red

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Abdollahzadeh, Delaram. "Toward the fabrication and testing of all-polymer micronozzle." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/38249.

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A disposable all-polymer micronozzle was designed and fabricated by merging the two different technologies of microfluidics and microneedles together. Polymer micronozzles (polyimide and SU-8) were fabricated using different steps of spin casting and one step of photolithography. Microfluidic devices consisting of one input channel and one output channel each with a 500µm diameter, and connected with a channel 100µm in width, were fabricated using the PDMS polydimethylsiloxane (PDMS) casting. To achieve a thin PDMS membrane, spin casting of PDMS over the mold is required. The fabricated thin

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Sebastião, Israel Borges. "Numerical simulation of MEMS-based cold gas micronozzle flows." Instituto Nacional de Pesquisas Espaciais, 2011. http://urlib.net/sid.inpe.br/mtc-m19/2011/08.11.13.08.

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A atual tendência no projeto de sistemas espaciais tem caminhado no sentido de se reduzir o custo do ciclo de vida dos programas através da redução da complexidade das missões dos satélites. Nesse contexto, umas das opções diz respetio à redução da massa total do sistema. Desse modo, conceitos de micropropulsão baseados em microtecnologias têm sido desenvolvidos a fim de se atender as exigências das futuras missões espaciais. O atual estágio da tecnologia de semicondutores à base de silício tem permitido a fabricação de sistemas de pequena escala, denominados por MEMS(MicroElectroMechanical Sy

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Vargas, Catalan Ernesto. "Design and Manufacturing of a Rotationally Symmetric Cold Gas Nozzle in Silicon." Thesis, Uppsala universitet, Ångström Space Technology Centre (ÅSTC), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-182199.

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In this master thesis, the goal was to devise design patterns and a fabrication processfor manufacturing a 3-D rotationally symmetric converging-diverging cold gasmicronozzle in silicon.The report explains the theory of etching and the methods involved. The work beginswith calculations and simulations of the etching processes. The chosen etch techniqueutilizes so called microloading and reactive ion etching lag effects, which essentially arephenomena where the etch rate can be adjusted by breaking up mask features intosubpatterns, and the etch depth for a given recipe and time can be made to d

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Hsu, Chin-Chun, and 許欽淳. "Investigation of Micronozzles Flow." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/58307870343410508881.

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博士<br>淡江大學<br>機械與機電工程學系博士班<br>96<br>This study presents the investigating of microchannels flow. It is divided into two parts, the flow characteristics of micro venturi and the performance of straight-walled and curved-walled micro nozzle/diffuser respectively. The experimental results are also compared with the simulation results whereby we can observe the flow field in micro venturi and discuss the bounder effect of micro nozzle/diffuser. First, we adopt MEMS technology to fabricate micro venturis with different widths of 150 and 200 um respectively and utilize FLUENT software to analyze the

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Shiue, Gueng-Shuen, and 薛光舜. "DSMC Simulation of 2D Convergent Micronozzle Flow." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/88811217048227124250.

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碩士<br>國防大學理工學院<br>航空太空工程碩士班<br>99<br>In this study, it uses Direct Simulation Monte Carlo (DSMC) method with trapezoidal meshes to simulate characteristics of flows field for two-dimensional convergent micronozzle. The influence of the micro/nanoscale rarefied gas effects on flow characteristics were investigated and analyzed. First, real three-dimensional micronozzle flow field use simplified to a two–dimensional convergent micronozzle. Modified no time counter (M-NTC) rule is applied on the selection of representative collision pairs. Different reflect boundary conditions, such as specular/d

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Books on the topic "Micronozzles"

1

Bourne, Marlene Avis. Microfluidics technology: Emerging markets for micronozzles, microvalves, and microsystems. Business Communications Co., 1999.

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Mission and Micronozzle Flow Analysis of a High-Temperature Chemical Micropropulsion System. Storming Media, 2002.

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Book chapters on the topic "Micronozzles"

1

Tomkus, V., L. Rimgaila, V. Stankevič, and G. Račiukaitis. "Three-Dimensional Supersonic Sapphire Micronozzles for Laser-Plasma Wakefield Accelerators." In Springer Proceedings in Physics. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73025-7_26.

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La Torre, Federico, Sasa Kenjeres, Chris R. Kleijn, and Jean-Luc P. A. Moerel. "Evaluation of Micronozzle Performance through DSMC, Navier-Stokes and Coupled DSMC/Navier-Stokes Approaches." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01970-8_67.

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Conference papers on the topic "Micronozzles"

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Choudhuri, Ahsan, Benjamin Baird, and S. Gollahalli. "Flow characteristics of micronozzles." In 39th Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-1094.

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2

Lee, John, Matthew G. McMullen, and Adam Huang. "Thrust Measurements of Different Gases in a Micro Nozzle." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-40009.

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It is sought to determine the suitability of fluorine based gases, i.e. 1,1,1,2-Tetrafluoroethane (R-134a), for use in a micronozzle. Several experimental thrust measurements have already been made for micronozzles using air or nitrogen. However, air and nitrogen are too prohibitive in terms of transportation in nano/pico satellites. Fluorine based gases, although not as efficient, offer a huge payoff in terms of transportability. The efficiency of R-134a was found to be about 27% lower than that of nitrogen, while being multitudes better in terms of transportability. Unsteady flow was encount

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Louisos, W. L., and Darren L. Hitt. "Transient Simulations of 3-D Supersonic Micronozzle Flow." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30968.

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A numerical investigation of transient performance of 3D linear micronozzles has been performed. The baseline model for the study is derived from the NASA/Goddard Space Flight Center MEMS-based hydrogen peroxide micro-thruster prototype. The 3D micronozzles investigated here have depths of 25μm, 50μm, 100μm, and 150μm and employ expanders with a 30° half-angle. A hyperbolic-tangent actuation profile is used to model the opening of a microvalve in order to simulate start-up of the thruster. The inlet stagnation pressure when the valve is fully opened is 250kPa and generates a maximum throat Rey

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Louisos, William, and Darren Hitt. "Performance Characteristics of 3D Supersonic Micronozzles." In 38th Fluid Dynamics Conference and Exhibit. American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-4279.

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Reed, Brian, Wim d, and Lisa Dang. "Experimental evaluation of cold flow micronozzles." In 37th Joint Propulsion Conference and Exhibit. American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-3521.

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Bayt, R., A. Ayon, K. Breuer, R. Bayt, A. Ayon, and K. Breuer. "A performance evaluation of MEMS-based micronozzles." In 33rd Joint Propulsion Conference and Exhibit. American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-3169.

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Mo, H. L., V. V. Gadepalli, P. V. Skudarnov, and C. X. Lin. "Continuum Modeling of Gas Flows in Micronozzles." In ASME 3rd International Conference on Microchannels and Minichannels. ASME, 2005. http://dx.doi.org/10.1115/icmm2005-75043.

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Reichmann, Felix, Moritz Koch, Sarah Körner, and Norbert Kockmann. "Internal Jet Formation During Bubble Generation in Microchannels." In ASME 2017 15th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icnmm2017-5545.

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Bubble generation is a very dynamic process including surface forces with fluid flow and structure interaction on short time and length scales. This study describes interaction effects during bubble generation in combination with bubble flow through a nozzle for redispersion purpose. At certain flow velocities and phase ratios, liquid jets within gas bubbles have been observed in microchannels, which origin from the rear tip of the bubble cap and penetrate through the whole bubble. The penetration of the filament or thread leads to bubble surface corrugation and causes bubble breakup, when the

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Ketsdever, Andrew, Dean Wadsworth, Phillip Wapner, Mikhail Ivanov, and Guenadi Markelov. "Fabrication and predicted performance of conical DeLaval micronozzles." In 35th Joint Propulsion Conference and Exhibit. American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-2724.

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Pearl, Jason, William F. Louisos, and Darren L. Hitt. "Three-Dimensional Numerical Study of Linear Plug Micronozzles." In 53rd AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-1621.

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Reports on the topic "Micronozzles"

1

Ivanov, M. S., G. N. Markelov, A. D. Ketsdever, and D. C. Wadsworth. Numerical Study of Cold Gas Micronozzle Flows. Defense Technical Information Center, 1999. http://dx.doi.org/10.21236/ada386960.

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