Academic literature on the topic 'Pneumatic absorber'

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Journal articles on the topic "Pneumatic absorber"

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Faraj, Rami, Cezary Graczykowski, and Jan Holnicki-Szulc. "Adaptable pneumatic shock absorber." Journal of Vibration and Control 25, no. 3 (2018): 711–21. http://dx.doi.org/10.1177/1077546318795532.

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Recent progress in the field of sensors, actuators, and smart materials allows the construction of more and more efficient controllable pneumatic dampers for shock absorption. Typically, such devices apply online semi-active control techniques, which utilize electromagnetic, piezoelectric, or magnetostrictive valves. As a result, they are characterized by a high efficiency of impact absorption, but simultaneously by a complicated construction and a specialized electronic system. The alternative solutions are semi-passive absorbers that ensure a similar performance by using a much simpler, low-
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Komarov, S. S., N. I. Miskaktin, and N. Yu Tsvileneva. "Landing of descent objects with a closed spherical pneumatic shock absorber." Proceedings of the Mavlyutov Institute of Mechanics 3 (2003): 60–71. http://dx.doi.org/10.21662/uim2003.1.004.

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The landing of the landing object with a closed pneumatic shock absorber is considered. A mathematical model of planting the ”object–pneumatic shock absorber“ system is being constructed. Nonlinear boundary conditions in the sealing of the pneumatic shock absorber on the body of the landing object and in the area of interaction with the screen in the power structures in the ”object–pneumatic shock absorber“ movement system.
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Sheikh Al-Shabab, Ahmed A., Bojan Grenko, Paulo A. S. F. Silva, Antonis F. Antoniadis, Panagiotis Tsoutsanis, and Martin Skote. "Unsteady Multiphase Simulation of Oleo-Pneumatic Shock Absorber Flow." Fluids 9, no. 3 (2024): 68. http://dx.doi.org/10.3390/fluids9030068.

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The internal flow in oleo-pneumatic shock absorbers is a complex multiphysics problem combining the interaction between highly unsteady turbulent flow and multiphase mixing, among other effects. The aim is to present a validated simulation methodology that facilitates shock absorber performance prediction by capturing the dominant internal flow physics. This is achieved by simulating a drop test of approximately 1 tonne with an initial contact vertical speed of 2.7 m/s, corresponding to a light jet. The flow field solver is ANSYS Fluent, using an unsteady two-dimensional axisymmetric multiphas
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Du, Siyuan, Changming Zhang, Ke Zhou, and Zhixin Zhao. "Study of the Two-Phase Flow Characteristics of a Damping Orifice in an Oleo-Pneumatic Shock Absorber." Fluids 7, no. 12 (2022): 360. http://dx.doi.org/10.3390/fluids7120360.

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The oleo-pneumatic shock absorber involves a complex two-phase flow in the working process. In this paper, a simple oleo-pneumatic shock absorber model was established, and the volume-of-fluid (VOF) two-phase flow model was adopted to accurately simulate the distribution of the two-phase flow field in the shock absorber through the commercial software FLUENT 2020 R2. The accuracy of the simulation model was verified by the method of engineering damping force estimation, and the error of the numerical simulation results compared with the engineering estimation results was 7–8%. By numerical sim
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Mikułowski, Grzegorz, and Rafał Wiszowaty. "Pneumatic Adaptive Absorber: Mathematical Modelling with Experimental Verification." Mathematical Problems in Engineering 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/7074206.

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Many of mechanical energy absorbers utilized in engineering structures are hydraulic dampers, since they are simple and highly efficient and have favourable volume to load capacity ratio. However, there exist fields of applications where a threat of toxic contamination with the hydraulic fluid contents must be avoided, for example, food or pharmacy industries. A solution here can be a Pneumatic Adaptive Absorber (PAA), which is characterized by a high dissipation efficiency and an inactive medium. In order to properly analyse the characteristics of a PAA, an adequate mathematical model is requ
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Dinc, Ali, Faruk Yildiz, Junkun Ma, et al. "Dynamics of Oleo-Pneumatic Landing Gear Systems for Carrier-Based Unmanned Aerial Vehicles." Aerospace 12, no. 2 (2025): 127. https://doi.org/10.3390/aerospace12020127.

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This paper presents a comprehensive analysis of the dynamics and design of oleo-pneumatic shock absorbers for the landing gear of carrier-based Unmanned Aerial Vehicles (UAVs). Carrier-based operations impose unique challenges due to high-impact landings, necessitating robust landing gear systems capable of withstanding significant g-forces. The study investigates the performance of landing gears designed for carrier operations under various sink rates, utilizing computer simulations to model the dynamics of both sprung and unsprung masses. The design process for an oleo-pneumatic main landing
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Silva, Paulo A. S. F., Ahmed A. Sheikh Al-Shabab, Panagiotis Tsoutsanis, and Martin Skote. "Study of Orifice Design on Oleo-Pneumatic Shock Absorber." Fluids 9, no. 5 (2024): 108. http://dx.doi.org/10.3390/fluids9050108.

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Aircraft oil-strut shock absorbers rely on orifice designs to control fluid flow and optimize damping performance. However, the complex nature of cavitating flows poses significant challenges in predicting the influence of orifice geometry on energy dissipation and system reliability. This study presents a comprehensive computational fluid dynamics (CFD) analysis of the effects of circular, rectangular, semicircular, and cutback orifice profiles on the internal flow characteristics and damping behavior of oleo-pneumatic shock absorbers. High-fidelity simulations reveal that the rectangular ori
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Hu, Jun Xiu, Hao Bin Jiang, Chen Long, and Tao Wang. "A New Type Adjustable Shock Absorber and its Characteristic Model." Advanced Materials Research 97-101 (March 2010): 3423–27. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3423.

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A new type adjustable hydraulic shock absorber for a bus air suspension is designed, the solenoid valve and swing pneumatic cylinder are adopted as driving device for changing damping states. The structure and work principle of the shock absorber is introduced. By applying hydrodynamic theory, a mathematical model of shock absorber’s damping characteristic is built. Several typical algorithms for calculating damping valve plate’s deflection are analyzed. Conjugate Beam Method, an approximate method with relatively less calculation work, is chosen to calculate the deflection of valve plates. Ma
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Yazici, Hakan, and Mert Sever. "Active control of a non-linear landing gear system having oleo pneumatic shock absorber using robust linear quadratic regulator approach." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 13 (2017): 2397–411. http://dx.doi.org/10.1177/0954410017713773.

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This paper deals with the active control of a non-linear active landing gear system equipped with oleo pneumatic shock absorber. Runway induced vibration can cause reduction of pilot’s capability of control the aircraft and results the safety problem before take-off and after landing. Moreover, passenger–crew comfort is adversely affected by vertical vibrations of the fuselage. The active landing gears equipped with oleo pneumatic shock absorber are highly non-linear systems. In this study, uncertain polytopic state space representation is developed by modelling the pneumatic shock absorber dy
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Voytko, A. M. "Method for calculating the speed characteristicsof a single-tube shock absorber." Вестник гражданских инженеров 17, no. 2 (2020): 168–72. http://dx.doi.org/10.23968/1999-5571-2020-17-2-168-172.

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The article describes a method for calculating the speed characteristics of a single-tube hydro-pneumatic shock absorber developed by the author based on the use of basic approaches to the calculation of damping hydraulic systems. A regressive type of characteristic is substantiated in relation to the operating conditions of a specialized vehicle in urban conditions. There has been performed calculation and analysis of the speed characteristics of the hydro-pneumatic shock absorber proposed for use on Ford Transit ambulances.
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Dissertations / Theses on the topic "Pneumatic absorber"

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Trávníček, Ivo. "Jednoúčelový automatický stroj pro kompletaci automobilových dílů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230088.

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Práce se zabývá návrhem jednoúčelového plně automatického zařízení pro automobilový průmysl, které dávkuje silikonovou směs do pouzdra snímače. V první části práce je řešen návrh mechanické části zařízení, zejména manipulátoru pro polohování dávkovací hlavy. K pohonu manipulátoru je využito pneumatických prvků, které jsou řízeny elektrickými signály. Druhá část práce se zabývá řízením stroje, které je realizováno pomocí PLC systému. Obsluha může ovládat zařízení nebo sledovat aktuální stav na dotykovém panelu. V závěru práce je prezentováno skutečné provedení zařízení a propojení s výrobní lin
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Bourne, David. "Alternative dynamic impact testing : component screening of FMH-energy absorber safety plastic\2122." Thesis, University West, Department of Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-833.

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Novák, Aleš. "Návrh konstrukce zakladače k bezhroté brusce Jupiter 125." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228223.

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Thesis deal with proposal construction Chalder for centreless grinding machine Jupiter 125. Chalder is designed for workpiece with maximum average 12 mm, maximum longitude 120 mm and mass 0,1 kg. In the thesis are described components that were used at solving and intended time exchanges workpiece, the economics estimation and processed needed design documentation.
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Rue, Timothy James. "Modular Vehicle Design Concept." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51219.

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Outlined herein is the Modular Vehicle [MODV] concept as a cost effective, utilitarian, and highly functional vehicle concept for the changing demands placed on a MAGTF [Marine Air-Ground Task Force] or SP-MAGTF [Special Purpose Marine Air-Ground Task Force] in the 21st century. A large focus is put on the importance of modularity and cost effectiveness of having a 24 hour configurable vehicle to a specific mission and area of operation. Off-road vehicle progression through history is presented and successful design features are noted in order to develop underlying goals for the modular vehicl
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Ou, Sheng-Ming, and 歐昇明. "Optimal Design and Performance Testing of a Hydro-pneumatic Rear Shock Absorber of a Bicycle." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/45223608011530983164.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>93<br>This paper has analyzed on a hydro-pneumatic rear shock absorber for a Bicycle. The high-pressure gas was sealed in the hydro-pneumatic rear shock absorber. It replaced general wire-spring with air-spring. In the result of the digital simulation and the experiment, the performance of the hydro-pneumatic rear shock absorber is better than the general shock absorber.  The hydro-pneumatic rear shock absorber was analyzed and designed by means of a mathematical model and an experimental method. A digital simulation was used to obtain force-displacement (F-D) and
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Thacher, Eric. "Simulation based design and performance assessment of a controlled cascaded pneumatic wave energy converter." Thesis, 2017. https://dspace.library.uvic.ca//handle/1828/8535.

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The AOE Accumulated Ocean Energy Inc. (AOE) wave energy converter (WEC) is a cascaded pneumatic system, in which air is successively compressed through three point absorber devices on the way to shore; this air is then used to drive an electricity generator. To better quantify the performance of this device, this thesis presents a dynamically coupled model architecture of the AOE WEC, which was developed using the finite element solver ProteusDS and MATLAB/Simulink. This model is subsequently applied for the development and implementation of control in the AOE WEC. At each control stage, compr
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Books on the topic "Pneumatic absorber"

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The 2006-2011 World Outlook for Non-Aerospace-Type Hydraulic and Pneumatic Non-Vehicle Shock Absorbers and Cushions. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Non-Aerospace-Type Hydraulic and Pneumatic Non-Vehicle Shock Absorbers and Cushions. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Parts Sold Separately for Aerospace-Type Hydraulic and Pneumatic Fluid Power Cylinders, Actuators, Accumulators, Cushions, and Non-Vehicle Shock Absorbers. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Parts Sold Separately for Aerospace-Type Hydraulic and Pneumatic Fluid Power Cylinders, Actuators, Accumulators, Cushions, and Non-Vehicle Shock Absorbers. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Parts Sold Separately for Non-Aerospace-Type Hydraulic and Pneumatic Fluid Power Cylinders, Actuators, Accumulators, Cushions, and Non-Vehicle Shock Absorbers. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Parts Sold Separately for Non-Aerospace-Type Hydraulic and Pneumatic Fluid Power Cylinders, Actuators, Accumulators, Cushions, and Non-Vehicle Shock Absorbers. ICON Group International, Inc., 2006.

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Book chapters on the topic "Pneumatic absorber"

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Sheikh Al-Shabab, Ahmed A., Paulo A. S. F. Silva, Bojan Grenko, Panagiotis Tsoutsanis, and Martin Skote. "A Modular Multifidelity Approach for Multiphysics Oleo-Pneumatic Shock Absorber Simulations." In Proceedings of the Cambridge Unsteady Flow Symposium 2024. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-69035-8_8.

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Conference papers on the topic "Pneumatic absorber"

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Knott, Michael, and Brandon Hall. "Reusable Energy Absorbing Lab (REAL) Seat." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10144.

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Energy absorbing seats have played a critical role in increasing the survivability of rotary wing mishaps in both military and civilian rotorcraft. By using various methods of energy absorption, crashworthy seats limit occupant exposure to potentially injurious spinal loading and whole-body accelerations during a mishap. When testing aircrew-mounted equipment, or while conducting experiments on crashworthy seating systems, the costs associated with using a new or refurbished crashworthy seating system can prove to be cost prohibitive. To alleviate this cost burden and provide for substantially
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Knott, Michael, and Brandon Hall. "Reusable Energy Absorbing Lab (REAL) Seat." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9476.

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Energy absorbing seats have played a critical role in increasing the survivability of rotary wing mishaps in both military and civilian rotorcraft. By using various methods of energy absorption, crashworthy seats limit occupant exposure to potentially injurious spinal loading and whole-body accelerations during a mishap. When testing aircrew-mounted equipment, or while conducting experiments on crashworthy seating systems, the costs associated with using a new or refurbished crashworthy seating system can prove to be cost prohibitive. To alleviate this cost burden and provide for substantially
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Zhang, He, Tianjin Li, Weiwei Qi, Zhiyong Huang, and Hanliang Bo. "Experimental Study on Restart Performance of Absorber Sphere Pneumatic Conveying." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-30495.

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In the high-temperature gas-cooled reactor pebble-bed module (HTR-PM), absorber sphere shutdown system is the second shutdown system. Absorber spheres are transported back to storage vessel by pneumatic conveying when reactor needs to be started. The restart reliability of absorber sphere pneumatic conveying is quite important. Experimental system for absorber sphere pneumatic conveying has been built to investigate the gas-solid flow characteristics of pneumatic conveying. Restart experiments were conducted to study the restart performance of pneumatic conveying. Ambient air was used as sourc
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Salem, A. M., and S. Olutunde Oyadiji. "Comparisons Between Dynamic Characteristics of Pneumatic, Magnetorheological, and Hydraulic Shock Absorbers." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82498.

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The dynamic performance of automotive vehicles is influenced by the suspension system design. Suspensions owing damping elements with a wide range of non-linear behaviour can provide higher mobility and better ride comfort performances. Pneumatic suspensions due to their inherent nonlinear behaviour can provide high mobility performance while suspensions with MR dampers can provide this nonlinearity through the controllable damping force produced by the control of the MR fluid. The pneumatic and MR suspension models are usually developed from experimental force-displacement and force-velocity
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Prusova, O. L., and R. N. Khamitov. "Thermodynamic basics of the pneumatic shock-absorber working." In 2014 Dynamics of Systems, Mechanisms and Machines (Dynamics). IEEE, 2014. http://dx.doi.org/10.1109/dynamics.2014.7005690.

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Bian, Xiaoqiang Sean, Michael W. Spillane, and Oriol R. Rijken. "Motion Reduction for Spar Platform With Hydro-Pneumatic Tensioners." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-50223.

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The Spar platform is one of the options to support dry-trees from a floating unit, particularly in increasing water depth. The recent Spar developments in Gulf of Mexico (GOM) favor Spar Supported Hydro-pneumatic Tensioners to support Top Tensioned Vertical Risers (TTR). The trend has been made possible by, as well as promoted the long-stroke RAM type hydro-pneumatic tensioner market. Currently up to 35 ft stroke tensioners are technically available and 28 ft ones are installed and field tested on GOM spars. The primary advantage, compared with buoyancy cans, is its possible integrated install
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Al-Shabab, A., D. Vitlaris, Z. Lin, et al. "Numerical Investigation of Oleo-Pneumatic Shock Absorber: Setup and Validation." In 14th WCCM-ECCOMAS Congress. CIMNE, 2021. http://dx.doi.org/10.23967/wccm-eccomas.2020.231.

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Sheikh Al-Shabab, A., B. Grenko, D. Vitlaris, P. Tsoutsanis, A. Antoniadis, and M. Skote. "Numerical Investigation of Oleo-Pneumatic Shock Absorber: A Multifidelity Approach." In 8th European Congress on Computational Methods in Applied Sciences and Engineering. CIMNE, 2022. http://dx.doi.org/10.23967/eccomas.2022.201.

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Heininen, Arttu, Jussi Aaltonen, Kari T. Koskinen, and Juha Huitula. "Equations of State in Fighter Aircraft Oleo-pneumatic Shock Absorber Modelling." In The 10th Aerospace Technology Congress, October 8-9, 2019, Stockholm, Sweden. Linköping University Electronic Press, 2019. http://dx.doi.org/10.3384/ecp19162007.

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Li, Tianjin, Feng Chen, He Zhang, et al. "Effect of Feeder Inner Structure on Feeding Performance for Absorber Sphere Pneumatic Conveying." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-15431.

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The sphere feeder is an important component of the absorber sphere shutdown system for absorber sphere conveying. Absorber sphere is entrained and fluidized in the feeder by conveying gas to form gas-solid flow. The effect of feeder inner structure, i.e. the draft tube height, on the feeding performance was investigated. Experiments were conducted in the positive pressure conveying system with ambient air as the source gas. The glass sphere was used to replace the absorber sphere. Three types of feeder inner draft tube relative position were considered. Five combinations of the draft tube heig
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