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Relevant bibliographies by topics / Ventilatore centrifugo

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Academic literature on the topic 'Ventilatore centrifugo'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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Journal articles on the topic "Ventilatore centrifugo"

1

He, Tao, Yu Xiang Sun, and Liu Wang. "Research and Development on Centrifugal Ventilator Selection Software." Advanced Materials Research 756-759 (September 2013): 2111–14. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.2111.

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On basis of ventilator dimensionless performance curve and specific speed, a ventilator selection software is studied on purpose of improving the efficiency of ventilator selection. Utilizing programming technology, a database is built which consists of ventilator type, performance parameter, outline dimensions, etc. Graphical interface is programmed using C# language and performance curve is generated and analyzed by the block of MATLAB. Mixed programming method is used to integrate the above two different programming tools, which shortens software development cycle. Analysis result shows that the software developed by the authors meets application requirements and the selected ventilator type is qualified to be adopted.

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2

Timushev, Sergey. "Numerical Studies of BPF Pressure Pulsation in Centrifugal Ventilators." Journal of Applied Mathematics and Physics 07, no. 12 (2019): 3201–15. http://dx.doi.org/10.4236/jamp.2019.712225.

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3

Oyarzun, M. J., R. Iturriaga, P. Donoso, N. Dussaubat, M. Santos, M. E. Schiappacasse, M. E. Lathrop, C. Larrain, and P. Zapata. "Factors affecting distribution of alveolar surfactant during resting ventilation." American Journal of Physiology-Lung Cellular and Molecular Physiology 261, no. 2 (August 1, 1991): L210—L217. http://dx.doi.org/10.1152/ajplung.1991.261.2.l210.

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Few studies have been done to establish the ventilatory factors affecting alveolar surfactant under resting conditions. Experiments in which ventilatory variables were recorded for 4 h were performed in 12 adult cats breathing spontaneously under pentobarbital sodium anesthesia. After the animals were killed and bronchoalveolar lavages (BALs) were performed, the resulting fluid was subjected to differential centrifugation and determinations of proteins, phospholipids (PL), and disaturated phosphatidylcholine (DSPC). Pellet P1+2 was obtained by two centrifugations at 140 g; the supernatant was centrifuged at 1,000 g to obtain pellet P3 and subsequently at 60,000 g to obtain P4. Pellets P3 and P4 had the higher contents of PL and DSPC. Bivariate and multivariate correlational analyses indicate that 1) total PL in BAL was not related to any of the ventilatory variables studied, 2) PL in P3 and P4 fractions was directly correlated to the physiological range of variations in the frequency of large spontaneous gasps (fL), and 3) PL in P1+2 fraction was inversely related to fL. Cats subjected to bilateral section of carotid nerves, although presenting reduced chemosensory drive and ventilatory chemoreflexes, did not exhibit significant differences in resting ventilatory variables nor in alveolar surfactant components. Present results indicate that the total content of alveolar surfactant is not modified by ventilatory variations within physiological range but that the spontaneous occurrence of large gasps increases the proportion of more active forms of alveolar surfactant. This may mediate the role of augmented breaths in keeping lung compliance and preventing atelectasis under resting ventilatory conditions.

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4

Wahba, A., A. Philip, MF Bauer, M. Kaiser, H. Aebert, and DE Birnbaum. "The blood saving potential of vortex versus roller pump with and without aprotinin." Perfusion 10, no. 5 (September 1995): 333–41. http://dx.doi.org/10.1177/026765919501000509.

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To evaluate the potential of centrifugal blood pumps for saving blood, 120 patients scheduled for elective coronary artery bypass grafting were entered into a prospective randomized trial. A standard roller pump (group I) was compared with a centrifugal blood pump (group II) and roller pump plus aprotinin (group III). There was no significant difference between groups I and I I with respect to free haemoglobin, lactic dehydrogenase, serum bilirubin, platelet surface glycoprotein IIb-IIIa and granule membrane protein 140, chest-tube drainage, use of blood products, length of stay in intensive care, time on ventilator and postoperative mortality. Aprotinin reduced chest-tube drainage and use of blood products significantly. Three cases of graft occlusions were noted in group III. Centrifugal blood pumps offer no advantage in routine heart surgery over conventional roller pumps. Aprotinin reduces blood loss, but does not influence GP IIb-IIIa and GMP 140 expression on blood platelets.

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5

Selvaraj, T., P. Hariharasakthisudhan, S. Pandiaraj, K. Sathickbasha, and Noorani Aslam. "Optimizing the design parameters of radial tip centrifugal blower for dust test chamber application through numerical and statistical analysis." FME Transactions 48, no. 2 (2020): 236–45. http://dx.doi.org/10.5937/fmet2001236s.

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6

Timouchev, S. "Numerical method and software package for prediction of pressure pulsation in centrifugal ventilators." Journal of the Acoustical Society of America 105, no. 2 (February 1999): 944–45. http://dx.doi.org/10.1121/1.425723.

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7

Meyer, A. L., M. Strueber, S. Tomaszek, A. Goerler, A. R. Simon, A. Haverich, and S. Fischer. "Temporary cardiac support with a mini-circuit system consisting of a centrifugal pump and a membrane ventilator." Interactive CardioVascular and Thoracic Surgery 9, no. 5 (August 11, 2009): 780–83. http://dx.doi.org/10.1510/icvts.2009.209783.

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8

Horita, K., Z. L. Cao, and T. Itoh. "Veno-Right Ventricle Bypass as a Lung Support System during Pulmonary Surgery without Ventilation." International Journal of Artificial Organs 20, no. 10 (October 1997): 557–61. http://dx.doi.org/10.1177/039139889702001004.

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A special lung support technique is required during carina! or tracheal surgery. Veno venous extracorporeal membrane oxygenation (ECMO) has become an accepted techinique for temporary lung support. Therefore, the purpose of our experiments was to evaluate the effect of veno venous ECMO (veno-right ventricle bypass) without ventilatory support. In five mongrel dogs, two venous drainage cannula were inserted into the superior vena cava through the right jugular vein and the inferior vena cava through the right femoral vein. In addition, a venous return cannula was inserted into the right ventricle (RV) through the right jugular vein. The veno-right ventricle (veno-RV) bypass system was composed of a centrifugal pump and membrane oxygenator; pump flow was maintained at 88 ± 14 ml/kg/min. Excellent hemodynamics and good oxygenation were obtained. On the basis of these results, we conclude that veno-RV bypass may be used as lung support during pulmonary surgery even though the native lung is not ventilated during the veno-RV bypass procedure.

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9

Cao, Yang Hua, and Shu Xie. "Improving the Qualified Rate of Coloring Inspection about the Bevel Gear in Centrifugal Ventilator by Applying Six Sigma Methodology." Advanced Materials Research 148-149 (October 2010): 219–22. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.219.

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The low qualified rate of coloring inspection about the bevel gear had puzzled the producer for a long time. This paper tried to solve this problem by applying 6σ methodology. It analyzed the influence factors about the qualified rate of bevel gear coloring inspection and found out the main influence factors firstly; then on base of the analysis results, this paper proposed some improvement measures by applying the DOE analysis; finally, this paper validated the effects of these improvement measures by carrying out some tests. The improvement measures proposed in this paper had improved the qualified rate of coloring inspection obviously.

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10

Timuchev, Serguei, Kirill Illichov, and Jean Tourret. "Prediction of BPF pressure pulsation in centrifugai pumps and ventilators with taking into account the effect of machine casing on impeller flow parameters." La Houille Blanche, no. 3-4 (June 2001): 60–64. http://dx.doi.org/10.1051/lhb/2001038.

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Dissertations / Theses on the topic "Ventilatore centrifugo"

1

Bianchini, Marco. "Creazione e validazione del modello fluidodinamico di un ventilatore centrifugo e possibili ottimizzazioni." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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La seguente tesi nasce dall’esigenza di ottimizzare, da un punto di vista acustico e prestazionale, un ventilatore centrifugo preesistente in azienda. Nei primi tre capitoli si è analizzato il problema da un punto di vista teorico, mentre nel terzo e quarto capitolo da un punto di vista computazionale sfruttando tecniche CFD. Nel primo capitolo è stata fatta una trattazione generale dei ventilatori centrifughi, concentrandosi sul tipo di problematiche a cui questi vanno incontro. Nel secondo capitolo è stata presentata la teoria che sta alla base di una rilevazione sperimentale e di un’analisi acustica. Unitamente a ciò sono stati riportati alcuni articoli che mostrano tecniche di ottimizzazione acustica in ventilatori centrifughi. Nel terzo capitolo è stata riassunta la teoria alla base della fluidodinamica e di uno studio fluidodinamico. Nel quarto capitolo viene spiegato come è stato creato il modello fluidodinamico. Si è optato per un’analisi del problema in stato stazionario, sfruttando il Moving Reference Frame, e considerando l’aria come incomprimibile, visto il ridotto numero di Mach. L’analisi acustica è stata effettuata nel post-processing sfruttando il modello di Proudman. Infine è stata dimostrata la correlazione che intercorre tra i tre punti della curva resistente del ventilatore di funzionamento reale, permettendo di estendere i risultati ricavati dalla analisi di uno di questi agli altri due. Nel quinto capitolo è stata effettuata un’analisi dei risultati ottenuti dalle simulazioni fluidodinamiche e sono state proposte diverse modifiche della geometria. La modifica scelta ha visto un miglioramento delle prestazioni e una minore rumorosità. Infine sono state proposte nelle conclusioni ulteriori possibili strade da percorre per un’indagine e ottimizzazione del ventilatore più accurata.

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2

HSIEH, YU-YU, and 謝宇祐. "Study of the Performance Improvement of a Clean-Room Ventilator through Centrifugal Fan’s Design Modification." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/vp9cs4.

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碩士
國立雲林科技大學
機械工程系
106
The object of this research is a FFU unit commonly used in the clean room. The main component is a centrifugal fan with backward-curved blades, which is mounted inside a rectangular cabinet. It is hoped that without altering the design of the cabinet, the device’s output volume flow rate and overall efficiency can be improved by modifying the shape and design of the centrifugal fan. In the study, models were established first using SolidWorks, and then imported into the ANSYS-CFX for flowfield simulation. Design modifications were divided into two parts. The first part was focused on the fan's inlet area, which included the size of the inlet, design curve of the bellmouth and the fan's inlet, and the addition of guide blades inside the bellmouth. The second part was then concentrated on the fan body, which included the design of the fan blade using velocity triangle theory, modifing the angle of the inlet and the outlet of the blade, selecting proper NACA airfoil section for the blade, adjusting the angle of the blade tilt, the size of the impeller’s outside diameter, the number and height of the blades, and the design of the bottom plate of the fan. Finally, conclusions on each parameters were integrated for designing a better bellmouth and fan. Based on the results, it is showed that if the original blades’ top triangle and extension piece are removed, both volume flow rate and efficiency can be improved. If using the redesigned fan as the baseline model for comparison, parameters such as the size of the inlet and outer diameter, arc radius at the fan's inlet, the number of blades, and the height of blades all possess an optimum value, and proper adjustment could improve fan’s performance. In addition, blades design based on the velocity triangle theory can effectively improve the output pressure and volume flow rate. In conjunction with the modification of blade’s starting position and angle of inclination, torque required could be further reduced to increase the efficiency, with a accompanied loss of volume flow rate. Also, the replacement of blades with NACA 9506 airfoil section could further provide significant improvements in performance. As for the adjusting of the curve of bellmouth, or adding guide blades and bottomplate’s fairing, no noticeable improvement could be achieved. At the end, a final design that integrates the conclusions on all the design parameters was studied, which shows an increase of 33.60% on volume flow rate, and 16.85% boost on efficiency under the operation condition. In addition, substantial lift on the FFU’s performance curve can also be seen. Keywords：Centrifugal Fan, FFU, Velocity Triangle, NACA Airfoil.

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Books on the topic "Ventilatore centrifugo"

1

The 2006-2011 World Outlook for Centrifugal-Type Power Roof Ventilators Excluding Parts. Icon Group International, Inc., 2005.

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2

Parker, Philip M. The 2007-2012 World Outlook for Centrifugal-Type Power Roof Ventilators Excluding Parts. ICON Group International, Inc., 2006.

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3

The 2006-2011 World Outlook for Penthouses, Shutters, Guards, and Other Parts and Accessories for Industrial Centrifugal, Axial, and Propeller Fans and Blowers Excluding Power Roof Ventilators. Icon Group International, Inc., 2005.

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4

Parker, Philip M. The 2007-2012 World Outlook for Penthouses, Shutters, Guards, and Other Parts and Accessories for Industrial Centrifugal, Axial, and Propeller Fans and Blowers Excluding Power Roof Ventilators. ICON Group International, Inc., 2006.

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Conference papers on the topic "Ventilatore centrifugo"

1

Wu, Xingwei. "Vibration faults diagnosis for centrifugal ventilator based on DDAGSVM." In 2012 International Symposium on Instrumentation & Measurement, Sensor Network and Automation (IMSNA). IEEE, 2012. http://dx.doi.org/10.1109/msna.2012.6324577.

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2

Xiao-ming, Yu, and Li Jin-feng. "Centrifugal multi-wing type ventilator performance improvement and Numerical simulation." In 2010 International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2010. http://dx.doi.org/10.1109/mace.2010.5536700.

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3

Timushev, Sergey. "Development and Experimental Validation of 3D Acoustic-Vortex Numerical Procedure for Centrifugal Pump Noise Prediction." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78400.

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Numerical procedure of 3D flow induced noise modeling in centrifugal pumps is developed by linking the acoustic-vortex computational method of pseudo-sound and noise prediction that earlier was implemented in two dimensional prediction of pressure pulsations and noise and CFD code FlowVision. The 3D CFD–CAA acoustic-vortex method is validated by experiments on axial and centrifugal ventilators. Measurements of pressure pulsations and noise are completed for a wide range of rotation speeds. Further computational tests are made for a centrifugal boiler feed pump stage with and without vane diffuser.

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4

Wu, Xing-wei. "The Study of Bearing Vibration of Large-Scale Centrifugal Ventilator Forecast Based-On Support Vector Autoregressive." In 2011 Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2011. http://dx.doi.org/10.1109/appeec.2011.5749047.

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5

Casey, Michael, Christof Zwyssig, and Chris Robinson. "The Cordier Line for Mixed Flow Compressors." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22549.

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The specific speed and specific diameter of radial, mixed and axial flow compressors can be plotted in a Cordier diagram, and the best compressors then lie in a relatively narrow band, known as the Cordier or Balje line. This line exhibits a distinctive s-shape, and it is shown in this paper that this is due to the variation of the centrifugal effect on the pressure rise of the different compressor types. A new equation for the Cordier line in the mixed flow region based on the pressure rise coefficient is developed and calibrated with data from mixed flow pumps and ventilators. Together with other empirical relationships for the expected efficiency as a function of the specific speed this provides some useful new guidelines for the preliminary design of mixed flow compressors. These guidelines are then examined by carrying out a preliminary design of a high-speed mixed-flow micro-compressor that is analyzed using CFD and tested to justify the approach.

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