Log in

Relevant bibliographies by topics / Vortex chamber

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Vortex chamber'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 May 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Vortex chamber.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Vortex chamber"

1

Singh, Ravi Kant, Achintya Kumar Pramanick, and Subhas Chandra Rana. "Numerical study of a double inlet chamber counter flow vortex tube with insulation." IOP Conference Series: Earth and Environmental Science 850, no. 1 (November 1, 2021): 012024. http://dx.doi.org/10.1088/1755-1315/850/1/012024.

Full text

Abstract:

Abstract The present study intends to improve the performance of the Ranque-Hilsch counter flow vortex tube, analysed using computational fluid dynamics. In the axisymmetric 3-D, steady-state, compressible, and turbulent flow vortex tube, the air has been used as the working fluid. The ANSYS17.1 FLUENT software has been used with the standard º-ε turbulent model for different mass fraction of cold fluid and inlet pressure in the numerical simulation and validated with the experimental results. It is observed from the study that as the inlet chambers number increases from 1 to 2, there is a decrease of 7.8 % in the cold exit temperature of the vortex tube. However, insulating the double chamber vortex tube leads to a further reduction of 4.2% in the cold exit temperature. Therefore, it indicates that the overall decline in the cold exit temperature from one chamber non-insulated vortex tube to double chamber insulated vortex tube is 9.6%. In terms of cold exit temperature, it can be concluded that using a double inlet chamber vortex tube with insulation yields the optimum results.

APA, Harvard, Vancouver, ISO, and other styles

2

Jawarneh, Ali M., P. Sakaris, and Georgios H. Vatistas. "Experimental and Analytical Study of the Pressure Drop Across a Double-Outlet Vortex Chamber." Journal of Fluids Engineering 129, no. 1 (June 8, 2006): 100–105. http://dx.doi.org/10.1115/1.2375131.

Full text

Abstract:

This paper presents experimental and analytical results concerning the pressure drop and the core size in vortex chambers. The new formulation is based on the conservation of mass and energy integral equations and takes into account the presence of two outlet ports. The diminishing vortex strength is introduced through the vortex decay factor. The influence of vortex chamber geometry, such as diameter ratio, aspect ratio, and Reynolds number, on the flow field have been examined and compared with the present experimental data. It is shown that the presence of the swirl velocity component makes the pressure drop across a vortex chamber significantly different than the familiar unidirectional pipe flow. When the chamber length is increased, the vortex diminishes under the action of friction, producing a weaker centrifugal force which leads to a further pressure drop. It is revealed that by increasing the Reynolds number, the cores expand resulting into a larger pressure coefficient. For a double-outlet chamber where the flow is divided into two streams, the last parameter is found to be less than that of a single-outlet.

APA, Harvard, Vancouver, ISO, and other styles

3

Wei, Xianggeng, Jiang Li, and Guoqiang He. "Influence of Structural Parameters on the Performance of Vortex Valve Variable-Thrust Solid Rocket Motor." International Journal of Turbo & Jet-Engines 34, no. 1 (January 1, 2017): 1–9. http://dx.doi.org/10.1515/tjj-2015-0047.

Full text

Abstract:

AbstractThe vortex valve solid variable thrust motor is a new solid motor which can achieve Vehicle system trajectory optimization and motor energy management. Numerical calculation was performed to investigate the influence of vortex chamber diameter, vortex chamber shape, and vortex chamber height of the vortex valve solid variable thrust motor on modulation performance. The test results verified that the calculation results are consistent with laboratory results with a maximum error of 9.5%. The research drew the following major conclusions: the optimal modulation performance was achieved in a cylindrical vortex chamber, increasing the vortex chamber diameter improved the modulation performance of the vortex valve solid variable thrust motor, optimal modulation performance could be achieved when the height of the vortex chamber is half of the vortex chamber outlet diameter, and the hot gas control flow could result in an enhancement of modulation performance. The results can provide the basis for establishing the design method of the vortex valve solid variable thrust motor.

APA, Harvard, Vancouver, ISO, and other styles

4

Baz, A., and J. Gilheany. "Vortex Tube-Assisted Environmental Control of Hyperbaric Chambers." Journal of Energy Resources Technology 110, no. 4 (December 1, 1988): 230–36. http://dx.doi.org/10.1115/1.3231387.

Full text

Abstract:

Model predictions of time histories of the temperature and humidity ratio within a hyperbaric chamber under conditions of compression and decompression are presented with and without vortex tube-assisted environmental control. The effects of ventilation and ascent and descent rates on the environment within the chamber and the power required by the environmental control system, with and without vortex tube assist, are also presented. Results demonstrate that the vortex tube assist system is an effective means of more precisely controlling the environment within hyperbaric chambers with substantial savings in power. The model used incorporates a complete description of the pyschrometric properties of the humid gas mixture within the chamber, plus the sensible and latent heat loads produced by the occupants and wet porch.

APA, Harvard, Vancouver, ISO, and other styles

5

Akhmetov, D. G., and T. D. Akhmetov. "Swirl flow in vortex chamber." Science Bulletin 6, no. 4 (2015): 109–20. http://dx.doi.org/10.17117/nv.2015.04.109.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Rajesh, T. N., T. J. S. Jothi, and T. Jayachandran. "Preliminary Studies on Non-Reactive Flow Vortex Cooling." Recent Patents on Mechanical Engineering 12, no. 3 (September 26, 2019): 262–71. http://dx.doi.org/10.2174/2212797612666190510115403.

Full text

Abstract:

Background: The impulse for the propulsion of a rocket engine is obtained from the combustion of propellant mixture inside the combustion chamber and as the plume exhausts through a convergent- divergent nozzle. At stoichiometric ratio, the temperature inside the combustion chamber can be as high as 3500K. Thus, effective cooling of the thrust chamber becomes an essential criterion while designing a rocket engine. Objective: A new cooling method of thrust chambers was introduced by Chiaverni, which is termed as Vortex Combustion Cold-Wall Chamber (VCCW). The patent works on cyclone separators and confined vortex flow mechanism for providing high propellant mixing with improved degree of turbulence inside the combustion chamber, providing the required notion for studies on VCCW. The flow inside a VCCW has a complex structure characterised by axial pressure losses, swirl velocities, centrifugal force, flow reversal and strong turbulence. In order to study the flow phenomenon, both the experimental and numerical investigations are carried out. Methods: In this study, non-reactive flow analysis was conducted with real propellants like gaseous oxygen and hydrogen. The test was conducted to analyse the influence of mixture ratio and injection pressure of the propellants on the chamber pressure in a vortex combustion chamber. A vortex combustor was designed in which the oxidiser injected tangentially at the aft end near the nozzle spiraled up to the top plate and formed an inner core inside the chamber. The fuel was injected radially from injectors provided near the top plate and the propellants were mixed in the inner core. This resulted in enhanced mixing and increased residence time for the fuel. More information on the flow behaviour has been obtained by numerical analysis in Fluent. The test also investigated the sensitivity of the tangential injection pressure on the chamber pressure development. Results: All the test cases showed an increase in chamber pressure with the mixture ratio and injection pressure of the propellants. The maximum chamber pressure was found to be 3.8 bar at PC1 and 2.7 bar at PC2 when oxidiser to fuel ratio was 6.87. There was a reduction in chamber pressure of 1.1 bar and 0.7 bar at PC1 and PC2, respectively, in both the cases when hydrogen was injected. A small variation in the pressure of the propellant injected tangentially made a pronounced effect on the chamber pressure and hence vortex combustion chamber was found to be very sensitive to the tangential injection pressure. Conclusion: VCCW mechanism has been to be found to be very effective for keeping the chamber surface within the permissible limit and also reducing the payload of the space vehicle.

APA, Harvard, Vancouver, ISO, and other styles

7

Zehad, Shahadat Hossain, Sadman Al Faiyaz, Md Redwan Islam, and Dr Ing Irfan Ahmed. "Numerical Analysis of Gravitational Vortex Chamber." Technium: Romanian Journal of Applied Sciences and Technology 3, no. 10 (November 10, 2021): 11–22. http://dx.doi.org/10.47577/technium.v3i10.4955.

Full text

Abstract:

A rotating mass of fluid is known as vortex and the motion of the rotating mass of fluid is known as vortex motion. Vorticity is the circulation per unit area. In this research simulation of a vortex chamber is to be carried out in ANSYS CFD taking water as fluid domain for generating a water vortex that is capable enough to move a turbine for electricity generation. The CAD modelling of the setup was set down and simulation was done in fine mesh by taking suitable wall function in the model of a cylindrical chamber along with a rectangular channel with a contraction portion at the end of it where good amount of vortex generation was acquired by observing velocity and pressure by setting different parameters. The results shows the pressure and velocity contours with 3D velocity streamline flow and the curve of the velocity and pressure curve shows the decrease of pressure and increase of velocity from inlet to outlet that leads to a decent vortex generation.

APA, Harvard, Vancouver, ISO, and other styles

8

Baranov, N. F., and A. A. Zykin. "Configuration of vortex chambers and air flow velocity in the crushing chamber of a hammer crusher." Traktory i sel hozmashiny 79, no. 9 (September 15, 2012): 39–41. http://dx.doi.org/10.17816/0321-4443-69486.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Pasymi, Pasymi, Y. W. Budhi, A. Irawan, and Y. Bindar. "Three dimensional cyclonic turbulent flow structures at various geometries, inlet-outlet orientations and operating conditions." Journal of Mechanical Engineering and Sciences 12, no. 4 (December 27, 2018): 4300–4328. http://dx.doi.org/10.15282/jmes.12.4.2018.23.0369.

Full text

Abstract:

Flow structure inside a chamber greatly determines the process performances. Therefore, the flow structure inside a chamber are often constructed in such a way as an effort to obtain equipment performances in accordance with the expectations. This study explored flow structure inside several chamber geometries and operating conditions. Three types of chamber, namely; GTC, DTC and TJC were set as the investigated chambers. The Computational Fluid Dynamics technique, supported by some experimental data from the literature, is used as an investigation method. The RANS based models, under Ansys-Fluent software were used in this numerical investigation. Simulation results revealed that the flow structures of GTC and DTC are predominantly created by spiral and vortex patterns. The vortex stabilizer diameter in the GTC affects the vortex pattern, velocity profile and pressure drop. The flow structure of DTC presents the most complex behavior. The flow structure inside TJC, in the case of unconfined outlet boundary, is characterized by the helical and wavy jet pattern. This structure is determined by the initial tangential intensity (IIT) and the inlet aspect ratio (RIA). The structures of vortex, helical, and wavy axial flow are properly constructed and visualized in this paper. There is no a turbulence model which is always superior to the other models, consistently. The standard k-ε model exhibits the realistic and robust performances among all of investigatied cases.

APA, Harvard, Vancouver, ISO, and other styles

10

Matveev, Konstantin I., and Jacob Leachman. "Numerical Simulations of Cryogenic Hydrogen Cooling in Vortex Tubes with Smooth Transitions." Energies 14, no. 5 (March 5, 2021): 1429. http://dx.doi.org/10.3390/en14051429.

Full text

Abstract:

Improving efficiency of hydrogen cooling in cryogenic conditions is important for the wider applications of hydrogen energy systems. The approach investigated in this study is based on a Ranque-Hilsch vortex tube (RHVT) that generates temperature separation in a working fluid. The simplicity of RHVT is also a valuable characteristic for cryogenic systems. In the present work, novel shapes of RHVT are computationally investigated with the goal to raise efficiency of the cooling process. Specifically, a smooth transition is arranged between a vortex chamber, where compressed gas is injected, and the main tube with two exit ports at the tube ends. Flow simulations have been carried out using STAR-CCM+ software with the real-gas Redlich-Kwong model for hydrogen at temperatures near 70 K. It is determined that a vortex tube with a smooth transition of moderate size manifests about 7% improvement of the cooling efficiency when compared vortex tubes that use traditional vortex chambers with stepped transitions and a no-chamber setup with direct gas injection.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Vortex chamber"

1

Rajagopalan, Arun Gopal. "Geometric Modifications and their Impact on the performance of the Vortex Tube." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1457619638.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Yokomizu, Yasunobu, Toshiro Matsumura, Akiji Matsuda, and Hideyuki Ohno. "Dependence of arc interrupting capability on spatial distribution of airflow velocity in air-blast flat-type quenching chamber." IEEE, 2003. http://hdl.handle.net/2237/6793.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Криштоп, Ігор Володимирович, Игорь Владимирович Криштоп, and Ihor Volodymyrovych Kryshtop. "Вплив немодельних змін робочого колеса на характеристики вільновихрового насоса типу "Turo"." Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40401.

Full text

Abstract:

Вільновихрові насоси (ВВН) знайшли широке застосування в багатьох галузях промисловості для транспортування забруднених рідин, рідин з твердими включеннями і продуктів, що не повинні руйнуватись під час транспортування. Експлуатація цих насосів при перекачуванні в’язких рідин показала, що вони по ряду показників перевищують працездатність як лопатевих, так і об’ємних насосів. ВВН відрізняються нечутливістю до закупорювання та забезпечують перекачування легкоушкоджуваних продуктів з меншим відсотком їх руйнування в порівнянні з відцентровими насосами.

APA, Harvard, Vancouver, ISO, and other styles

4

Cherniak, Leonid Mykhailovych, Леонид Михайлович Черняк, Леонід Михайлович Черняк, О. В. Самков, and С. О. Фалько. "Вибір конструкції розпилювача рідини для вихрової камери." Thesis, Видавництво СумДУ, 2008. http://essuir.sumdu.edu.ua/handle/123456789/4214.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Фалько, С. О. "Дослідження залежності середнього об'ємно-поверхневого діаметру крапель у вихровій камері від технологічних параметрів." Thesis, Сумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/52150.

Full text

Abstract:

При застосуванні вихрового апарата з плівковим відцентровим розпилювачем рідин, може бути вирішене важливе науково-практичне завдання, яке полягає в підвищенні ефективності масообмінних процесів, що протікають при очищенні газів більшості шкідливих виробництв, що є найважливішим завданням природовикористання.

APA, Harvard, Vancouver, ISO, and other styles

6

DJOKO-SURONO-WIDODO, JOHANNES. "Etude de la combustion d'un moteur a allumage commande par controle de la turbulence externe." Paris 6, 1986. http://www.theses.fr/1986PA066631.

Full text

Abstract:

Etude de la combustion en melange pauvre avec rotation de la charge. Presentation des solutions pour limiter les effets defavorables: conduit d'admission helicoidal, canal d'admission secondaire, deflecteur mobile pilote, culasse multi-admissions (permeabilite de la culasse). L'augmentation de la turbulence donne des resultats positifs pour les points de fonctionnement a faible charge

APA, Harvard, Vancouver, ISO, and other styles

7

Motamed-Amini, Amir. "The behaviour and characteristics of a vortex diode in steam flows." Thesis, University of Liverpool, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328173.

Full text

Abstract:

The forward and reverse flow characteristics have been measured for Zobel type vortex diode with 19 mm throat diameter using superheated stea with inlet pressures up to 12 bar absolute, and exhausting into a subatmospheric condenser to achieve inlet to outlet pressure ratios up to 30 A discharge factor, Cf, which relates the measured mass flow rate to the theoretical mass flow rate of a critical flow through a comparable isentropic nozzle, has been used to describe the resistance of the diode. In the choked region of the forward and reverse flow, Cf has a constant value of 0.95 and 0.38 respectively. The critical pressure ratios in the forward and reverse flow are approximately 2 and 4. Repeating the tests using wet steam with known dryness fractions, ha shown separately the effects of wetness on the diode performance. The forward flow discharge factor in the choked condition is seen to be independent of dryness fraction, and found to lie between 0.9 and 1.0, which is similar to that found with superheated steam. The reverse flow discharge factor in the choked condition varied from about 0.4 for a dryness fraction of, 0.98, to 0.48 for a dryness fraction of 0.92. Excessive steam wetness (quality less than 0.93) in the reverse flow direction led to a build-up of water and when this was eventually swept through to the diode, the resistance was seen to fall substantially as th strong internal vortex was destroyed. This problem can be overcome in practice, however, by installing a water separator before the diode. Reverse flow characteristics of four 10 mm throat diameter Zobel typ vortex diodes have been measured using air with inlet pressure up to 31 bar absolute, and exhausting into atmosphere. The characteristics are seen to be similar to those found with superheated steam, with a value of Cf of 0.38. The effect of installing the four diodes in series was investigated. It was shown that by sharing the pressure drop between the diodes and moving the operating point into the incompressible regime, som of the high resistance performance could be recovered. A detailed study of vortex flow was carried out using a large vortex throttle with superheated steam as the working fluid. The static pressur distribution has been determined experimentally both across the vortex an along the axis of the chamber exit duct. The chamber internal wall temperatures have been obtained using insulated, flush-mounted thermocouples. The measurements enabled the velocity field to be calculated. The bulk of the internal vortex was found to have an exponer. of 0.69. It was found that the vortex throttle choked at an upstream to downstream pressure ratio of about 6 with corresponding Cf value of 0.28. The resistance of vortex chambers is known to be strongly influenced by the presence of reversed flow in the exit, due to vortex breakdown. Schlieren photography of the swirling exhaust flow was used to show that whilst vortex breakdown does occur, it can only do so after the flow has become subsonic downstream of the exit and cannot therefore influence the vortex chamber resistance.

APA, Harvard, Vancouver, ISO, and other styles

8

Роговий, Андрій Сергійович. "Розробка теорії та методів розрахунку вихорокамерних нагнітачів." Thesis, Харківський національний автомобільно-дорожній університет, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29275.

Full text

Abstract:

Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.05.17 – гідравлічні машини та гідропневмоагрегати. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. У дисертаційній роботі розв'язано науково-практичну проблему підвищення техніко-економічної ефективності гідравлічних і пневматичних нагнітачів, що перекачують рідини в несприятливих умовах експлуатації або гетерогенні середовища, за рахунок розробки і використання принципово нового типу струминних нагнітачів відцентрової дії. Їх конструкція не містить рухомих механічних частин, а також ущільнень, завдяки чому вони мають високі показники надійності і довговічності притаманні струминній техніці. Концепція нагнітачів базується на новому для струминних нагнітачів принципі – поєднанні позитивних якостей процесів у відцентрових і струминних нагнітачах та особливостях гідродинаміки обмежених обертових потоків. Використання вихорокамерних нагнітачів дозволяє підвищити енергоефективність гідравлічних і пневматичних систем, збільшити обсяг переміщуваних вантажів в гідравлічному і пневматичному трубопровідному транспорті, підвищити продуктивність праці і якість продукції, знизити її собівартість, поліпшити умови роботи. Розроблені нагнітачі є більш енергоефективними, внаслідок передачі енергії в полі відцентрової сили. Таким чином, створено наукові основи проектування струминних вихорокамерних нагнітачів для перекачування середовищ різних агрегатних станів.
Thesis for degree of Doctor of Science in Technique for speciality 05.05.17 – hydraulic machines and hydropneumatic units. – National Technical University "Kharkiv Polytechnical Institute", Kharkiv, 2017. In dissertational work the scientifically-practical problem of technical and economic efficiency increase of the hydraulic and pneumatic superchargers which are pumping over liquids in adverse service conditions or heterogeneous environments, at the expense of designing and use of essentially new type of jet superchargers of centrifugal action is solved. Their design does not contain mobile mechanical parts, and also sealing due to the fact that they have high indicators of reliability and durability inherent in jet technics. Conception of superchargers is based on a principle new to jet superchargers – unification of processes properties in centrifugal and jet superchargers and hydrodynamics features of the limited rotating streams. Use of vortex chamber superchargers allows to raise power efficiency of hydraulic and pneumatic systems, to increase volume of moved cargoes in hydraulic and pneumatic pipeline transport, to raise productivity of work and quality of production, to lower its cost price, to improve working conditions. The developed superchargers are more power effective, owing to transmission of energy in the field of centrifugal force. Thus, scientific bases of designing jet vortex chamber superchargers for transportation environments of different aggregation states are created.

APA, Harvard, Vancouver, ISO, and other styles

9

Роговий, Андрій Сергійович. "Розробка теорії та методів розрахунку вихорокамерних нагнітачів." Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29269.

Full text

Abstract:

Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.05.17 – гідравлічні машини та гідропневмоагрегати. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. У дисертаційній роботі розв'язано науково-практичну проблему підвищення техніко-економічної ефективності гідравлічних і пневматичних нагнітачів, що перекачують рідини в несприятливих умовах експлуатації або гетерогенні середовища, за рахунок розробки і використання принципово нового типу струминних нагнітачів відцентрової дії. Їх конструкція не містить рухомих механічних частин, а також ущільнень, завдяки чому вони мають високі показники надійності і довговічності притаманні струминній техніці. Концепція нагнітачів базується на новому для струминних нагнітачів принципі – поєднанні позитивних якостей процесів у відцентрових і струминних нагнітачах та особливостях гідродинаміки обмежених обертових потоків. Використання вихорокамерних нагнітачів дозволяє підвищити енергоефективність гідравлічних і пневматичних систем, збільшити обсяг переміщуваних вантажів в гідравлічному і пневматичному трубопровідному транспорті, підвищити продуктивність праці і якість продукції, знизити її собівартість, поліпшити умови роботи. Розроблені нагнітачі є більш енергоефективними, внаслідок передачі енергії в полі відцентрової сили. Таким чином, створено наукові основи проектування струминних вихорокамерних нагнітачів для перекачування середовищ різних агрегатних станів.
Thesis for degree of Doctor of Science in Technique for speciality 05.05.17 – hydraulic machines and hydropneumatic units. – National Technical University "Kharkiv Polytechnical Institute", Kharkiv, 2017. In dissertational work the scientifically-practical problem of technical and economic efficiency increase of the hydraulic and pneumatic superchargers which are pumping over liquids in adverse service conditions or heterogeneous environments, at the expense of designing and use of essentially new type of jet superchargers of centrifugal action is solved. Their design does not contain mobile mechanical parts, and also sealing due to the fact that they have high indicators of reliability and durability inherent in jet technics. Conception of superchargers is based on a principle new to jet superchargers – unification of processes properties in centrifugal and jet superchargers and hydrodynamics features of the limited rotating streams. Use of vortex chamber superchargers allows to raise power efficiency of hydraulic and pneumatic systems, to increase volume of moved cargoes in hydraulic and pneumatic pipeline transport, to raise productivity of work and quality of production, to lower its cost price, to improve working conditions. The developed superchargers are more power effective, owing to transmission of energy in the field of centrifugal force. Thus, scientific bases of designing jet vortex chamber superchargers for transportation environments of different aggregation states are created.

APA, Harvard, Vancouver, ISO, and other styles

10

Xavier, Pradip. "Investigation of flame stabilization mechanisms in a premixed combustor using a hot gas cavity-based flame holder." Thesis, Rouen, INSA, 2014. http://www.theses.fr/2014ISAM0016/document.

Full text

Abstract:

Cette thèse décrit l'étude d'une chambre de combustion innovante de type Trapped Vortex Combustor (TVC): ce concept utilise des cavités de gaz chauds pour stabiliser des flammes prémélangées pauvres. A partir d'une étude globale d'un point de fonctionnement instable, l'approche scientifique vise à différencier l'impact des différents mécanismes physiques. La structure de l'écoulement inerte est étudiée finement avant de mener une étude spatio-Temporelle sur un point de fonctionnement instable, en conditions réactives. L'analyse permet de comprendre les interactions entre la structure de la flamme, la topologie de l'écoulement et l'acoustique du brûleur. Différents mécanismes pilotant l'apparition d'instabilités de combustion sont mis en évidence, et des recommandations sont fournies afin de les supprimer. Un vérification a posteriori permet de valider l'importance de ces mécanismes, notamment grâce à la détermination de diagrammes de stabilité de flamme
This thesis describes the investigation of an innovative trapped vortex combustor (TVC): this concept uses recirculating hot gas flow trapped in cavities to stabilize lean main flames. Based on a global investigation of an unstable operating condition, the scientific strategy aims to treat separately the different physical mechanisms. The inert flow structure is analyzed prior to leading a spatio-Temporal study on an unstable mode. This investigation aims to understand the flaine-Flow-Acoustic interactions in the combustor. Several mechanisms piloting combustion instabilities are highlighted, and recommandations are provided in order to suppress them. An a posteriori check validate the preponderance of these mechanisms, in particular with the determination of stability flaine diagrams

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Vortex chamber"

1

(Editor), Ian Derbyshire, ed. Politics in South Africa: From Vorster, to De Klerk (Chambers Political Spotlights). W & R Chambers Ltd, 1992.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Bluestein, Howard B. Tornadoes and Their Parent Convective Storms. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780190676889.013.15.

Full text

Abstract:

In the past four decades much has been discovered about tornado formation and structure from observations, laboratory models, and numerical-simulation experiments. Observations include nearby movies and photographs of tornadoes, fixed-site, airborne, and ground-based mobile Doppler radar remote measurements, and in situ measurements using instrumented probes. Laboratory models are vortex chambers and numerical-simulations are based on the governing fluid dynamical equations. However, questions remain: How and why do tornadoes form? and How does the wind field associated with them vary in space and time? Recent studies of tornadoes based on observations, particularly by radar, are detailed. The major aspects of numerically simulating a tornado and its formation are reviewed, and the dynamics of tornado formation and structure based on both observations and laboratory and numerical-simulation experiments are described. Finally, future avenues of research and suggested instrument development for furthering our knowledge are discussed.

APA, Harvard, Vancouver, ISO, and other styles

3

Bluestein, Howard B. Tornadoes and Their Parent Convective Storms. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780190699420.013.15.

Full text

Abstract:

In the past four decades much has been discovered about tornado formation and structure from observations, laboratory models, and numerical-simulation experiments. Observations include nearby movies and photographs of tornadoes, fixed-site, airborne, and ground-based mobile Doppler radar remote measurements, and in situ measurements using instrumented probes. Laboratory models are vortex chambers and numerical-simulations are based on the governing fluid dynamical equations. However, questions remain: How and why do tornadoes form? and How does the wind field associated with them vary in space and time? Recent studies of tornadoes based on observations, particularly by radar, are detailed. The major aspects of numerically simulating a tornado and its formation are reviewed, and the dynamics of tornado formation and structure based on both observations and laboratory and numerical-simulation experiments are described. Finally, future avenues of research and suggested instrument development for furthering our knowledge are discussed.

APA, Harvard, Vancouver, ISO, and other styles

4

E, Kelly R., and United States. National Aeronautics and Space Administration., eds. Effect of density gradients in confined supersonic shear layers. [Washington, DC: National Aeronautics and Space Administration, 1994.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Vortex chamber"

1

Verma, Sumit, and R. Panneer Selvam. "Effect of Height of the Tornado Chamber on Vortex Touchdown." In Advances in Fluid Dynamics, 495–507. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4308-1_38.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Athar, Mohammad, and Shivani Srotriya. "Velocity Distribution in Vortex Chamber at High Water Abstraction Ratio." In Hydrologic Modeling, 459–73. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5801-1_32.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Rogovyi, Andrii, Volodymyr Korohodskyi, Artem Neskorozhenyi, Iryna Hrechka, and Serhii Khovanskyi. "Reduction of Granular Material Losses in a Vortex Chamber Supercharger Drainage Channel." In Lecture Notes in Mechanical Engineering, 218–26. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06044-1_21.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Rogovyi, Andrii, Sergey Khovanskyy, Irina Grechka, and Jan Pitel. "The Wall Erosion in a Vortex Chamber Supercharger Due to Pumping Abrasive Mediums." In Lecture Notes in Mechanical Engineering, 682–91. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22365-6_68.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

"Sediment removal efficiency of a deep vortex chamber sediment extractor." In Environmental Hydraulics, Two Volume Set, 1105–10. CRC Press, 2010. http://dx.doi.org/10.1201/b10553-187.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

OGAWA, AKIRA. "CONCENTRATION DISTRIBUTIONS OF THE FINE SOLID PARTICLES ON THE TURBULENT ROTATIONAL AIR FLOW IN THE VORTEX CHAMBER." In Frontiers of Fluid Mechanics, 1075–80. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-08-036232-8.50191-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Vatistas, G. H., S. Tzirtziganis, Z. Jiang, and S. Lin. "THE AERODYNAMIC RESISTANCE OF VORTEX CHAMBERS." In Frontiers of Fluid Mechanics, 1045–49. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-08-036232-8.50186-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

"* ** Fig. 39 Cyclone-type homogenizer mixing chamber. (From Ref. 41.) chamber. The symmetry axes of these entry ports are perpendicular to the symmetry axis of the interaction chamber. This design is presented in Fig. 40, with only four entry ports. This machine is called Novamix® (a registered name for Micro Vesicular Sys-tems). It was originally designed to process and produce nonphospholipid lamellar mi-crostructures or lipid vesicles. The lipid vesicles are composed of two immiscible aqueous and lipid phases. The lipid phase consists, generally, of solid polyoxyethylene-derived amphiphiles that form micelles in aqueous media. Under the proper mixing conditions, i.e., a combination of shear, heat, and turbulence, followed by appropriate cooling, the micelles of these types of lipids fuse to form lipid vesicles. The two phases are metered carefully and heated in separate reservoirs and finally pumped to the interaction chamber for pro-cessing. The interaction chamber and pump heads are confined in an insulated com-partment that is maintained at the required temperature for the production of the lipid vesicles. The outlet is attached to a chilling device that cools the product at the required rate [43]. The flow pattern is similar to that of a cyclone, i.e., the flow of liquid is in a vertically positioned rotating cylinder along its vertical axis. The streamlines are con-centric circles with their radii decreasing toward the center of the cylinder. The de-crease is a function of cylinder radius, flow rate of fluid (speed of rotation), and other parameters like viscosity, density, and surface tension of the formulation. In curved type of flow with changing radii, there exists a pressure gradient, i.e. dPIdr = V /r (8) where P = pressure; r = vessel (interaction chamber) radius; V = tangential linear velocity; and p= the liquid density. Since the change in pressure is positive for a positive radius change, the pressure at successive points increases from the concave to the convex side of the streamline [39]. The exact change in pressure depends on the variation in tangential linear velocity, which is proportional to the speed of the rotation and the ra-dius. The flow pattern in the interaction chamber is neither a free vortex, due to the presence of an initial momentum from the pumps, nor a forced vortex, for the stream-." In Pharmaceutical Dosage Forms, 368–69. CRC Press, 1998. http://dx.doi.org/10.1201/9781420000955-55.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Vortex chamber"

1

Jawarneh, Ali, and Georgios Vatistas. "Vortex Chamber Flows." In 2nd International Energy Conversion Engineering Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2004. http://dx.doi.org/10.2514/6.2004-5620.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Nakashima, Masahiro, Tsutomu Nozaki, and Takahide Tabata. "Flow in Vortex Chamber Oscillation Device." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45134.

Full text

Abstract:

This paper describes about the vortex chamber oscillation device. The flow mechanism of the fluidics is applied in this device. The water jet issuing from this device oscillates by itself. By using the circular device having the diameter of 48mm and various elliptic devices with the major axis from 52mm to 60mm, the swinging flow has been observed by the high-speed camera. Next, the high-speed camera also has captured the flow feature inside of the vortex chamber oscillation devices. The image obtained from the high-speed camera has been processed by the PIV-method. The results of the image processing have been presented as the velocity vector diagrams and vorticity contour map. And the angle of sprinkled water has been also measured by means of the frame overlapping method. By using these results, the effects of the geometrical configuration of the vortex chamber on the oscillating phenomena have been investigated.

APA, Harvard, Vancouver, ISO, and other styles

3

KREPEC, T., and C. KWOK. "Vortex flow patterns in a cylindrical chamber." In 4th Joint Fluid Mechanics, Plasma Dynamics and Lasers Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1986. http://dx.doi.org/10.2514/6.1986-1098.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

VATISTAS, G., S. LIN, and C. KWOK. "Recent findings on confined vortex chamber flows." In 18th Fluid Dynamics and Plasmadynamics and Lasers Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1985. http://dx.doi.org/10.2514/6.1985-1559.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Duarte, C. A. R., F. J. Souza, and V. F. Santos. "Mitigating elbow erosion with a vortex chamber." In THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer. Connecticut: Begellhouse, 2015. http://dx.doi.org/10.1615/ichmt.2015.thmt-15.1280.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Jahangirian, S., M. Abarham, A. Ghafourian, and M. H. Saidi. "Effect of Vortex Flow on Heat Transfer to Combustion Chamber Wall." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59550.

Full text

Abstract:

A new experimental facility was designed, fabricated and tested to model and study the effect of bidirectional swirl flow on the rate of heat transfer to combustion chamber walls in many applications. Heat transfer to combustion chamber walls is an unwanted phenomenon. Reduction of this heat transfer can result in time and cost saving methods in design and fabrication of combustion chambers. The experimental study was performed by using propane and air with oxygen as fuel and oxidizer respectively. The location of injection ports and geometry of combustion chamber are flexible and could be varied. Tests were performed with different mass flow rates of fuel and oxidizer. For the same flow rates and with the presence of bidirectional flow, a wall temperature reduction of up to 50% was observed. In cases where only some of the oxidizer was injected from the chamber end to generate the bidirectional swirl flow, highest efficiency and lowest wall temperature existed. This can be due to better mixing of fuel and oxidizer and absence of hot spots in the combusting core. Further development of this technique enables combustion chamber manufacturers in a wide spectrum of industries such as gas turbine manufacturers to use less expensive and more available material in their production of combustors.

APA, Harvard, Vancouver, ISO, and other styles

7

Dekterev, A. A., V. A. Kuznetsov, E. S. Tepfer, and N. S. Chernetskaya. "Simulation of aerodynamics of a four-vortex combustion chamber." In THE 1ST INTERNATIONAL CONFERENCE ON PHYSICS AND APPLIED PHYSICS (THE 1ST ICP&AP) 2019: Fundamental and Innovative Research for Improving Competitive Dignified Nation and Industrial Revolution 4.0. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0000957.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Chiaverini, Martin, Matthew Malecki, J. Sauer, William Knuth, and Christopher Hall. "Vortex Combustion Chamber Development For Future Liquid Rocket Engine Applications." In 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-4149.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Anderson, Mark, Rene Valenzuela, Riccardo Bonazza, Martin Chiaverini, and Craig Rom. "Vortex Chamber Flow Field Characterization for Gelled Propellant Combustor Applications." In 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-4474.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sivykh, Gennadiy F., and Nadezhda I. Fainer. "The simulation of evolution of crystal particle in vortex chamber." In 2016 13th International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering (APEIE). IEEE, 2016. http://dx.doi.org/10.1109/apeie.2016.7806482.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!