Rozprawy doktorskie na temat „Water tunnel experiments”
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Munro, Cameron. "Water tunnel validation and experiments at high angles of attack for aircraft conceptual design /". Linköping : Univ, 2003. http://www.bibl.liu.se/liupubl/disp/disp2002/tek847s.pdf.
Pełny tekst źródłaGluck, Jeffrey Weston, i Jeffrey Weston Gluck. "Water Tunnel Experiments on Span-wise Variation of Laminar Separation Bubbles for Swept and Unswept Wings using Particle Image Velocimetry". Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/621851.
Pełny tekst źródłaCiccone, Brianne N. "Modeling of Evaporative Losses in Industrial Pasteurization". Youngstown State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1339587036.
Pełny tekst źródłaRolland, Romain. "Caractérisation de l'interaction fluide-structure d'un assemblage de coeur de réacteur sous forçage sismique". Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAE005.
Pełny tekst źródłaWithin the framework of safety studies, it is necessary to have validated models of the fluid forces exerted on fuel assemblies in the event of an earthquake. In the PWR (Pressurized Water Reactor) technology used in France, fuel assemblies are made of cylindrical rods bundles arranged in a square array and subjected to an axial flow. In case of an earthquake, these assemblies are subjected to lateral oscillations. These vibrations can lead to the deformation of the assemblies. Test campaigns on real fuel assemblies have been carried out and have revealed the existence of dissipative fluid forces whose evolution and spatial distribution are still poorly documented. The objective of the present work is to contribute to the description of these forces in dynamics. The reference model for the description of the dynamics of slender structures under axial flow is the TLP model (Taylor-Lighthill-Païdoussis). In the literature this model has been validated for a structure very close to the cylinder bundle. Static studies performed on a cylinder in a bundle have shown a non-negligible influence of the extremities on the forces exerted by the fluid on the structure. The literature proposes few validation cases of the TLP model for more complex structures close to a fuel assembly. In order to evaluate the capacity of the model to describe the fluid forces exerted on a structure closer to a fuel assembly, a new test bench was designed and put into service. This test rig allows to laterally oscillate a cylinder bundle 5 x 5 with grids at each end in an axial flow. Force measurements at each grid give access to the resultant force of the structure. A numerical model completes this experimental approach and gives access to the distribution of forces in the structure. The forces obtained experimentally seem to indicate an important effect of the grids. The forces obtained from the simulations confirm the observations made on a bundle of cylinders and bring new elements on the distribution of the local forces as well as the influence of the extremities
Bassan, Rodrigo Augusto [UNESP]. "Visualização experimental de escoamentos no interior de canais munidos de protuberâncias parietais". Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/136024.
Pełny tekst źródłaNeste trabalho realiza-se um estudo do escoamento no interior de um canal com protuberâncias parietais para números de Reynolds menores que 103. Os ensaios foram conduzidos em um túnel hidrodinâmico vertical. Perfis de velocidade na seção de testes, assim como a intensidade turbulenta do túnel e emissões de vórtices, foram adquiridos por meio da anemometria de fio/filme quente. Técnicas de visualização de escoamentos, também, foram empregadas em diferentes circunstâncias, com três objetivos fundamentais: como ferramenta de análise qualitativa, na identificação de padrões de escoamento; como mecanismo de apoio à realização de medidas experimentais, para auxiliar no correto posicionamento de sondas anemométricas; e, finalmente, como instrumento complementar de análise, para facilitar a interpretação de resultados. Em todos os casos o escoamento foi tratado estritamente bidimensional. Outro fator importante deste trabalho refere-se a reconstrução do túnel hidrodinâmico vertical, o qual situa-se no Laboratório de Visualização de Escoamentos do Departamento de Engenharia Mecânica da UNESP - campus de Ilha Solteira; que com grande empenho dos Professores Edson Del Rio Vieira, Sergio Said Mansur, Técnicos do laboratório e com uma pequena contribuição de minha parte pode-se finalizar esse projeto
In the present work is accomplished a study of the flow within a channel with parietal 3 protuberances for Reynolds numbers less than 10 . The tests were conducted in a hydrodynamic tunnel vertical. Velocity profiles in the test section, as well as the turbulent intensity of the tunnel, vortex emissions were acquired through anemometry wire / hot film. Flow visualization techniques were employed as a tool for qualitative analysis, in the identification of flow patterns, as qualitative analytical tool to identify flow patterns; as a mechanism to support the implementation of experimental measurements, to assist in the correct positioning of airspeed probes; and finally as an additional tool of analysis, to facilitate interpretation of results. In every case the disposal was treated dimensional strictly. Another important factor of this work refers to the reconstruction of vertical hydrodynamic tunnel, which is located in the Flow View Laboratory, Department of Mechanical Engineering of UNESP - campus of Single Island; that with great commitment of Teachers Edson Vieira Del Rio, Sergio Said Mansur, lab technicians and a small contribution from me you can finish this project
Bassan, Rodrigo Augusto. "Visualização experimental de escoamentos no interior de canais munidos de protuberâncias parietais /". Ilha Solteira, 2015. http://hdl.handle.net/11449/136024.
Pełny tekst źródłaCo-orientador: Edson Del Rio Vieira
Banca: André Luiz Seixlack
Banca: Odenir de Almeida
Resumo: Neste trabalho realiza-se um estudo do escoamento no interior de um canal com protuberâncias parietais para números de Reynolds menores que 103. Os ensaios foram conduzidos em um túnel hidrodinâmico vertical. Perfis de velocidade na seção de testes, assim como a intensidade turbulenta do túnel e emissões de vórtices, foram adquiridos por meio da anemometria de fio/filme quente. Técnicas de visualização de escoamentos, também, foram empregadas em diferentes circunstâncias, com três objetivos fundamentais: como ferramenta de análise qualitativa, na identificação de padrões de escoamento; como mecanismo de apoio à realização de medidas experimentais, para auxiliar no correto posicionamento de sondas anemométricas; e, finalmente, como instrumento complementar de análise, para facilitar a interpretação de resultados. Em todos os casos o escoamento foi tratado estritamente bidimensional. Outro fator importante deste trabalho refere-se a reconstrução do túnel hidrodinâmico vertical, o qual situa-se no Laboratório de Visualização de Escoamentos do Departamento de Engenharia Mecânica da UNESP - campus de Ilha Solteira; que com grande empenho dos Professores Edson Del Rio Vieira, Sergio Said Mansur, Técnicos do laboratório e com uma pequena contribuição de minha parte pode-se finalizar esse projeto
Abstract: In the present work is accomplished a study of the flow within a channel with parietal 3 protuberances for Reynolds numbers less than 10 . The tests were conducted in a hydrodynamic tunnel vertical. Velocity profiles in the test section, as well as the turbulent intensity of the tunnel, vortex emissions were acquired through anemometry wire / hot film. Flow visualization techniques were employed as a tool for qualitative analysis, in the identification of flow patterns, as qualitative analytical tool to identify flow patterns; as a mechanism to support the implementation of experimental measurements, to assist in the correct positioning of airspeed probes; and finally as an additional tool of analysis, to facilitate interpretation of results. In every case the disposal was treated dimensional strictly. Another important factor of this work refers to the reconstruction of vertical hydrodynamic tunnel, which is located in the Flow View Laboratory, Department of Mechanical Engineering of UNESP - campus of Single Island; that with great commitment of Teachers Edson Vieira Del Rio, Sergio Said Mansur, lab technicians and a small contribution from me you can finish this project
Mestre
Albrektsson, Joakim. "Durability of fire exposed concrete : Experimental Studies Focusing on Stiffness & Transport Properties". Licentiate thesis, KTH, Betongbyggnad, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168386.
Pełny tekst źródłaQC 20150603
Briançon-Marjollet, Laurence. "Couches-limites, germes et cavités en interaction : étude physique". Grenoble 1, 1987. http://www.theses.fr/1987GRE10119.
Pełny tekst źródłaRouland, Eric. "Etude et développement de la technique de vélocimétrie par intercorrélation d'images de particules. Application aux écoulements en tunnel hydrodynamique". Rouen, 1994. http://www.theses.fr/1994ROUES078.
Pełny tekst źródłaKushwaha, Pushpendra Kumar. "Experimental and Numerical Study on Boundary Layer Growth in Wind Tunnel". Thesis, 2017. http://ethesis.nitrkl.ac.in/8768/1/2017_MT_PK_Kushwaha.pdf.
Pełny tekst źródłaLai, Yuan-wei, i 賴元偉. "Experimental study on a round tube jet in a vertical water tunnel". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/75575402485483606483.
Pełny tekst źródła國立臺灣科技大學
機械工程系
98
The purpose of this research is to study the flow fields caused by a round tube jet in a crossflow within the near-wake region. The experiments of a crossflow passing around a cylindrical tube and a round tube jet under different static pressures are observed by using flow visualization and Particle Image Velocimeter (P.I.V.) techniques. Crossflow is produced by a vertical water tunnel, with ReD = 250 1080. The jet is supplied and controlled by pumping water through a rotameter into the cylindrical tube, with Rej = 260 ~ 2200. Experimental observations on crossflow passing around a cylindrical tube are divided into vertical longitudinal and cross sections. Vertical longitudinal section of the flow field is located at Z/D = 0. When ReD increases, the bifurcation line of downwash barely changes, but the region of the lee-side of cylindrical tube close to the tip has some variations. Vertical cross sections of the flow field are located at X/D = 0, -2.5, -5, -10, respectively. At X/D = 0, ambient fluid around the cylindrical tube tends to move toward the center region of the lee-side of cylindrical tube. There is no vortex observed. At X/D = -2.5, there is a stronger shear layer to confine the wake region. Wake tends to move toward the central region of the lee-side of the cylindrical tube. At X/D = -5, low ReD case shows vortices are created periodically and switch between left and right. For high ReD cases, periodical appearing vortices seem to be disturbed by stronger downwash crossflow. At X/D = -10, both high and low ReD cases show vortices appear periodically and interchange between left and right. Wakes move in S-shape pattern. For experiments of various Rej at two different water levels in stationary fluid. When Rej < 1330, jet breakdown position in the high water level is more close to the jet nozzle source, but when Rej > 1330, the comparison results are reversed. When Rej = 1330, jets in the low and the high water levels show a similar breakdown point position.
Prakash, Rishabh. "Experimental Analysis on Boundary Layer Growth Using Varying Configuration of Roughness Blocks and Spires in Wind Tunnel". Thesis, 2016. http://ethesis.nitrkl.ac.in/8515/1/2016_MT_711CE4099_Rishabh_Prakash.pdf.
Pełny tekst źródłaHo, Po-Ching, i 何柏慶. "Experimental Study on Natural Convection Heat Transfer of Indirect Water Cooling System in a Semicircular Tunnel". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/36892807398499978848.
Pełny tekst źródła國立臺灣大學
機械工程學研究所
95
In the large underground cables tunnel, the part of the electric energy carried by the cables will dissipate and transform into heat. Therefore, an effective cooling system is demanded to take the heat away for decreasing the air temperature in the tunnel as well as keeping a safe and pleasant environment. In this work a semicircular tunnel were used as the main body to simulate the underground tunnel, within which an electrical heater could generate heat. Four PE water tubes were set to perform indirect water cooling. The air temperature distribution in the tunnel, the temperature change on the water tubes and the heater were all measured and analyzed. Both the non-dimensional variables Nusselt number, Nu, and Rayleigh number, Ra, were also calculated. The effect of the cold water flow rate(8LPM, 12LPM and 16LPM), number of cold water tube(four and single), the relative positions of the single heater and cold water tubes, and the surface temperature of the heater(from 100℃ to 250℃)were discussed. The whole study was conducted for the Rayleigh number between 4.41 x 104 and 8.19 x 104. In the experiment of four cold water tubes, the result shows that the larger the flow rate of cold water is, the larger the axial temperature gradient in the front section of the tunnel gets. However, the uniform air temperature in axial direction was obtained when the flow rate of cold water getting smaller. By the temperature distribution profile, a local relative high and low temperature area near the upper-right and lower-right of the semicircular wall of the tunnel can be found. In each cross-section in the axial direction, is maximized and minimized with the water flow rate at 16LPM and 8LPM, respectively, while rises in accordance with the increasing water flow rate. In the study of single heater and cold water tube, the tunnel temperature rises sharply at first and becomes uneven with increasing surface temperature of heater. rises to 5.2x104 from 4.7x104 when the surface temperature of heater is increased from 100℃ to 150℃. However, a large change in Rayleigh number(from 4.7 x 104 to 5.2 x 104) only makes small change in (from 10.1 to 10.3). If the surface temperature of heater is raised to the range of 200℃ and 250℃, increases obviously. In addition, highest and can be obtained by arranging the cold water tube directly above the heater.
Yeh, Chung-hsuan, i 葉仲軒. "Experimental Study of Combined Effect of Water Spray System and Longitudinal Ventilation in Full-Scale Tunnel Fires". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/46300489845825602373.
Pełny tekst źródła國立高雄第一科技大學
環境與安全衛生工程研究所
103
An experimental study of tunnel fire with both longitudinal ventilation and water spray systems were conducted in Taiwan. The tunnel was 88 m long , 10 m wide and 8 m high. The fire used was heptane and poured in 1, 4 and 9 m2 fuel pan, Equivalent to 2.5, 10 MW and 25 MW. The ventilation system can produce cross-sectional air flow with velocity of 1.5 m/s or 2.5 m/s. The water spray system can produce distributed water with volume per minute and unit area of 6 L/min∙m2 . Four fire scenarios were applied, free burning, with water spray system, with ventilation system, and with both ventilation and water spray system. The data show that the ventilation system can strongly decreased the temperature and heat flux downstream of fires, and can make a safe environment for evacutee and fire fighters. The water spray system even enhanced the performance of ventilation system. Additionally, the ventilation can reduce the temperature of tunnel structure, although the ceiling temperature downstream of the fires was still high. The water spray system can help decrease the downstream temperature of tunnel structure. Furthermore, the ventilation system can prevent the flame spread through vehicles.
Yang, Hong-Huei, i 楊鴻輝. "Experimental Study on Natural Convection Heat Transfer of Indirect Water Cooling System with Single Linear Heat Source in a Circular Tunnel". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/52172077491193031459.
Pełny tekst źródła臺灣大學
機械工程學研究所
98
Natural convection heat transfer in a circular enclosure has been developed for a long time. One of many applications is cooling system of underground cable tunnels. For Taiwan, We lack for experiences of building underground cable tunnels. We need more literatures to provide a lot of information for structuring underground cable tunnels. In underground cable tunnels, a part of electric energy is dissipated by electrical cable so the cooling-water system is needed. In this research the circular tunnel made of concrete was used to simulate underground cable tunnels. Tube-shaped heater was simulated electrical cables. Five pipes made of stainless structured indirect cooling water system. The purpose of this research is to optimize cooling efficiency. The effect of the position of cooling water pipes(A,B,C,D,E), the angle of the heat source(30°,60°,90°,120°), the power of the heat source(1300, 975, and 650 W), the flow rate of the cooling water(4, 8, 12, and 15LPM), the number of the cooling water pipes were discussed. T-type Thermocouples installed on cross section of downstream section of underground cable tunnel to measure air temperature. In the experiment of single pipe of cooling water, the smallest distance between single pipe of cooling water and heater was the highest efficiency but local relative high temperature was higher than any other case. When the position of single pipe of cooling water is fixed, the power of heater didn’t influence the distribution of temperature of air significantly. The average Temperature profile was like a parabolic line when the flow rate of cooling water increased from 4 LPM to 15 LPM and strong fluctuations of temperature of air occurred on the section of entrance of the tunnel as the flow rate of cooling water more than 12 LPM. The level of heat source was lower then the temperature of air was more uniform. In the experiment of number of pipes of cooling water, the result shows that more pipes of cooling water were activity then the temperature of cross section of the tunnel is lower due to increase the total area of cooling water pipes. The best layout is that Multi-pipes are arranged on the top of the tunnel and heater is the same but below the pipes.
Lartiga, Catalina. "Development of a rig and testing procedures for the experimental investigation of horizontal axis kinetic turbines". Thesis, 2012. http://hdl.handle.net/1828/3955.
Pełny tekst źródłaGraduate