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Thematische Bibliographien / Inlet shaft

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Zeitschriftenartikel

Auswahl der wissenschaftlichen Literatur zum Thema „Inlet shaft“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 11. Februar 2022

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Zeitschriftenartikel zum Thema "Inlet shaft"

1

Yang, Qinghua, and Qian Yang. "Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts." Water Science and Technology 83, no. 9 (2021): 2259–70. http://dx.doi.org/10.2166/wst.2021.137.

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Abstract The baffle drop shaft is widely used in deep tunnel drainage systems due to its fine applicability and high energy dissipation. To fully study the turbulence characteristics and energy dissipation mechanism of baffle drop shafts, a 1:25 scale physical model test and a numerical simulation based on the Realizable k-ε model and Volume of Fluid (VOF) method were performed. The results showed that a baffle spacing that is too dense or too sparse is not conducive to energy dissipation and discharge. The minimum baffle spacing is the optimal structural design at the design flow rate when th

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2

Sun, Jianchun, Heng Zhang, Muyan Huang, Qianyang Chen, and Shougen Chen. "Reasonable Paths of Construction Ventilation for Large-Scale Underground Cavern Groups in Winter and Summer." Sustainability 10, no. 10 (2018): 3768. http://dx.doi.org/10.3390/su10103768.

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Forced ventilation or newly built vertical shafts are mainly used to solve ventilation problems in large underground cavern groups. However, it is impossible to increase air supply due to the size restriction of the construction roadway, resulting in ventilation deterioration. Based on construction of the Jinzhou underground oil storage project, we proposed both a summer ventilation scheme and winter ventilation scheme, after upper layer excavation of the cavern is completed and connected with the shaft. A three-dimensional numerical model validated with field test data was performed to invest

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3

Fernandes, João, and Ricardo Jónatas. "Experimental flow characterization in a spiral vortex drop shaft." Water Science and Technology 80, no. 2 (2019): 274–81. http://dx.doi.org/10.2166/wst.2019.274.

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Abstract Connecting storm-sewers located at rather different elevations may be made with vortex drop shafts in which the energy dissipation is made by the friction between the vertical shaft and the flow and downstream by the impinging jet in a dissipation chamber. Following the first model design in the 1940s, different types of vortex drop shafts have been developed. One of the most used type is the so-called spiral vortex drop shaft developed to work in supercritical flow with good performance in both energy dissipation and space constrains. In this paper, an experimental flow characterizat

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4

Alpan, K., and W. W. Peng. "Suction Reverse Flow in an Axial-Flow Pump." Journal of Fluids Engineering 113, no. 1 (1991): 90–97. http://dx.doi.org/10.1115/1.2926503.

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Experiments are carried out to determine the effects of different inlet geometries on the onset of suction recirculation and its associated power consumption in an axial-flow pump. The critical flow rate is determined by both the “string” visual technique and “pressure” method. The results are correlated with the inlet area and flow velocity distribution upstream of the impeller. Four different conical covers matching the impeller leading edge are employed to cover the impeller inlet completely or partially. Covering the inlet area reduces the critical flowrate corresponding to the onset of su

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5

Yao, Zhishu, Ping Zhang, Hua Cheng, Weipei Xue, and Xiang Li. "Testing of a Dual-Steel-Plate-Confined High-Performance Concrete Composite Shaft Lining Structure and Its Application." Applied Sciences 10, no. 8 (2020): 2938. http://dx.doi.org/10.3390/app10082938.

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To address the support problem of large-diameter drilling shafts in the west area of Zhangji coal mine, a thinner shaft lining structure composed of double layers of steel plate and high-performance concrete is proposed herein. Firstly, a series of tests of high-performance concrete preparation were carried out, and the optimized mix ratio of pumping concrete with 60–70 MPa strength for shaft lining of the drilled shaft was obtained. Then, shaft lining models were designed according to the similarity theory, and the mechanical properties of the shaft lining were experimentally studied by loadi

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6

Yablokov, Aleksey, Ivan Yanin, Aleksey Danilishin, and Anatoliy Zuev. "Ansys CFX numerical study of stages centrifugal compressor with low-flow rate coefficient." MATEC Web of Conferences 245 (2018): 09002. http://dx.doi.org/10.1051/matecconf/201824509002.

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The article presents results of applying the methods of computational fluid dynamics for model low-flow rate stages of centrifugal compressors with flow rate coefficient F = 0.028. The computational domain of a model centrifugal compressor for CFD-simulation consists of the following elements: inlet chamber, impeller, vaneless diffuser, return channel, outlet chamber, shaft seal labyrinth, front and back shroud leakage. Full-scale experimental studies were conducted to model stage 028 in air at an inlet pressure of p* = 1 atm. Numerical research for stage 028 held with flow rate coefficient F=

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7

Liu, Peng, Zheng Lin Liu, Sheng Dong Zhang, Bo Qin, and Liang Zhao. "Research on Performance of Stern Shaft Mechanical Seal Based on FLUENT." Advanced Materials Research 744 (August 2013): 31–34. http://dx.doi.org/10.4028/www.scientific.net/amr.744.31.

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Reasonable assumptions and boundary conditions, the application of CFD method of mechanical seal ring structure analysis and thermal-structural coupling analysis, research on the temperature field and the pressure field distribution of the water flim between moving and the stationary ring . Comparing the change of the maximum temperature and the water film bearing capacity though different inlet velocity and different speed under, known as the fluid inlet speed increases, the maximum temperature of the sealing water film gradually decreased, the bearing capacity gradually increased; as the ste

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8

Yang, Chun Xia, Meng Tian Lu, Yuan Zheng, Xiao Qing Tian, and Yu Quan Zhang. "Inlet Passage’s Development and Optimization of New Tidal Unit-Shaft Tubular Turbine." Applied Mechanics and Materials 607 (July 2014): 312–16. http://dx.doi.org/10.4028/www.scientific.net/amm.607.312.

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A new type of tidal unit-vertical shaft tubular turbine is designed with high efficiency, large flow rate and low water head ,which has large power under the 2~3 meters water head. According to the data of the being installed tidal units and principles of tubular turbine’s design, the high efficiency vertical shaft tubular turbine was designed under large discharge and low head, which was suitable for the tidal power station. The design also considered the requirements of turbine’s size and the details of flow through the whole flow passage were attained. The turbine’s property was predicted b

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9

Sanaye, Sepehr, and Salahadin Hosseini. "Off-design performance improvement of twin-shaft gas turbine by variable geometry turbine and compressor besides fuel control." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 7 (2019): 957–80. http://dx.doi.org/10.1177/0957650919887888.

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A novel procedure for finding the optimum values of design parameters of industrial twin-shaft gas turbines at various ambient temperatures is presented here. This paper focuses on being off design due to various ambient temperatures. The gas turbine modeling is performed by applying compressor and turbine characteristic maps and using thermodynamic matching method. The gas turbine power output is selected as an objective function in optimization procedure with genetic algorithm. Design parameters are compressor inlet guide vane angle, turbine exit temperature, and power turbine inlet nozzle g

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10

Yang, Peiji, Qi Yuan, and Runlin Chen. "Experimental research on the tilting pad bearing under the high temperature of inlet oil." Industrial Lubrication and Tribology 70, no. 6 (2018): 935–41. http://dx.doi.org/10.1108/ilt-01-2017-0021.

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Purpose The purpose of this study is to analyze the influence of high-temperature inlet oil on the comprehensive performance of tilting-pad bearing. Design/methodology/approach Taking a tilting-pad bearing under high temperature of inlet oil in a natural gas compressor as an example, the experimental system was developed for the tilting-pad bearing applied in a real machine, and the experiment was performed. The bearing lubricating properties under different high temperatures of inlet oil were obtained, including oil film thickness on the pivot, temperature rise and the shaft vibration values

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