Log in

Relevant bibliographies by topics / Water tunnel experiments / Journal articles

To see the other types of publications on this topic, follow the link: Water tunnel experiments.

Journal articles on the topic 'Water tunnel experiments'

Author: Grafiati

Published: 1 June 2024

Last updated: 31 July 2025

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

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Water tunnel experiments.'

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.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Huang, Wei, Mingtao Hu, Rubin Wang, Jianping Zhang, and Weiya Xu. "Study on Large-Scale Geomechanical Experiments on Tunnel External Water Pressure." Water 17, no. 7 (2025): 913. https://doi.org/10.3390/w17070913.

Full text

Abstract:

High external water pressure poses significant challenges to the construction of long-distance water diversion tunnels under complex geological conditions. This study developed a large-scale geomechanics model to explore the effects of tunnel depth, water head, and drained conditions on external water pressure, focusing on the Songlin Tunnel in the Central Yunnan Water Diversion Project. The results show that external water pressure is most affected by water head and tunnel depth, particularly under undrained conditions. At water heads over 160 m, the external water pressure significantly decr

APA, Harvard, Vancouver, ISO, and other styles

2

Zhukov, S. A., M. A. Bubnov, and M. S. Naumov. "Modeling of the rock mass deformations effect on deep metro main line tunnels." Mining Industry Journal (Gornay Promishlennost), no. 5S/2024 (December 6, 2024): 190–96. https://doi.org/10.30686/1609-9192-2024-5s-190-196.

Full text

Abstract:

The article discusses the effects of soil mass movement on deep metro main line tunnels. The study is based on the data obtained as part of a field survey of a tunnel section that was exposed to a non-routine event. Displacements of the soil mass surrounding the tunnel during its operation may occur due to disturbance of the groundwater mode caused by abundant water inflow into the tunnel. Solution cavities, especially those filled with water, can also cause deformation of the tunnels during operation, resulting in water inflow into the tunnel. If these cavities are filled with loose sediments

APA, Harvard, Vancouver, ISO, and other styles

3

Cutler, Paul M. "Modelling the evolution of subglacial tunnels due to varying water input." Journal of Glaciology 44, no. 148 (1998): 485–97. http://dx.doi.org/10.3189/s002214300000201x.

Full text

Abstract:

AbstractThe time evolution of a subglacial tunnel cross-section is examined usine a two-dimensional finite-element ice-flow model coupled to an idealized drainage system. Simulations are driven by physically based calculations of surface water-input variations at Slorgiaciaren, Sweden. Highlights of the model are its ability to handle unsteady conditions and irregular tunnel shapes. Agreement between modelled water pressure and borehole water levels is good. The following conclusions are reached: (i) Tunnels adapt to fluctuating inflow on time-scales of days. Storms, during which effective pre

APA, Harvard, Vancouver, ISO, and other styles

4

Cutler, Paul M. "Modelling the evolution of subglacial tunnels due to varying water input." Journal of Glaciology 44, no. 148 (1998): 485–97. http://dx.doi.org/10.1017/s002214300000201x.

Full text

Abstract:

AbstractThe time evolution of a subglacial tunnel cross-section is examined usine a two-dimensional finite-element ice-flow model coupled to an idealized drainage system. Simulations are driven by physically based calculations of surface water-input variations at Slorgiaciaren, Sweden. Highlights of the model are its ability to handle unsteady conditions and irregular tunnel shapes. Agreement between modelled water pressure and borehole water levels is good. The following conclusions are reached: (i) Tunnels adapt to fluctuating inflow on time-scales of days. Storms, during which effective pre

APA, Harvard, Vancouver, ISO, and other styles

5

Makoto, Yamaguchi, Kiwata Takahiro, Kono Takaaki, and Ueno Toshiyuki. "1192 WATER TUNNEL EXPERIMENTS ON TRANSVERSE VIBRATION OF A CANTILEVERED PRISM." Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF) 2013.4 (2013): _1192–1_—_1192–6_. http://dx.doi.org/10.1299/jsmeicjwsf.2013.4._1192-1_.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Wen, Jiwei, Pengshuai Zhang, Zhe Xiong, et al. "Laboratory Experimental Investigation on the Structural Optimization of a Novel Coupled Energy Tunnel." Buildings 14, no. 11 (2024): 3333. http://dx.doi.org/10.3390/buildings14113333.

Full text

Abstract:

Freezing damage to tunnels in cold regions has long posed a threat to the safe operation of high-speed trains and other means of transportation. Finding a reasonable and effective solution to this problem, while also considering green, low-carbon, energy-saving, and environmental protection measures, has garnered widespread attention. Herein, the concept of a novel coupled energy tunnel is proposed, which combines the technologies of an air curtain and ground source heat pump (GSHP). The aim is to effectively address the issue of freezing damage in tunnels located in cold regions, while ensuri

APA, Harvard, Vancouver, ISO, and other styles

7

GONZALEZ-RODRIGUEZ, DAVID, and OLE SECHER MADSEN. "Boundary-layer hydrodynamics and bedload sediment transport in oscillating water tunnels." Journal of Fluid Mechanics 667 (November 1, 2010): 48–84. http://dx.doi.org/10.1017/s0022112010004337.

Full text

Abstract:

Oscillating water tunnels are experimental facilities commonly used in coastal engineering research. They are intended to reproduce near-bed hydrodynamic and sediment transport phenomena at a realistic scale. In an oscillating water tunnel, a piston generates an oscillatory motion that propagates almost instantaneously to the whole tunnel; consequently, flow is uniform along the tunnel, unlike the propagating wave motion in the sea or in a wave flume. This results in subtle differences between the boundary-layer hydrodynamics of an oscillating water tunnel and of a propagating wave, which may

APA, Harvard, Vancouver, ISO, and other styles

8

Aziz, Fahrurrozi, Katrine A. Stewart, and Sylvie Jenni. "Early Growth of Muskmelon in Mulched Minitunnels Containing a Thermal Water Tube. I. Carbon Dioxide Concentrations in the Tunnel." Journal of the American Society for Horticultural Science 126, no. 6 (2001): 757–63. http://dx.doi.org/10.21273/jashs.126.6.757.

Full text

Abstract:

Temperature modification is the most investigated environmental factor considered to affect muskmelon (Cucumis melo L. Reticulatus Group) growth in a mulched minitunnel production system. Until now, effects on CO2 concentrations within the tunnel have been ignored. Experiments on production of `Earligold' netted muskmelon were conducted in 1997, 1998, and 1999 to determine daily CO2 concentrations for 10 mulched minitunnel and thermal water tube combinations. Carbon dioxide concentrations under nonperforated (clear or infrared-blocking polyethylene) tunnels were significantly higher (three to

APA, Harvard, Vancouver, ISO, and other styles

9

Huang, Zhangkai, Meixia Chen, Ting Wang, Huachang Cui, and Wenkai Dong. "Numerical Investigation of Background Noise in a Circulating Water Tunnel." Machines 11, no. 8 (2023): 839. http://dx.doi.org/10.3390/machines11080839.

Full text

Abstract:

The presence of excessive background noise in hydrodynamic noise experiments conducted in circulating water tunnels can significantly impact the accuracy and reliability of experimental test results. To address this issue, it is crucial to evaluate and optimize the background noise during the design stage. In this research, acoustic field model and fluid–solid coupling numerical calculation model of circulating water tunnels are established. Utilizing the finite element method, we analyze the flow noise and flow-excited noise resulting from wall pressure pulses in the circulating water tunnel.

APA, Harvard, Vancouver, ISO, and other styles

10

Kerwin, Justin E. "The MIT Marine Hydrodynamics Water Tunnel—A 53rd Anniversary Celebration." Marine Technology and SNAME News 31, no. 03 (1994): 183–94. http://dx.doi.org/10.5957/mt1.1994.31.3.183.

Full text

Abstract:

Fifty-three years ago, Professor Frank M. Lewis presented a paper entitled "Propeller Testing Tunnel at the Massachusetts Institute of Technology," at the spring meeting of SNAME. The tunnel is still there, although its name is changed, and its appearance2 is very different. However, the goals of the laboratory are still very much the same—to conduct innovative experiments designed to learn more about the fundamentals of the flow around propellers and other objects of interest to ocean engineers. This paper presents a historical review of many of the varied experiments conducted since the tunn

APA, Harvard, Vancouver, ISO, and other styles

11

Bao, Tong, Sulei Zhang, Chang Liu, and Qing Xu. "Experimental Study on the Effect of Hydraulic Deterioration of Different Drainage Systems on Lining Water Pressure." Processes 10, no. 10 (2022): 1975. http://dx.doi.org/10.3390/pr10101975.

Full text

Abstract:

With the increasing operation time of tunnels, the drainage system cannot fulfil its proper function as a result of the deterioration of traditional waterproof and drainage systems (TWDS), such as the blockage of drainage blind pipes and the failure of drainage boards. Therefore, the lining bears a high water pressure and even causes disasters such as tunnel leakage and lining cracking. An effective solution to mitigate these issues is to adjust the tunnel drainage scheme. In view of this, a composite waterproof and drainage system (CWDS) is proposed in this paper. To verify the effectiveness

APA, Harvard, Vancouver, ISO, and other styles

12

Machado Jorge, Vitor Augusto, Pedro Daniel de Cerqueira Gava, Juan Ramon Belchior de França Silva, et al. "Analytical Approach to Sampling Estimation of Underwater Tunnels Using Mechanical Profiling Sonars." Sensors 21, no. 5 (2021): 1900. http://dx.doi.org/10.3390/s21051900.

Full text

Abstract:

Hydroelectric power plants often make use of tunnels to redirect the flow of water to the plant power house. Such tunnels are often flooded and can span considerable distances. Periodical inspections of such tunnels are highly desirable since a tunnel collapse will be catastrophic, disrupting the power plant operation. In many cases, the use of Unmanned Underwater Vehicles (UUVs) equipped with mechanical profiling sonars is a suitable and affordable way to gather data to generate 3D mapping of flooded tunnels. In this paper, we study the resolution of 3D tunnel maps generated by one or more me

APA, Harvard, Vancouver, ISO, and other styles

13

Lai, Leyi, Yuanzhu Zhang, and Kuixin Xu. "Prediction of Wet Area of Underwater Tunnel Lining." Buildings 14, no. 2 (2024): 408. http://dx.doi.org/10.3390/buildings14020408.

Full text

Abstract:

The issue of water seepage poses a significant challenge in tunnel infrastructure. Wet areas are commonly used to evaluate the degree of water seepage in tunnel projects. To investigate the feasibility for numerical simulation to predict a wet area, we selected concrete test blocks with two types of defects—holes and cracks—as the research specimens. Numerical models for various seepage conditions were constructed using TOUGH2, and the results were validated through laboratory experiments. Additionally, the Shenjiamen Subsea Tunnel was simplified into a numerical model, employing TOUGH2 to for

APA, Harvard, Vancouver, ISO, and other styles

14

Zhao, Shuanfeng, Bo Liu, Bowen Ren, et al. "Three-Dimensional ERT Advanced Detection Method with Source-Position Electrode Excitation for Tunnel-Boring Machines." Sensors 24, no. 10 (2024): 3213. http://dx.doi.org/10.3390/s24103213.

Full text

Abstract:

Tunnel-boring machines (TBMs) are widely used in urban underground tunnel construction due to their fast and efficient features. However, shield-tunnel construction faces increasingly complex geological environments and may encounter geological hazards such as faults, fracture zones, water surges, and collapses, which can cause significant property damage and casualties. Existing geophysical methods are subject to many limitations in the shield-tunnel environment, where the detection space is extremely small, and a variety of advanced detection methods are unable to meet the required detection

APA, Harvard, Vancouver, ISO, and other styles

15

Hynninen, Antti, Ville Viitanen, Jukka Tanttari, Rhena Klose, Claudio Testa, and Jussi Martio. "Multiphase Flow Simulation of ITTC Standard Cavitator for Underwater Radiated Noise Prediction." Journal of Marine Science and Engineering 11, no. 4 (2023): 820. http://dx.doi.org/10.3390/jmse11040820.

Full text

Abstract:

This work focuses on the main issues related to noise measurements in cavitation tunnels. The scope of the paper is to twofold: to obtain a better understanding on the main phenomena underlying experiments and to define consistent cavitation tunnel measurement corrections for background noise, wall reflections, and distance normalisation. To this aim, the acoustic field generated by the ITTC standard cavitator model inside a cavitation tunnel is predicted by Lighthill’s acoustic analogy and solved through a finite element method that inherently accounts for the presence of the walls. Sources o

APA, Harvard, Vancouver, ISO, and other styles

16

Manovski, P., P. Gulotta, C. M. de Silva, et al. "Particle tracer analysis for PIV experiments in a closed loop transonic wind tunnel." Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics 20 (July 11, 2022): 1–22. http://dx.doi.org/10.55037/lxlaser.20th.225.

Full text

Abstract:

A performance study of several tracer particles for PIV has been conducted. The study included particle response time analysis of an oblique shock wave generated by a conical nose of a store model in a closed loop transonic wind tunnel, and in-situ measurements of the particle size distribution in a low-speed wind tunnel facility. From the oblique shock wave analysis, the estimated particle response time for different smoke materials and generator settings was of the order of 1.4 - 2.2 μs and the effective particle size was 0.58 - 0.85 μm, which was much larger than the measured geometric mean

APA, Harvard, Vancouver, ISO, and other styles

17

Zhou, Yuanfu, Xuefu Zhang, Yuanpeng Liu, and Yuanguang Yang. "Groundwater Discharge Limits of Mountain Tunnels Based on the Normal Growth of Typical Herbaceous Plants." Applied Sciences 14, no. 15 (2024): 6561. http://dx.doi.org/10.3390/app14156561.

Full text

Abstract:

Abstract: The construction of mountain tunnels can lead to groundwater loss and severely impact plant growth. In order to study the limited discharge of groundwater in mountain tunnels for the normal growth of typical herbaceous plants, a tunnel in the alpine meadow area of Qinghai Province was taken as the research objective. Based on transplant experiments, numerical simulations, and the empirical calculation of tunnel discharge limits, the minimum water level required for the normal growth of herbaceous plants, groundwater changes, and grouting parameters during tunnel construction, as well

APA, Harvard, Vancouver, ISO, and other styles

18

Liu, Yuanming, Chen Peng, Qiaowei Yuan, and Huiyu Chen. "Chemical Evolution Process and Quality Assessment of Seepage Groundwater in Tunnel Crossing Gas-Bearing Coal Seams." Geofluids 2022 (May 16, 2022): 1–20. http://dx.doi.org/10.1155/2022/8524932.

Full text

Abstract:

The chemical characteristics of groundwater in the gas coal seam section of the tunnel have rich geological significance. To study the chemical evolution process and controlling factors of groundwater in the gas-bearing coal seam section of the tunnel, and the influence of tunnel coal removal on the groundwater quality, field investigations and laboratory experiments were carried out on the groundwater in the coal measure strata and the high-gaseous section and surrounding aquifers. Through hydrochemical analysis, correlation analysis, hydrochemical simulation, and other methods, the chemical

APA, Harvard, Vancouver, ISO, and other styles

19

Lin, C. N., Yu Yong Jiao, and Q. S. Liu. "Site Experiment for Predicting Hazardous Geological Formations ahead of Tunnel Face." Key Engineering Materials 326-328 (December 2006): 461–64. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.461.

Full text

Abstract:

In the construction of railways in western part of China, more and more long tunnels have been excavated these years, and several ones are under construction at the moment. Because of the complex geologies like faults, fractured zones, karst cavities as well as water bearing formations, the stability and safety of tunnels have been challenging topics in the construction process. In this regard, the advance knowledge of the location, size, and spatial information of the uncertainties ahead of the face is very important to the contractors. In this paper, by using the Tunneling Seismic Prediction

APA, Harvard, Vancouver, ISO, and other styles

20

Jian, Liu, He Na, Yin Wen Wu, and Liu Jin. "Water Jet Vacuum Dust Suppression Device Used to Tunnel Development." Advanced Materials Research 594-597 (November 2012): 1188–92. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.1188.

Full text

Abstract:

At present domestic tunnel construction, dust is one of the main factors which impact the production efficiency, safety clean production. It not only pollutes the environment, but also threats the health of workers. This article start from the tunnel dust prevention, control measures, heading face negative pressure control dust, and spray jet with the dust, to do research about the mineral water jet dust negative pressure technology. Combining experiments and field test methods, Study the dust fall mechanism of the tunnel water jet vacuum dust suppression, the device parameters and the effect

APA, Harvard, Vancouver, ISO, and other styles

21

Wang, Jianxiu, Ansheng Cao, Zhao Wu, et al. "Experiment and Numerical Simulation on Grouting Reinforcement Parameters of Ultra-Shallow Buried Double-Arch Tunnel." Applied Sciences 11, no. 21 (2021): 10491. http://dx.doi.org/10.3390/app112110491.

Full text

Abstract:

For an ultra-shallow buried double-arch tunnel with a large cross-section, the arching effect is difficult to form in surrounding rock, and grouting method is often adopted to reinforce the surrounding rock. Hence, examining the grouting reinforcement parameters is of great significance for potential failure and collapse prevention. The land part of Haicang undersea tunnel was selected as a case study; laboratory experiments, theoretical analysis, and numerical simulation were performed to determine the grouting solid strength and grouting reinforcement parameters. The effects of different wat

APA, Harvard, Vancouver, ISO, and other styles

22

Li, Shuai, Jianmin Zhang, Xiaoqing Chen, Gordon G. D. Zhou, and Jiangang Chen. "Characteristics of aeration in the flow downstream of a radial gate with a sudden fall-expansion aerator in a discharge tunnel." Water Supply 18, no. 3 (2017): 790–98. http://dx.doi.org/10.2166/ws.2017.155.

Full text

Abstract:

Abstract The mechanisms of cavitation damage in flood releasing tunnels remain unclear. In this study a series of physical experiments and numerical calculations were conducted to investigate the flow pattern, pressure distribution and cavitation downstream of a sudden fall-expansion aerator in a discharge tunnel. When the radial gate was partly open, the bottom cavity length reduced drastically, the lateral cavity disappeared, and the flow cavitation index near the sidewalls was less than 0.2. The pressure on the floor and sidewalls can be divided into four regimes: the cavity regime, the imp

APA, Harvard, Vancouver, ISO, and other styles

23

Dvanajščak, Drago, Jože Ratej, and Vojkan Jovičić. "Sustainability of Water Resources in Karst Undermined by Tunneling: A Case Example." Sustainability 14, no. 2 (2022): 732. http://dx.doi.org/10.3390/su14020732.

Full text

Abstract:

Water resources in karsts are scarce due to the high cavernosity in the otherwise low-permeability limestone rock mass. The highly variable porosity and transmissivity of karst aquifers are caused by a network of channels, caverns, and caves that typically act as water-bearing, connected vessels. Tunneling in a karst environment can severely deplete an aquifer and undermine the sustainability of water resources over the long term. A research study was carried out to elaborate and develop measures for the sustainable preservation of the water resources in a Slovenian karst, in which two approxi

APA, Harvard, Vancouver, ISO, and other styles

24

Su, Haijian, Yujie Feng, Qingzhen Guo, Hongwen Jing, and Wenxin Zhu. "Model Experimental Study on the Seepage and Failure Features of Tunnel under Wetting-Drying Alternation with Increasing Water Pressure." Geofluids 2020 (July 4, 2020): 1–11. http://dx.doi.org/10.1155/2020/8845528.

Full text

Abstract:

Wetting-drying alternation caused by seasonal rainfall and water fluctuation has a negative effect on the rock mass. Model experiments were conducted in this paper to investigate the role of wetting-drying alternation on the seepage and failure features of a tunnel. Water-bearing structure was located in the lateral position of tunnel. The stratum thickness between the tunnel and water-bearing structure was ranged from 20 to 100 mm. The results showed that, with an increase in the wetting-drying alternation number, the pore water pressure increases gradually. The critical water pressure also i

APA, Harvard, Vancouver, ISO, and other styles

25

Bansmer, Stephan E., Arne Baumert, Stephan Sattler, et al. "Design, construction and commissioning of the Braunschweig Icing Wind Tunnel." Atmospheric Measurement Techniques 11, no. 6 (2018): 3221–49. http://dx.doi.org/10.5194/amt-11-3221-2018.

Full text

Abstract:

Abstract. Beyond its physical importance in both fundamental and climate research, atmospheric icing is considered as a severe operational condition in many engineering applications like aviation, electrical power transmission and wind-energy production. To reproduce such icing conditions in a laboratory environment, icing wind tunnels are frequently used. In this paper, a comprehensive overview on the design, construction and commissioning of the Braunschweig Icing Wind Tunnel is given. The tunnel features a test section of 0.5 m × 0.5 m with peak velocities of up to 40 m s−1. The static air

APA, Harvard, Vancouver, ISO, and other styles

26

He, Jun, Jinping Ou, Xiangsheng Chen, Shuya Liu, Kewen Huang, and Xu Zhang. "Upper Shallow Foundation Pit Engineering: Utilization and Evaluation of Portal Frame Anti-Heave Structures." Buildings 15, no. 11 (2025): 1943. https://doi.org/10.3390/buildings15111943.

Full text

Abstract:

The excavation of upper shallow foundation pits may cause the uneven deformation of existing tunnels buried below a shallow depth. Improper control measures may lead to a series of diseases, such as local cracking or breakage of the tunnel lining, which threaten the safety of tunnel operations. Regarding the safety of the existing tunnel affected by the construction of the foundation pit, cases of the application of portal frame anti-heave structures in upper foundation pit projects of existing tunnels in Shenzhen have been documented, and the main influencing factors have been analyzed and su

APA, Harvard, Vancouver, ISO, and other styles

27

Wang, X., J. Jiang, and R. Kaye. "Improvement of a wind-tunnel sampling system for odour and VOCs." Water Science and Technology 44, no. 9 (2001): 71–77. http://dx.doi.org/10.2166/wst.2001.0511.

Full text

Abstract:

Wind-tunnel systems are widely used for collecting odour emission samples from surface area sources. Consequently, a portable wind-tunnel system was developed at the University of New South Wales that was easy to handle and suitable for sampling from liquid surfaces. Development work was undertaken to ensure even air-flows above the emitting surface and to optimise air velocities to simulate real situations. However, recovery efficiencies for emissions have not previously been studied for wind-tunnel systems. A series of experiments was carried out for determining and improving the recovery ra

APA, Harvard, Vancouver, ISO, and other styles

28

Zhao, Xin, and Edward E. Carey. "Summer Production of Lettuce, and Microclimate in High Tunnel and Open Field Plots in Kansas." HortTechnology 19, no. 1 (2009): 113–19. http://dx.doi.org/10.21273/hortsci.19.1.113.

Full text

Abstract:

High tunnels have been shown to be a profitable season-extending production tool for many horticultural crops. Production of cool-season vegetables during the hot summer months represents a challenge to market growers in the midwestern United States. Two experiments were conducted to investigate the microclimate and production of eight leaf lettuce (Lactuca sativa) cultivars in high tunnels and open fields, using unshaded and shaded (39% white shadecloth) tunnels in Summer 2002 and 2003, respectively. Wind speed was consistently lower in high tunnels with the sidewalls and endwalls open. An un

APA, Harvard, Vancouver, ISO, and other styles

29

Zhao, Xin, and Edward E. Carey. "Summer Production of Lettuce, and Microclimate in High Tunnel and Open Field Plots in Kansas." HortTechnology 19, no. 1 (2009): 113–19. http://dx.doi.org/10.21273/horttech.19.1.113.

Full text

Abstract:

High tunnels have been shown to be a profitable season-extending production tool for many horticultural crops. Production of cool-season vegetables during the hot summer months represents a challenge to market growers in the midwestern United States. Two experiments were conducted to investigate the microclimate and production of eight leaf lettuce (Lactuca sativa) cultivars in high tunnels and open fields, using unshaded and shaded (39% white shadecloth) tunnels in Summer 2002 and 2003, respectively. Wind speed was consistently lower in high tunnels with the sidewalls and endwalls open. An un

APA, Harvard, Vancouver, ISO, and other styles

30

Yao, Xianchun, Ning Li, Kecheng Wan, Gao Lv, and Mingming He. "Experimental and Analytical Study on Mechanical Properties of High Rock Temperature Diversion Tunnel." Advances in Civil Engineering 2019 (April 3, 2019): 1–11. http://dx.doi.org/10.1155/2019/9537153.

Full text

Abstract:

The high temperature of rock used in different working conditions has a significant effect on the deformation characteristics and the mechanics of tunnel lining support structure. A test using a laboratory model is designed to study the quantitative relationship between the temperature difference and the support force. Through the laboratory model test, the strain and stress variation characteristics of the supporting structure of a water diversion tunnel under different surrounding rock temperatures and different water temperatures were simulated. The variation characteristics of the supporti

APA, Harvard, Vancouver, ISO, and other styles

31

Johansen, Espen S., and Othon K. Rediniotis. "Unsteady Calibration of Fast-Response Pressure Probes, Part 2: Water-Tunnel Experiments." AIAA Journal 43, no. 4 (2005): 827–34. http://dx.doi.org/10.2514/1.12355.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Zhang, Yuanzhu, Xiaozhen Li, and Guohua Yu. "Chloride Transport in Undersea Concrete Tunnel." Advances in Materials Science and Engineering 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/1085934.

Full text

Abstract:

Based on water penetration in unsaturated concrete of underwater tunnel, a diffusion-advection theoretical model of chloride in undersea concrete tunnel was proposed. The basic parameters including porosity, saturated hydraulic conductivity, chloride diffusion coefficient, initial water saturation, and moisture retention function of concrete specimens with two water-binder ratios were determined through lab-scale experiments. The variation of chloride concentration with pressuring time, location, solution concentration, initial saturation, hydraulic pressure, and water-binder ratio was investi

APA, Harvard, Vancouver, ISO, and other styles

33

Bussink, D. W., J. F. M. Huijsmans, and J. J. M. H. Ketelaars. "Ammonia volatilization from nitric-acid-treated cattle slurry surface applied to grassland." Netherlands Journal of Agricultural Science 42, no. 4 (1994): 293–309. http://dx.doi.org/10.18174/njas.v42i4.590.

Full text

Abstract:

The reduction in NH3 loss from HNO3 treated cattle slurry, surface applied to grassland, was measured on different soil types throughout the Netherlands from 1989 to 1992. Thirteen micro-meteorological mass balance and 10 small wind tunnel experiments were carried out. Amounts varying between 7-17 and 10-30 m-3 ha-1 were applied, resp. and measurements were performed for 4 and 10 days, resp. The pH of treated slurry ranged from 3.9 to 6.6. A mean total of 60% (range: 29-98%) of the NH4-N from untreated slurry was volatilized in the mass balance experiments. A reduction in NH3 volatilization of

APA, Harvard, Vancouver, ISO, and other styles

34

Guo, Qingzhen, Haijian Su, Hongwen Jing, and Wenxin Zhu. "Effect of Wetting-Drying Cycle on the Deformation and Seepage Behaviors of Rock Masses around a Tunnel." Geofluids 2020 (May 26, 2020): 1–14. http://dx.doi.org/10.1155/2020/4237163.

Full text

Abstract:

Water inrush caused by the wetting-drying cycle is a difficult problem in tunnel excavation. To investigate the effect of the wetting-drying cycle on the stability of the tunnel surrounding rock, physical experiments and numerical simulations regarding the process of tunnel excavation with different wetting-drying cycle numbers were performed in this study. The evolutions of stress, displacement, and pore water pressure were analyzed. With the increase in cycle number, the pore water pressure, vertical stress, and top-bottom approach of the tunnel surrounding rock increase gradually. And the i

APA, Harvard, Vancouver, ISO, and other styles

35

Aziz, Fahrurrozi, Katrine A. Stewart, and Sylvie Jenni. "Early Growth of Muskmelon in Mulched Minitunnels Containing a Thermal Water Tube. II. Air, Soil, and Water Tube Temperatures and Vegetative Growth." Journal of the American Society for Horticultural Science 126, no. 6 (2001): 764–70. http://dx.doi.org/10.21273/jashs.126.6.764.

Full text

Abstract:

Field experiments were conducted during 1997, 1998, and 1999 to determine effects of 10 combinations of mulched minitunnel and thermal water tube on air, soil, and water-tube temperatures and on vegetative growth of `Earligold' netted muskmelon (Cucumis melo L. Reticulatus Group) within the tunnels. Use of mulched minitunnels significantly increased air, soil and water temperatures during the preanthesis phase in all years compared with control treatments. Inclusion of water tubes and venting the tunnels decreased air temperature fluctuations in the tunnels. During the first 10 to 15 days afte

APA, Harvard, Vancouver, ISO, and other styles

36

Cao, Kewang, Furong Dong, Liqiang Ma, et al. "Infrared Precursor Experiment to Predict Water Inrushes in Underground Spaces Using a Multiparameter Normalization." Sustainability 15, no. 9 (2023): 7570. http://dx.doi.org/10.3390/su15097570.

Full text

Abstract:

Rock failure is the root cause of geological disasters such as slope failure, civil tunnel collapse, and water inrush in roadways and mines. Accurate and effective monitoring of the loaded rock failure process can provide reliable precursor information for water inrushes in underground engineering structures such as in mines, civil tunnels, and subways. The water inrush may affect the safe and efficient execution of these engineering structures. Therefore, it is essential to predict the water inrush effectively. In this paper, the water inrush process of the roadway was simulated by laboratory

APA, Harvard, Vancouver, ISO, and other styles

37

Yang, Jinduo, Xi’an Li, Weiping Wang, Hao Chai, Mingxiao An, and Qianyi Dai. "The Mechanism of Dust Transportation Based on Wind Tunnel Experiments and Numerical Simulations." Water 16, no. 7 (2024): 1006. http://dx.doi.org/10.3390/w16071006.

Full text

Abstract:

The process of dust transportation is widespread, leading to the formation of regions such as the Loess Plateau. In order to understand the mechanisms of dust particle transportation, this study conducted wind tunnel experiments to simulate natural wind-driven dust transport processes. Theoretical derivations were carried out to establish the relationship between particle size and transportation distance, which was then validated through numerical simulations. The following conclusions were drawn: (1) wind tunnel experiments, theoretical derivations, and numerical simulations yielded consisten

APA, Harvard, Vancouver, ISO, and other styles

38

Zhou, Guanqun, Mingxin Yue, Xiaodong Yang, et al. "A metal interference correction method of tunnel transient electromagnetic advanced detection." Journal of Geophysics and Engineering 17, no. 3 (2020): 429–38. http://dx.doi.org/10.1093/jge/gxaa002.

Full text

Abstract:

Abstract Water inrush during tunnel excavation severally threatens the mining safety as blind water-bearing structures may develop in front of the working face. The transient electromagnetic method (TEM) has been widely applied in the advanced detection of tunnel water-bearing structures. However, the metal interference of both supports and tools in the tunnel has become a bottleneck that reduces the forecast accuracy of this method. In this paper, we analyse the effect of metal interference on TEM data and propose a novel set of an observation and correction method under metal interference ba

APA, Harvard, Vancouver, ISO, and other styles

39

Siwek, Piotr, Iwona Domagała-Świątkiewicz, Andrzej Kalisz, and Piotr Bucki. "MICROCLIMATIC CONDITIONS AND PHYSICO-CHEMICAL PROPERTIES OF SOIL IN INTENSIVE ECOLOGICAL VEGETABLE CROP ROTATION IN HIGH TUNNEL." Acta Scientiarum Polonorum Hortorum Cultus 19, no. 3 (2020): 73–81. http://dx.doi.org/10.24326/asphc.2020.3.7.

Full text

Abstract:

In 2014–2015 at the experimental station of the University of Agriculture in Kraków, situated in Mydlniki near Kraków, Poland, experiments with intensive crop rotation in a high tunnel were conducted. The objectives concerned microclimatic zones in the tunnel and the yield and quality of butterhead lettuce (spring), cucumber (summer), and butterhead lettuce (autumn). Besides the properties of the soil in the high tunnel, a crucial role was played by microclimatic factors. The measurements showed variations in solar radiation, temperature and air humidity depending on the zone in the tunnel and

APA, Harvard, Vancouver, ISO, and other styles

40

Itagaki, K., G. E. Lemieux, and H. W. Bosworth. "Ice Accretion Under Natural and Laboratory Conditions." Annals of Glaciology 6 (1985): 225–28. http://dx.doi.org/10.3189/1985aog6-1-225-228.

Full text

Abstract:

To compare results of icing studies conducted in wind tunnels with natural icing conditions, a series of rotor icing studies were made on top of Mt. Washington, New Hampshire. The results indicated that considerable differences exist between the two under conditions of similar liquid water content and temperature. The wet-to-dry growth transition temperature, for instance, with comparable temperature and liquid water content, may be more than 10°C higher under natural conditions than in wind tunnel studies. The possible cause of such discrepancies was found to be the vapor saturation existing

APA, Harvard, Vancouver, ISO, and other styles

41

Itagaki, K., G. E. Lemieux, and H. W. Bosworth. "Ice Accretion Under Natural and Laboratory Conditions." Annals of Glaciology 6 (1985): 225–28. http://dx.doi.org/10.1017/s0260305500010417.

Full text

Abstract:

To compare results of icing studies conducted in wind tunnels with natural icing conditions, a series of rotor icing studies were made on top of Mt. Washington, New Hampshire. The results indicated that considerable differences exist between the two under conditions of similar liquid water content and temperature. The wet-to-dry growth transition temperature, for instance, with comparable temperature and liquid water content, may be more than 10°C higher under natural conditions than in wind tunnel studies. The possible cause of such discrepancies was found to be the vapor saturation existing

APA, Harvard, Vancouver, ISO, and other styles

42

Bubalo, Adis, and Muris Torlak. "EFFECT OF THE TURBINE CLOSING TIME ON THE WATER FLOW IN THE SUPPLY SYSTEM OF A DIVERSION HYDROPOWER PLANT WITH A SURGE TANK." Mašinstvo 16, no. 2 (2019): 23–27. https://doi.org/10.62456/jmem.2019.02.023.

Full text

Abstract:

&lt;p style=&quot;text-align: justify;&quot;&gt;In this paper, a model based on numerical solution of two ordinary differential equations is used to obtain the water level in the surge tank and the static pressure in the headrace tunnel &amp;ndash; the properties of essential importance for the functioning of the water supply system during the turbine shut-off. The model allows a fast and reliable simulation of the hydraulic processes in the headrace tunnel and the surge tank. It was validated by comparing the numerical results with the data available from the experiments c

APA, Harvard, Vancouver, ISO, and other styles

43

KIWATA, Takahiro, Makoto YAMAGUCHI, Takaaki KONO, and Toshiyuki UENO. "Water tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prisms." Journal of Fluid Science and Technology 9, no. 3 (2014): JFST0056. http://dx.doi.org/10.1299/jfst.2014jfst0056.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Feng, Shouzhong, Deyuan Kan, and Chao Guo. "Full-Scale Experimental Investigation of Temperature Distribution and Smoke Flow in a Road Tunnel with a Novel Water Mist Fire Fighting System." Fire 8, no. 6 (2025): 216. https://doi.org/10.3390/fire8060216.

Full text

Abstract:

This study presents a novel water mist fire fighting system that integrates water mist sprays and water mist curtains, designed to achieve simultaneous fire suppression, thermal insulation, and smoke control. Three full-scale experiments were conducted under various fire scenarios, and the changes in fire behavior and heat release rate were examined to evaluate the effectiveness of the water mist system in extinguishing fires. Additionally, the spatiotemporal changes in ceiling temperature were monitored to assess the cooling and protective effects of the water mist. The thermal insulation cap

APA, Harvard, Vancouver, ISO, and other styles

45

Fredy Surahmanto, Dipta Adityantoro, and Adi Ridwan Satria. "Laboratory-Scale Low-Speed Water Tunnel: Comparison of Experimental Flow Visualization and Computer-Aided Simulation." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 107, no. 1 (2023): 142–64. http://dx.doi.org/10.37934/arfmts.107.1.142164.

Full text

Abstract:

This study aimed at developing the laboratory-scale low-speed water tunnel design by first evaluating the effect of varying the number of wide-angle diffuser vanes and then confirming flow visualization against object geometries tested by experiments and computer-aided simulation. The low-speed water tunnel design in this study consists of a wide-angle diffuser, a honeycomb, a convergent section, and a working section. To ascertain the laminar flow of water would act in the experiment, a prior simulation using 3, 6, and 12 vanes and without a vane was conducted. Some geometries, including tube

APA, Harvard, Vancouver, ISO, and other styles

46

Liu, Qianqian, Yi Zhao, and Caixia Liu. "Experimental research on blowing-rain intensity and uniformity of rain tunnel for aircraft rain removal testing." Journal of Physics: Conference Series 2764, no. 1 (2024): 012045. http://dx.doi.org/10.1088/1742-6596/2764/1/012045.

Full text

Abstract:

Abstract The objective of the present study is to characterize a rain tunnel that is used for performance testing of aircraft windshield rain removal systems. The rain tunnel in the present study is an open jet wind tunnel with six full cone pressure swirl nozzles arranged at its outlet. Experiments are conducted with water at room temperature as the working medium. The influence of total water supply flow rate and air velocity on the blowing-rain intensity and uniformity is studied. The total water supply flow rate varies from 0.57 m3/h to 1.03 m3/h, while the pressure at the inlet of the noz

APA, Harvard, Vancouver, ISO, and other styles

47

Zhang, Yu, and Qing Lin Meng. "Experimental Method Study of Climatic Evaporation of Porous Material in Wind Tunnel." Applied Mechanics and Materials 71-78 (July 2011): 4449–53. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.4449.

Full text

Abstract:

A hot-humid climatic wind tunnel using wind tunnel technology was developed to simulate the true outdoor dynamic climatic parameters, including solar radiation, air temperature, relative humidity and wind speed, which realized a small-step periodic changing climatic environment of a particular area. To obtain atmospheric evaporation force of porous material, water evaporation experiment representing the impact of climatic elements with atmospheric evaporation force was carried out, then a Penman formula based water evaporation experimental model was built. Considered to different texture of ma

APA, Harvard, Vancouver, ISO, and other styles

48

Nie, Hong-bin, and Shuan-cheng Gu. "Ultimate Bearing Capacity Analysis of CFRP-Strengthened Shield Segments Using Bonding Slip Behavior Experiments." Materials 13, no. 18 (2020): 4200. http://dx.doi.org/10.3390/ma13184200.

Full text

Abstract:

Shield segments of subway tunnels are often exposed to the combined actions of several hygrothermal factors that could lead to accidents such as water seepage and tunnel collapse. Further, they often break and deform owing to formation pressure. In addition, uncertainties related to the stress relaxation characteristics and bonding performance of carbon-fiber-reinforced plastics (CFRPs) under a hygrothermal environment make their application in subway systems difficult. This study analyzes the effects of the slip-on-bending strength of CFRP-strengthened shield segments in a hygrothermal enviro

APA, Harvard, Vancouver, ISO, and other styles

49

Zhang, Jinliang, Yongchang Li, Yuansheng Zhang, Fengwei Yang, Chao Liang, and Shunhui Tan. "Using a high-pressure water jet-assisted tunnel boring machine to break rock." Advances in Mechanical Engineering 12, no. 10 (2020): 168781402096229. http://dx.doi.org/10.1177/1687814020962290.

Full text

Abstract:

The concept of tunnel boring machine (TBM) disc cutter rock breaking coupled with high-pressure water jets has been proposed to overcome the difficulties that occur when TBMs encounter extremely hard rocks. Thus, to meet actual engineering requirements for the TBM construction of tunnels as part of the Wan’anxi water diversion project in Longyan City (Fujian Province, China), experiments were conducted on high-pressure water jet-assisted TBM disc cutter rock breaking. By varying kerf depth and width under different water jet parameters and performing disc cutter rock breaking tests on rock sur

APA, Harvard, Vancouver, ISO, and other styles

50

Zhang, J., Y. Shao, and N. Huang. "Measurements of dust deposition velocity in a wind-tunnel experiment." Atmospheric Chemistry and Physics Discussions 14, no. 7 (2014): 9439–74. http://dx.doi.org/10.5194/acpd-14-9439-2014.

Full text

Abstract:

Abstract. In this study, we present the results of a wind-tunnel experiment on dust deposition. A new method is proposed to derive dust deposition velocity from the PDA (Particle Dynamics Analysis) particle-velocity and particle-size measurements. This method has the advantage that the motions of individual dust particles are directly observed and all relevant data for computing dust deposition velocity is collected using a single instrument, and therefore the measurement uncertainties are reduced. The method is used in the wind-tunnel experiment to measure the dust deposition velocities for d

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!