scholarly journals Flow noise measurements at strong tidal current area in Uldolmok Waterway

2013 ◽  
Author(s):  
Myungkwon Ko ◽  
Jee Woong Choi
Keyword(s):  
Tidal Current ◽  
Flow Noise ◽  
Noise Measurements ◽  
Current Area ◽  
Strong Tidal Current

Flow noise measurements at strong tidal current area in Uldolmok Waterway

2013 ◽  
Vol 133 (5) ◽  
pp. 3396-3396
Author(s):  
Myungkwon Ko ◽  
Jee Woong Choi
Keyword(s):  
Tidal Current ◽  
Flow Noise ◽  
Noise Measurements ◽  
Current Area ◽  
Strong Tidal Current

scholarly journals dummySeafloor topography of the strong tidal current area

1500 ◽  
Vol 99967 (9991) ◽  
pp. 9992-9992
Author(s):  
authorYo dummyIwabuchi ◽  
authorYasunori dummyUmeda ◽  
authorKenji dummyMuneda
Keyword(s):  
Tidal Current ◽  
Current Area ◽  
Strong Tidal Current

scholarly journals Seafloor topography of the strong tidal current area

2008 ◽  
Vol 67 (1) ◽  
pp. 2-2
Author(s):  
Yo Iwabuchi ◽  
Yasunori Umeda ◽  
Kenji Muneda
Keyword(s):  
Tidal Current ◽  
Seafloor Topography ◽  
Current Area ◽  
Strong Tidal Current

Conceptual Design of the Flow Noise Simulator

2003 ◽  
Author(s):  
Ryuichi Sato ◽  
Takayuki Mori ◽  
Ryo Yakushiji ◽  
Kenji Naganuma ◽  
Masaharu Nishimura ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Large Scale ◽  
Scale Model ◽  
Variable Pressure ◽  
Cavitation Noise ◽  
Flow Noise ◽  
Model Studies ◽  
Surface Ship ◽  
Noise Measurements ◽  
Under Construction

The Flow Noise Simulator (FNS) of the 1st Research Center of TRDI/JDA (Japan Defense Agency) is a large, variable pressure, recirculating water tunnel with very low background noise level. The tunnel is 20m high and 49m long, containing 2000m3 of water. The test section has a square cross section of 2m × 2m with 10m in length. It will accept large size surface ship models of 6m, submarine models of 4m in length and full scale ship appendix models. The FNS is currently under construction and will be accomplished in 2005. It will be used for a wide variety of hydrodynamic and hydroacoustic testing of surface ships and submarines, such as propeller cavitation noise measurements and propeller-hull interaction observation, with sufficiently large scale models. Conceptual design of the FNS was started in 1996 and evaluated by following scale model studies. This paper discusses some technical issues of the FNS.

scholarly journals Study on hydraulic problems associated with the construction of large bridge foundation under strong tidal current.

1991 ◽  
pp. 71-80
Author(s):  
Mitsushige SAKAMOTO ◽  
Masatoshi SASAKI ◽  
Masaaki KITAGUCHI ◽  
Kanji IMAI
Keyword(s):  
Tidal Current ◽  
Bridge Foundation ◽  
Strong Tidal Current

scholarly journals Marine and anthropogenic controls on the estuary of the Suriname River over the past 50 years

2016 ◽  
Vol 95 (4) ◽  
pp. 419-428
Author(s):  
K. Gersie ◽  
P.G.E.F. Augustinus ◽  
R.T. Van Balen
Keyword(s):  
Tidal Current ◽  
River Flow ◽  
Sediment Load ◽  
Anthropogenic Activities ◽  
Fluvial Systems ◽  
Sediment Fluxes ◽  
Fine Grained ◽  
The Past ◽  
The Impact ◽  
Strong Tidal Current

AbstractHumans have played an important role in fluvial systems because of the impact of their land-use activities, frequently leading to degradation of environmental conditions. Rivers, which are the primary agents in sediment transport, have thus been subject to changes in sediment fluxes. The Suriname River has been affected by anthropogenic activities since colonial times, and has experienced strong discharge and sediment-load changes since the construction of the Afobaka Dam in 1964. The river's estuary sediments largely consist of fine-grained sediments, originating, ultimately, from the Amazon River and transported by the strong tidal current. The influence of this tidal current is diminished at the head of the estuary, allowing the river flow to become dominant. Also remarkable is the interaction of the Suriname River and the westward-migrating mudbanks which is evident in the changing magnitude and volume of Braamspunt, a mudcape located at the mouth of the estuary. The regulated discharge of the river results in a change of the river's morphology, resulting, among other things, in the growth of river bars.

scholarly journals A Vector Sensor-Based Acoustic Characterization System for Marine Renewable Energy

2020 ◽  
Vol 8 (3) ◽  
pp. 187
Author(s):  
Kaustubha Raghukumar ◽  
Grace Chang ◽  
Frank Spada ◽  
Craig Jones
Keyword(s):  
Renewable Energy ◽  
Three Dimensional ◽  
Acoustic Flow ◽  
Flow Noise ◽  
Vector Sensor ◽  
Acoustic Signature ◽  
Vector Sensors ◽  
Noise Measurements ◽  
Noise Data ◽  
Using Data

NoiseSpotter is a passive acoustic monitoring system that characterizes, classifies, and geo-locates anthropogenic and natural sounds in near real time. It was developed with the primary goal of supporting the evaluation of potential acoustic effects of offshore renewable energy projects. The system consists of a compact array of three acoustic vector sensors, which measures acoustic pressure and the three-dimensional particle velocity vector associated with the propagation of an acoustic wave, thereby inherently providing bearing information to an underwater source of sound. By utilizing an array of three vector sensors, the application of beamforming techniques can provide sound source localization, allowing for characterization of the acoustic signature of specific underwater acoustic sources. Here, performance characteristics of the system are presented, using data from controlled acoustic transmissions in a quiet environment and ambient noise measurements in an energetic tidal channel in the presence of non-acoustic flow noise. Data quality is demonstrated by the ability to reduce non-acoustic flow noise contamination, while system utility is shown by the ability to characterize and localize sources of sound in the underwater environment.

Flow‐Noise Measurements in Water

1966 ◽  
Vol 40 (5) ◽  
pp. 1265-1265
Author(s):  
Gerald J. Franz
Keyword(s):  
Flow Noise ◽  
Noise Measurements

scholarly journals Effect on Ship Maneuvering Motion under Strong Tidal Current

2002 ◽  
Vol 106 (0) ◽  
pp. 113-120
Author(s):  
Yasuyuki NIWA ◽  
Masayoshi NUMANO ◽  
Junji FUKUTO ◽  
Mitsuo TADA
Keyword(s):  
Tidal Current ◽  
Ship Maneuvering ◽  
Maneuvering Motion ◽  
Strong Tidal Current
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