scholarly journals EXPERIMENTAL STUDY ON PHASE INTERFERENCE METHOD FOR PASSIVE REDUCTION OF MULTIPLE EXCITATION FORCES : Reduction method of vibration due to rhythmic action of concert audience

2007 ◽  
Vol 72 (611) ◽  
pp. 13-20
Author(s):  
Ryota INOUE ◽  
Yutaka YOKOYAMA
Keyword(s):  
Experimental Study ◽  
Reduction Method ◽  
Interference Method ◽  
Phase Interference

Flow Analysis and Experimental Study on a Frost Reduction Method for Heat Exchangers

2020 ◽  
Vol 25 (3) ◽  
pp. 9-16
Author(s):  
Gwon-Seok Sun
Keyword(s):  
Experimental Study ◽  
Heat Exchangers ◽  
Reduction Method ◽  
Cooling System ◽  
Flow Analysis ◽  
Finned Tube ◽  
Cooling Efficiency ◽  
Frost Formation ◽  
Air Blast ◽  
New Type

Frosting on the surface of a heat exchanger degrades its cooling efficiency in a cooling system. In this study, frost flow analysis is performed for frost reduction. A new type of air blast refrigerator is designed for reducing frost formation in its finned tube. Experimental results of the frost formation in the air blast refrigerator are presented. The main difference between the proposed and conventional air blast refrigerators is the flow of air through the finned tube. The proposed refrigerator produces less frost than the conventional refrigerators.

A study on acoustic imaging based on beamformer to range spectra in the phase interference method

2013 ◽  
Vol 133 (5) ◽  
pp. 3301-3301
Author(s):  
Ryota Miyake ◽  
Kohei Hayashida ◽  
Masato Nakayama ◽  
Takanobu Nishiura
Keyword(s):  
Acoustic Imaging ◽  
Interference Method ◽  
Phase Interference

Drag Reduction of Recess Type Moonpool Under Vessel’s Forward Speed

2008 ◽  
Author(s):  
Hye-Jong Son ◽  
Soon-Ho Choi ◽  
Man-Hwan Kim ◽  
Seung-Myun Hwangbo
Keyword(s):  
Experimental Study ◽  
Drag Reduction ◽  
Relative Motion ◽  
Reduction Method ◽  
Flow Behavior ◽  
Forward Speed ◽  
Vertical Wells ◽  
Ship Model

Recess type moonpools are vertical wells with step frequently found in Samsung drillship. The recess moonpool was originally invented in order to move the drilling equipments without hull interferences. It was also verified that the recess type moonpool had good performance on reduction of relative motion inside the moonpool during zero speed operation. However, once the ship is under forward speed, the moonpool brings a large drag due to the oscillation of water inside the structure. In this research, a drag reduction method of the moonpool was investigated through analyzing the flow behavior inside the moonpool at the Samsung Ship Model Basin. As a result, the moonpool was modified through numerical and experimental study, which was obtained more than ten percents of drag reduction compared to normal rectangular moonpools.

A study on acoustic imaging based on beamformer to range spectra in the phase interference method

2013 ◽  
Author(s):  
Ryota Miyake ◽  
Kohei Hayashida ◽  
Masato Nakayama ◽  
Takanobu Nishiura
Keyword(s):  
Acoustic Imaging ◽  
Interference Method ◽  
Phase Interference

Experimental study of railway-induced ground vibration reduction method

2021 ◽  
pp. 477-483
Author(s):  
H. Suzuki ◽  
M. Kawakubo ◽  
S. Shibusawa ◽  
T. Nonaka ◽  
K. Sakai
Keyword(s):  
Experimental Study ◽  
Reduction Method ◽  
Vibration Reduction ◽  
Ground Vibration
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