(A) study on flow measurement methods using ultrasonic flowmeter and LDV = 초음파 유량계와 LDV를 이용한 유체의 유동장 측정방법에 관한 연구

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The main objective of this study is to investigate the velocity profile, which is the key factor of flow-accelerated corrosion, in a circular tube through the experimental work and the computational calculation. Performing the present study, two types of representative non-intrusive measurement methods are picked to carry out more accurate flow velocity profile measurement. First, ultrasonic flowmeter is used to get the line averaged velocity profile. Second, laser doppler velocimetry is selected to find the local point-wise velocity profile in the circular tube centerline. To apply these two methods for the circular tube test section, some correction methods are used in each measurement technique. Computational calculation using CFX code is additionally performed in a given test section. LDV measurement method has a weak point in a circular channel due to curvature and ultrasonic flowmeter has a problem in a small diameter channel. Therefore, code calculation data is used to compare with corrected experimental data in each measurement methods. Moreover, calculated flow velocity profile data is converted to visual forms of vectors, contours and shaded contours with JASPER. The present study shows that ultrasonic flowmeter and LDV can measure local velocity data in a small size circular channel.
Advisors
Chang, Soon-Heungresearcher장순흥researcher
Description
한국과학기술원 : 원자력공학과,
Publisher
한국과학기술원
Issue Date
2001
Identifier
165502/325007 / 000993311
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력공학과, 2001.2, [ ix, 60 p. ]

Keywords

ultrasonic flowmeter; LDV; 초음파유량계; CFX

URI
http://hdl.handle.net/10203/49433
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=165502&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
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