서지주요정보
캐패시턴스 변환기를 이용한 유동 영역의 결정과 기포율 측정 기술에 관한 연구 = A study of flow regime characterization and void fraction measurement technique by capacitance transducers : for application to nuclear power plant
서명 / 저자 캐패시턴스 변환기를 이용한 유동 영역의 결정과 기포율 측정 기술에 관한 연구 = A study of flow regime characterization and void fraction measurement technique by capacitance transducers : for application to nuclear power plant / 성창경.
저자명 성창경 ; Sung, Chang-Kyung
발행사항 [서울 : 한국과학기술원, 1984].
Online Access 제한공개(로그인 후 원문보기 가능)원문

소장정보

등록번호

4102579

소장위치/청구기호

학술문화관(문화관) 보존서고

MNE 8408

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Measurement of various flow parameters are essential in two phase flow systems such as primary and secondary nuclear coolant system. The response of the volumetric concentration of the liquid and vapor phases due to perturbations in heat flux and inlet flow is of particular interest, because of its influence on the neutron dynamics in nuclear reactors. The purpose of this work is to develop a void fraction measurement and flow regime characterization technique in a two phase flow system by capacitance transducer. This technique is based on the fact that dielectric constant of the liquid water is a well defined parameter and the value of the dielectric constant of the liquid (or solid phase) is very large compared to that of the gaseous phase. Depending on the flow pattern and size of bubbles, the total dielectric constant of a two-phase mixture can be related to the relative capacitance. For example, in the case of annular flow regime it is possible to derive a functional relationship between the void fraction and the relative capacitnace, by considering the liquid and vapor phase as capacitors in series. Two basic electrode geometries, "ring" and "strip", were examined in the present tests for sensitivity and flow regime dependency. The ring electrodes consisted of two 10 mm wide aluminum strip attached circumferentially to the tube (outside diameter = 30mm) and separated by 10mm. On the other hand, the strip electrodes were made up of two 60mm long and 46mm wide strip attached longitudinally and separated by 4mm. The void fraction was controlled by varying the diameter of a solid polyacrylate cylinder or the amount of water which is inserted in the pyrex tube. The polyacrylate and paraffin wax were used to simulate annular flows, whereas liquid water and polyacrylate were used to simulate stratified flows. From the test results a relationship between the measured output capacitance of the strip electrodes and void fraction in annular and stratified systems are obtained and the result is compared with the theoretical predictions. In addition, the flow regime dependence of the relative capacitance is also obtained for both ring and strip electrodes.

서지기타정보

서지기타정보
청구기호 {MNE 8408
형태사항 [v], 69 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, 이론적인 relative capacitance 유도
저자명의 영문표기 : Chang-Kyung Sung
지도교수의 한글표기 : 전문헌
지도교수의 영문표기 : Moon-Hyun Chun
학위논문 학위논문(석사) - 한국과학기술원 : 핵공학과,
서지주기 참고문헌 : p. 55-56
주제 Capacitance meters.
유동 특성. --과학기술용어시소러스
기공률. --과학기술용어시소러스
이상 유동. --과학기술용어시소러스
Two-phase flow.
QR CODE qr code