3차년도사업추진회의 - Kookminnens.kookmin.ac.kr/research/report/oil_vainpump.pdf ·...
Transcript of 3차년도사업추진회의 - Kookminnens.kookmin.ac.kr/research/report/oil_vainpump.pdf ·...
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명화공업3차년도 사업추진 회의
국민대학교 기계공학과
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수치해석 자료(Fluent/Pumplinx)
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형 상
기존 1차년도 형상 작동유체
점성계수 : 0.008 kg/m-s밀도 : 800 kg/m3
사용코드FLUENT 6.3.6 with UDF
목적베인 펌프의 해석 성능 평가Pumplinx 및 실험과 비교
경계조건입구 : Pressure Inlet (0 Pa)출구 : Pressure Outlet (0 Pa)베인 회전수 : 1000 ~ 4000rpm
축심 변화로 인한 Case구분Case1 : 3.408039 mm Case2 : 2.982 mmCase3 : 2.556 mmCase4 : 2.13 mmCase5 : 1.7040195 mm
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속도 및 압력(Case1)
3000rpm(압력) 3000rpm(속도)
4000rpm(압력) 4000rpm(속도)
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Rpm별 압력(Pa)
1000rpm
3000rpm
2000rpm
4000rpm
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Rpm별 유량(Kg/s)
1000rpm
3000rpm
2000rpm
4000rpm
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형 상
형상 수정람다2 2-Stage Model1
작동유체점성계수 : 0.008 kg/m-s밀도 : 800 kg/m3
사용코드Pumplinx
목적베인 펌프의 해석 성능 평가
경계조건입구 : Pressure Inlet (0 Pa)출구 : Pressure Outlet (3 Bar)베인 회전수 : 1200rpm
편심Model 1 : 3.1 mm
Inlet
Outlet
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압력(Inlet)가로축 : 압력 (pascal)세로축 : Interation 횟수
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압력(Outlet)가로축 : 압력 (pascal)세로축 : Interation 횟수
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압력(Rotor)가로축 : 압력 (pascal)세로축 : Interation 횟수
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소음 주파수 분석 자료(Cool edit)
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소음 진동
1. 시험 결과 - FFT Contour
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150dB7 14 21 28
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2. 시험 결과 – Overall & order slice
1’st Order 2’nd Order
소음
진동
Overall
Order
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160dB(lin)
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3’rd Order 4’th Order
소음
진동
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Order
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5’th Order 6’th Order
소음
진동
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Order
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160dB(lin)
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3.Wav 파일 FFT 변환 결과
가로 축 : db , 세로축 : Hz
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21~22 hms데이터 약간 클리핑 됨
57~58 hms데이터 다수가 클리핑 됨
87~88 hms데이터 대부분이 클리핑 됨
1~2 hms데이터 클리핑 없음
가로 축 : db , 세로축 : hms
4.Wav 파일 hms별 db
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향후 연구계획
향후 연구 계획
Wav파일의 클리핑 효과로 인한 정확한 주파수 분석의 어려움
-> 마이크의 감도 조절을 통한 재실험 필요
기존 Fluent 해석 자료와 Pumplinx 해석 자료를 통한 압력 맥동 현상 관찰
주파수 분석을 통한 소음 발생 위치 및 원인 규명
해석자료 및 소음 분석 자료를 통한 해결방안모색
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Thank you