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VPMM 시험을 통한 선수부에 프로펠러를 갖는 수중운동체의 조종성능 연구
신명섭(MyungSub Shin),박정훈(JeongHoon.Park),전윤호(YunHo.Jeon) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
In this research, the resistance test, the vertical static angle of attack test and vpmm test are carried out to estimate the maneuverability of underwater vehicle with ahead propeller. The vertical static test is carried out within the range of –40deg to 40deg to investigate the cross-flow drag at high incidence angles. The tests are carried out by dividing the propeller rotation into a case in which the propeller rotates at a specific rpm and a case in which the propeller rotates naturally according to the towing speed. In addition, the vertical dynamic stability index based on estimated hydrodynamic coefficients are calculated and the effect of the propeller revolution state on the index is investigated.
VPMM 시험을 통한 선수부에 프로펠러를 갖는 수중운동체의 조종성능 연구
신명섭(MyungSub Shin),박정훈(JeongHoon.Park),전윤호(YunHo.Jeon) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
In this research, the resistance test, the vertical static angle of attack test and vpmm test are carried out to estimate the maneuverability of underwater vehicle with ahead propeller. The vertical static test is carried out within the range of –40deg to 40deg to investigate the cross-flow drag at high incidence angles. The tests are carried out by dividing the propeller rotation into a case in which the propeller rotates at a specific rpm and a case in which the propeller rotates naturally according to the towing speed. In addition, the vertical dynamic stability index based on estimated hydrodynamic coefficients are calculated and the effect of the propeller revolution state on the index is investigated.
장재웅(Jaewoong Jang),김재기(Jaeki Kim),신명섭(Myungsub Shin) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
There are many treatments on surface to improve hardness. One of them. tungsten-carbide coating by H.V.O.F has good hardness and wear resistance. But after rotating shaft(Al) coated tungsten-carbide to seal rotating surface operates in sea water, corrosion occurs on sealing surface coated WC H.V.O.F. Considering corrosion, hardness, roughness of surface and porductivity, hard anodizing apply on sealing surface by verification test and research.