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M. Sq. Rahman(라흐만),G. H. Lee(이경환),K. S. Lee(이광성),H. S. Chung(정한식),H. M. Jeong(정효민) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.10
Put Renewability and pollutant free energy source makes hydrogen energy popular rapidly. Hydrogen gas pressure which is after passing through reciprocating compressor part has high pulsation wave form. A unit, snubber is used as compressor components to reduce the harmful pulsation waveform and to remove the impurities in the hydrogen gas. An experiment has been conducted to investigate the pulsation reduction performance of different arrangement of snubber i.e. snubber array, single snubber in reciprocating compression system. The single snubber is able to reduce amplitude 55.947% ~ 58.248% (0.444, 0.786, 1.073 and 1.18 ㎪) with 0.475% ~ 1.966% pressure loss. It is found that the pressure fluctuations are reduced from 90.1977% ~ 92.6336% with pressure loss 1.5013% ~ 4.9034% for compressor operation at different speed which ensure the good performance of snubber-array as pulsation damper over single snubber in hydrogen compressing system.
소형선박용 Azimuth 추진장치의 Steering Support Flange의 최적설계에 관한 연구
손정대(J-D Son),이상재(S-J Lee),이광성(G-S Lee),정용길(Y-G Jung),최병근(B-G Choi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Recent, The propeller had high performance according as high performance of small ship. So, We has the development for azimuth thrusters. This Paper has structure improvement of steering support flange in azimuth thrusters. Steering support flange is very important part. because, Steering support flange supports all weight of azimuth thrusters. We has static & dynamic analysis of Steering support flange, and we discover the very safety. So, We has optimum design for the cost reduction. A first method of optimum design, We has the thickness reduce to 30㎜ from 5㎜. next method of optimum design, We added stiffener. and we has the structure & vibration analysis.