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림 구동 일체형 추진장치의 유체역학적 특성에 관한 수치적 연구
정성문(Seongmun Jung),박정훈(Jeong-Hoon Park),최재엽(Jae-Yeop Choi),하성준(Sung-Jun Ha),권오준(Oh Joon Kwon) 한국전산유체공학회 2019 한국전산유체공학회지 Vol.24 No.1
In this paper, the hydrodynamic characteristics of a rim driven integrated thruster was numerically investigated. To consider the effect of cavitation phenomenon, multi-phase flow model and homogeneous mixture model were applied to the three dimensional incompressible RANS equations. To validate the numerical methods and the models adopted to the present study, the propeller P4381 was numerically analyzed and the numerical results and experimental one reached good agreement. The rim driven integrated thruster applied to the unmanned underwater vehicle at the water depth of 5m was numerically solved for various advance ratios. The flow field of the conventional thruster that has gap between the tip of the propeller and inner wall of the duct was also numerically solve and the results were compared to the results of the rim driven integrated thruster. As a result, it was revealed that both the rim driven integrated thruster and conventional thruster suffer from the cavitation phenomenon on the suction side of the propeller and the stator. It was also found that the difference of the thrust generated by the rim driven integrated thruster and conventional thruster is not significant whereas the difference of the torque could not be neglected. Finally, it was observed that the thrust and torque by thruster in the multi-phase flow was estimated to be smaller than those of single-phase flow.
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FCST의 음양균형장치를 활용한 경련성 사경증 증례보고
손인철 ( In Cheol Shon ),안규석 ( Kyu Suk Ahn ),손경석 ( Kyung Seok Sohn ),고기완 ( Gi Wan Koh ),인창식 ( Chang Shik Yin ),하성준 ( Sung Joon Ha ),이영준 ( Young Jun Lee ) 대한경락경혈학회 2006 Korean Journal of Acupuncture Vol.23 No.4
본 증례에서는 후천성으로 나타난 경련성 사경증 2례에 대해 외래 진료로 각각 3개월(91일간 54회), 5개월 반(167일간 90회)동안 FCST의 음양균형장치를 주 치료수단으로 하고 침구치료, 도수치료, 약물치료를 보조 치료수단으로 하여 치료하였다. 2례 모두 시각적 상사 척도(VAS)를 적용하여 평가해보았을 때 완전한 호전이 이루어졌다고 판단되었고, 임상적 관찰과 환자의 주관적 구술에서도 모든 증상의 소실과 정상 회복을 확인하고 치료를 종료하였다. 이후 각각 5개월에서 10개월간 추적 관찰한 결과 모두 정상적인 생활을 하고 있음을 확인하고 치료 효과의 정상 유지를 관찰했다. 이로써 아탈구된 상부경추와 뇌신경계 및 경락체계의 불균형과 경련성 사경의 유의한 관련성을 유추해볼 수 있었으며, 이의 회복에 음양균형장치를 활용하여 악관절의 다차원적인 이상적 음양중심균형위치를 찾아줌으로써 척추를 비롯해 뇌와 경락체계를 조절해줄 수 있다는 FCST의 치료원리가 유의한 결과로 입증된 경우라 사료된다. Objectives: Therapeutic effect of Balance Appliance of functional cerebrospinal technique (FCST) for meridian and neurologic yinyang balance was observed in two refractory torticollis cases. Methods: A unidentified severe torticollis two cases with several months of duration was managed by the Balance Appliance on temporomandibular joint (TMJ), combined with acupuncture and manual medicine. Results: Assessment was made by self assessment of subjective symptoms and clinical observation. The patient reported over-90% remission and returned to ordinary daily Life after 3∼5 months of therapy, which effect was reported to maintain for 6 months. Conclusions: An impressive effect was observed and further clinical and biological research on FCST is expected.
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