• Title, Summary, Keyword: Passenger cabin

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An Improvement Method of Sound Quality of the High-speed Coastal Passenger Ship

  • Kim, Yoon-Seok;Kim, Sa-Soo
    • International Journal of Ocean Engineering and Technology Speciallssue:Selected Papers
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    • v.3 no.1
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    • pp.56-62
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    • 2000
  • The trends of recent passenger ships are becoming speedy and luxury style to enhance comfortableness in cabin. In order to meet these trend, ship designer has to improve the sound quality as well as to reduce the sound pressure level in cabins. In this paper, the trend of noise and sound quality of real high-speed coastal passenger ships are measured and analyzed, while running on their regular courses. The sound quality parameters such as loudness, roughness, fluctuation strength, and sharpness are evaluated by Zwicker loudness calculation. In addition, we try to find sensitive critical frequency band for the improving sound quality by using signal editing. Finally, the expected effective design methods are proposed to designer for the improving sound quality of passenger ships.

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Aerodynamic analysis for train operation without the effect of the passenger ear-discomfort in tunnel of new Seoul-Chunchon line (경춘선 1급 신설터널에서 열차승객의 이명감 없이 주행 가능한 열차속도에 대한 연구)

  • 김동현
    • Proceedings of the KSR Conference
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    • pp.495-502
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    • 2000
  • For the tunnel design of the first class on new Seoul-Chunchon railway, we investigated for train speeds to run through tunnels without ear-discomfort of passenger in cabin by application of numerical analysis. Also we analyzed the effect of the wind speed induced by train in tunnel that is very harmful to the workers on railroad and the effect of the air-pressure fluctuations which get the fatigue to the tunnel lining and the car body.

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3-D Numerical analysis of flow and temperature field in the cabin of the automobile with defrost nozzle discharged air (Defrost nozzle의 영향을 고려한 3차원 승용차 실내 유동 및 온도 해석)

  • Kang Kyu-Tae;Bae In-Ho;Hwang Ji-Eun;Park Warn-Gyu
    • 한국전산유체공학회:학술대회논문집
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    • pp.31-36
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    • 2001
  • The velocity and temperature profiles in the cabin of the automobile affect greatly to the comfort of the passenger. In this paper, the three dimensional flow and temperature analysis in the cabin of the automobile which is geometrically complicated was performed to investigate and predict the velocity and temperature profile. The three dimensional Navier-Stokes code used in this case was validated by performing of a 1/5 experimental scale model vehicle flow anal)rsis successfully. The temperature field of cavity was analyzed for Energy-equation code validation. The comparison of the results are made with the polished computational data and give a coincided one.

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A Study on the Reality of Coastal Passenger Ship Transportation Service and Some Proposals for Improving Its Management (연안 여객 수송 서비스의 실태와 경영 개선 방향)

  • 김길수;임종길
    • Journal of the Korean Institute of Navigation
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    • v.20 no.2
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    • pp.33-50
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    • 1996
  • The routes of coastal passenger ships are important in the light of both economic and social view point. Islands around the Korean peninsular can be actually dominated by linking them with land by the ships. The service quality of the route is not high enough to satisfy habitants in the islands. The income of the service-users is increasing so that they expect better service in terms of ship's speed and cabin. The reality is not, however, good to motivate ship-owners to replace aged ships with new and large ones. The situation is caused by low passenger-fare and inefficient management. Therefore the fare should be raised and the fare system should be innovated. And the number of passenger ship companies should be reduced from 42 to 20 by merger and acquisition.

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A Study on the Multi-Channel Active Noise Control for Noise Reduction of the Vehicle Cabin II : Semi-experiment (자동차 실내 소음저감을 위한 다채널 능동소음 제어에 관한 연구 II : 모의 실험)

  • Kim, H.S.;Lee, T.Y.;Shin, J.;Oh, J.E.
    • Transactions of the Korean Society of Automotive Engineers
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    • v.2 no.6
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    • pp.29-37
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    • 1994
  • Active noise control of random noise which propatate in the vehicle cabin as a form of spherical wave is the target of this study. In the previous study, the adaptive algorithm for adaptive controller is presented for the application in active noise control system. And for the preliminary study of adaptive active noise control in vehicle cabin as a real system, a computer simulation is performed on the effectiveness of the adaptive algorithm in the amplitude of the pressure fluctuation. This work studies the implementation of multi-channel feedforward adaptive algorithm for the reduction of the noise inside a vehicle cabin using a number of secondary sources derived by adaptive filtering of reference noise source. Multi-channel adaptive feedforward algorithm are verified in numerical simulation and semi-experimental justification of developed system is made on a domestic passenger car. In the results of semi-experimental study, the noise of specific region in the interior of automobile are reduced for the appreciabe sound pressure level in the operating engine rpm and finally this study suggests the capabilities of the real time active noise control in 3 dimensional acoustic fields.

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A Research on the Cabin Service Quality Factors in a National Carrier affecting Overseas Tourist's Experience and Satisfactiont (여객의 해외여행 관광지 관광체험과 관광만족에 영향을 미치는 국적항공사 객실서비스 품질 요인 연구)

  • Yoon, Han-Young;Jang, Ji-Seung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.9
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    • pp.188-197
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    • 2019
  • This study analyzed empirically the effects of the perception of outbound passengers, who flew from Korea to overseas tourist destinations, on the cabin service quality, tourist experience, and tourist satisfaction. For empirical analysis, a survey was given to Korean passengers using a national carrier of South Korea. Based on empirical analysis, the researchers judged that the analysis results and implications could be applied to inbound foreign passengers who visited Korea for the tourism purposes if researchers generated significant results from empirical analysis. This paper designed a research model that represented the meaningful relationship among, airline cabin-service quality, tourist experience, and tourist satisfaction following preceding research. According to the analysis, that factors that consisted of the cabin service quality had a significant effect on the tourist satisfaction with a mediating effect of both the cognitive and emotional tourist experience. Therefore, the perception on airline's cabin service quality of the national carrier would be a starting point that can help improve the tourist satisfaction.

NUMERICAL STUDY ON PERFORMANCE ASSESSMENT AND INSTALLATION CONDITIONS OF AN AUTOMOTIVE AIR CLEANER (자동차용 공기청정기의 성능 평가 및 설치 조건 도출을 위한 수치해석적 연구)

  • Lee, Y.H.;Seo, J.W.;Park, J.H.;Choi, Y.H.
    • 한국전산유체공학회:학술대회논문집
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    • pp.263-270
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    • 2010
  • In this study, an air cleaner is considered to improve comfort, safety, and health of automobile passengers. The performance and installation conditions of the air cleaner have been studied to investigate their effects on the air quality in the cabin room using numerical analysis. A five-passenger sedan and a seven-passenger minivan that have comparatively large indoor volume have been considered. The distributions of the local mean age and the volume averaged age of indoor air are calculated according to the variation of the placement and the air flow of the air cleaner. In addition, a decrease of contamination concentration, especially VOCs(volatile organic compounds), by the air cleaner is numerically analyzed with time-accurate unsteady calculation to quantify the effect of the air cleaner on the indoor air quality. As a result, the effective installation and operation conditions of the air cleaner for the automobile cabin room could be suggested.

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