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    국내학술지 제목 게시판 내용
    제목(국문) An improved numerical analysis of the transient oil de-congealing process in a heat exchanger under low temperature conditions
    제목(영문) An improved numerical analysis of the transient oil de-congealing process in a heat exchanger under low temperature conditions
    저자 - (Jaehyun Park ,School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Busan, Korea ) ▷공저자네트워크등록하기
    - (Foster Kwame Kholi ,School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Busan, 46241, Korea ) ▷공저자네트워크등록하기
    (Man Yeong Ha ,Department of mechanical engineering, Pusan National University (myha@pusan.ac.kr) ) ▷공저자네트워크등록하기
    - (June Kee Min ,Schoolof Mechanical Engineering, Pusan National University ) ▷공저자네트워크등록하기
    - (Michael Klingsporn ,Rolls-Royce Deutschland Ltd. & Co. KG, Eschenweg 11, 15827, Blankenfelde-Mahlow, Germany ) ▷공저자네트워크등록하기
    - (Jason Chetwynd-Chatwin ,Rolls-Royce plc, Whittle House, WH-42-P. O. Box 3, Filton, BS34 Bristol, 7QE, Bristol, UK ) ▷공저자네트워크등록하기
    초록

    .

    초록(영문)

    In the present study, an improved heat exchanger model is proposed to efficiently analyze the cold oil removal process inside a fuel-cooled oil cooler. When exposed to low temperature condition, oil within a heat exchanger begins to congeal, preventing oil flow and causing loss of cooling. The conventional heat exchanger models, however, shows limits in reflecting the highly varying viscosity effects due to large temperature difference. To overcome this, the conventional porous media model was rewritten with the friction and Colburn j-factors that include the temperature dependent property variation. The property correction method by Shah and Sekulic [31] was added to enhance the prediction accuracy. Also, a relief valve model based on the porous media approximation is developed. The developed models were validated against the experimental data. Transient three-dimensional numerical simulations are carried out to analyze the effects of operating conditions on de-congealing phenomenon inside the FCOC.

    keyword Computational fluid dynamics
    Transient
    Fuel cooled oil cooler
    Oil congealing
    Porous media approximation
    Numerical model
    Property correction
    저널명 Journal of Mechanical Science and Technology ▷관련저널보기
    VOL 35
    PAGE 0391
    발표년도 2021
    원문파일 국문다운로드
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    • 트위터 아이콘

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