Euler-Lagrange Coupling法によるEGRクーラのすす堆積シミュレーションの開発  [in Japanese] Development of Numerical Simulation on Soot Deposition Phenomenon on EGR Coolers by Euler-Lagrange Coupling  [in Japanese]

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Author(s)

Abstract

EGRのすす堆積現象を解明するため,新しい数値解析手法を開発した.ガス流れをEuler的に解き,その流れから抗力を受けるすす粒子の運動をLagrange的に解析し,その両方を組み合わせた(マルチフィジクス).その結果,すすの堆積には熱泳動が大きく寄与していることと,縦渦の生成によりすす堆積を変化させることが判明した.

The authors have developed a new numerical analysis method based on Euler-Lagrange Coupling to clarify the soot deposition phenomenon on Exhaust Gas Recirculation (referred to as EGR) cooler for diesel engines. Cooled EGR system with a heat exchanger (EGR cooler) for diesel engines has been used for emission improvement for a long time. Since diesel engines tend to generate much soot, however, the performance of the EGR cooler is likely to decrease due to the deposited soot. The flow of EGR gas is computed by Eulerian method and the soot particles are simulated due to Lagrangian approach. Because this new analysis is combined the merits of each method, the present authors call this procedure as Multiphysics simulation. The trajectory of soot particles was analyzed and the situation of accumulation by thermophoretic force was clarified. Then changes in heat transfer due to deposited soot were compared in various fin shapes. The authors found that the thermophoretic force and the generation of longitudinal vortices are important for reasonably simulating the soot deposition phenomenon.

Journal

  • Transactions of Society of Automotive Engineers of Japan

    Transactions of Society of Automotive Engineers of Japan 49(5), 1032-1037, 2018

    Society of Automotive Engineers of Japan

Codes

  • NII Article ID (NAID)
    130007486184
  • NII NACSIS-CAT ID (NCID)
    AA1260263X
  • Text Lang
    JPN
  • ISSN
    0287-8321
  • NDL Article ID
    029268986
  • NDL Call No.
    YH247-1690
  • Data Source
    NDL  J-STAGE 
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