Experimental Analysis on Wall Heat Loss with Spray Flame Impingement in a Heavy-Duty Diesel Engine by High Magnification Observation


In diesel engines having heterogeneous in-cylinder temperature distribution, wall heat loss analyses of spray flame impingement region at the periphery of the piston cavity are necessary to consider the heat loss reduction and thermal efficiency improvement. This study examined a quantitative analysis of the local wall heat loss on spray flame impinged regions by high magnification combustion observation by using a single cylinder heavy-duty diesel engine equipped with top-view optical system. This high magnification and high-speed observation enable to measure the distance from the wall to the stabilized region of natural luminosity of flame which is valuable for quantitative analyses.筒内不均一温度分布を有するディーゼル機関おいて,噴霧火炎の壁面衝突部における熱損失解析は低熱損失化を検討する上で必要であるが,火炎側からの事例は少ない.本報では上方可視化観察窓を有する大型単気筒エンジンにて,燃焼室壁衝突部の噴霧火炎を高倍率で可視化することにより局所的な熱損失の定量解析を試みた.


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  • Accession Number: 01672683
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: May 15 2018 3:01PM