• Home
  • About CICEE
  • Editorial Board
  • Publication Ethics
  • 中文

    • Limits and Effects of Similarity Ratio in Scaled Model Experiments of Marine Low-Speed Diesel Engines
    DOI：10.13949/j.cnki.nrjgc.2021.02.002
    Key Words:diesel engine  scaled model experiment  similarity limit  heat transfer loss  combustion  emission
    Author NameAffiliation
    ZHOU Xinyi, LI Tie 1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
     2. Institute of Power Plants and Automation, Shanghai Jiao Tong University, Shanghai 200240, China 
    Hits: 2593
    Download times: 1226
    Abstract:In order to study the application of scaled model experiments in marine diesel engines, the limit of similarity ratio was clarified based on a marine low-speed diesel engine with 340 mm bore diameter. Then, the similarity of heat transfer loss, in-cylinder temperature distribution, in-cylinder pressure, heat release rate, indicated thermal efficiency and emissions was studied under different similarity ratios with three scaling laws. The results show that the in-cylinder pressure, indicated thermal efficiency and normalized NOx emissions increase with the increase of bore diameter, while the normalized soot emissions decrease with the increase of bore diameter. The prediction accuracy of the scaled model experiments decreases with the increase of the bore diameter difference, and the exponential function can be used to reflect the relationship between the design parameters and similarity ratios.
    View Full Text  View/Add Comment  Download reader