淡江大學機構典藏:Item 987654321/125144
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 64191/96979 (66%)
造訪人次 : 8506090      線上人數 : 7828
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧：
  • 您可在西文檢索詞彙前後加上"雙引號"，以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋，建議至進階搜尋限定作者欄位，可獲得較完整資料
    •  進階搜尋


    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/125144


    題名: An Experimental and Numerical Study on the Cavitation and Spray Characteristics of Micro-Orifice Injectors under Low-Pressure Conditions
    作者: Chen, Tzeng-Yuan;Yang, Chih-Cheng;Ouyang, Kwan
    關鍵詞: micro-orifice injector;cavitation;liquid jet;discharge coefficient
    日期: 2024-02-22
    上傳時間: 2024-03-06 12:05:15 (UTC+8)
    出版者: MDPI AG
    摘要: A fuel injector plays a crucial role in an internal combustion engine, and the occurrence of cavitation inside the injector may affect the engine’s spray characteristics, atomization characteristics, and combustion efficiency. Most literature investigated the cavitation characteristics for a micro-orifice injector under high injection pressure (P_inj) or a large-orifice injector under low P_inj, i.e., under high Reynolds number (Re). In this study, a micro-turbojet engine with a 0.3-mm-diameter micro-orifice fuel injector was developed for operation under low P_inj. The cavitation and spray characteristics of water and kerosene fuel in this injector were experimentally and numerically investigated. The results indicated that the water and kerosene also exhibited no cavitation, cavitation, super-cavitation, and hydraulic flip phenomena. However, the discharged jet was unaffected by the internal flows, and the jet angles remained approximately constant, implying that the cavitation in micro-orifice injectors under low Re is less important than that under high Re. Since the cavitation in micro-orifice injectors under low Re is not beneficial to the atomization and spray, the selection of geometry of the micro-injector is important. A micro-orifice injector with a small length-to-diameter (L/D) ratio of the injector nozzle has a rounded-edge inlet and a small taped angle due to the limitation of electrical discharge machining, which results in a high discharge coefficient and increases the difficulty of hydraulic flip. Thus, an L/D ratio of 3 is recommended for the injector of the developed micro-turbojet engine. This study provides some insights for the design of micro-turbojet engines.
    關聯: Energies 17(5), 1045
    DOI: 10.3390/en17051045
    顯示於類別:[航空太空工程學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML77檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋