期刊
APPLIED THERMAL ENGINEERING
卷 159, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2019.113848
关键词
Port fuel injection; Spray impingement; Cross-flow; Wall temperature; Spray tip penetration; Impinged spray height
资金
- National Key Research and Development Program of China [2018YFB0105900]
In this work, an experimental study on the effects of the impingement geometry, the cross-flow intensity and the wall temperature on the characteristics of an impinging port fuel injection (PFI) spray was conducted. The transient development of the impinging spray was recorded by a high-speed camera with Mie scattering. Based on the high-speed images, the spray tip penetration (S) and the impinged spray height (H-w) were obtained. The results show that with the increase of the impingement distance (L-w), S increases and H-w decreases at the same time after the impingement. As the impingement angle (theta(w)) increases, S decreases while H-w first increases and then decreases. With the increase of the cross-flow velocity (U-c), less part of the spray impinges onto the wall, and S significantly increases. As the wall temperature (T-w) rises, S does not show much variation. However, H-w increases gently for T-w lower than 420 K, and it increases sharply for T-w higher than 420 K due to the Leidenfrost mechanism. The effects of the above factors (L-w, theta(w), U-c, T-w) on S and H-w were finally evaluated and compared through the introduction of a contribution index.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据