限流沿对撞壁射流近壁区混合过程影响的实验研究(二)

• 作 者: 林荣文 苏万华 谢辉 史绍熙
• 机 构: 天津大学内燃机燃烧学国家重点实验室!天津,300072,天津大学内燃机燃烧学国家重点实验室!天津,300072,天津大学内燃机燃烧学国家重点实验室!天津,300072,天津大学内燃机燃烧学国家重点实验
• 出 处: 工程热物理学报
• 发表日期: 1998年01期
• 关键词: 耗散率 限流 混合率 对撞 燃烧反应 扩散火焰 扩散燃烧 燃烧区 燃烧速度 燃烧化学

The spatial distribution of concentration and velocity of a gas jet impinging with abump is studied in this paper. The conception of mean dispersion rate of concentrationis employed to describe the mixing process of gas jet in the near wall. The result showsthat the radial non-dimensional distribution of concentration and velocity of the second jetare normal, the axial nonudimensional distribution of concentration is exponential and theaxial non-dimensional distribution of velocity is lineal. The mixing rate of the jet gas in thenear wall is enhanced because of the existence of the bump. Base on these results, a new“space-wall-space” mixing conception for small or medium D.I. diesel engine is proposed.

The spatial distribution of concentration and velocity of a gas jet impinging with abump is studied in this paper. The conception of mean dispersion rate of concentration of employed to describe the mixing process of gas jet in the near wall. The result show that the radial non-dimensional distribution of concentration and velocity of the second jetare normal, the axial nonudimensional distribution of concentration is exponential and theaxial non-dimensional distribution of velocity is lineal. The mixing rate of the jet gas in thenear wall is enhanced because of the existence of the bump. Base on these results, a new “space-wall-space ” mixing conception for small or medium DI diesel engine is proposed.