圆柱尾迹中气体射流平均浓度分布的实验研究

Experimental Study on the Concentration Distribution of Gas Jets in the Wake of a Circular Cylinder

本文发展了一种新的等温热线浓度测量技术，详细测量了圆柱尾迹中ＣＯ２气体射流的浓度分布，研究了空气来流速度、圆柱直径、射流初始速度、喷孔直径、喷孔间距等参数对射流浓度分布的影响；通过对大量实验数据的统计分析，拟合出了圆柱尾迹中气体射流浓度沿轴向和径向分布的经验关系式。

A new technology of constant temperature hot wire for concentration measurement is developed to measure the concentration distribution of CO 2 jets in the wake of a circular cylinder. The effects of the co flowing air velocity, the diameter of the circular cylinder, the jet velocity, the jet hole diameter and the distance between two jet holes on the concentration distribution of the CO 2 jets are investigated. A group of formulas of radial and axial concentration distribution of such kind of gas jets are derived through statistical and correlative analysis of the experimental data.