基于PIV技术的双旋流燃烧室冷态流场测量

Measurements of Two-stage Swirler Combustor Cold Flow Field Based on PIV Technology

为了掌握双旋流燃烧室流场特性,利用粒子图像测速仪(PIV)对双旋流、低排放燃烧室的冷态流场进行测量。并对流场在不同供气压降、不同测量截面上的分布特性进行试验研究。结果表明:随着进气速度的增大,回流区的面积及回流强度有所增加,回流区长度变长,燃烧室头部气流更稳定,燃烧效率更高。随着距旋流器出口距离的增加,截面上环形流场的强度有所减弱。研究结果为进一步研究利用多级旋流器实现燃烧室内稳定燃烧并降低排放提供了重要依据。

In order to master the flow field characteristics of the two-swirl combustor,a particle image velocity (PIV)was used to measure the cold flow field of the two-swirl and low-emission combustor.A test study on the distribution characteristics of flow field on different gas pressure drops and different measuring sections was carried out.The results show that with the increase of intake velocity,the area and intensity of reflux zone increase,the length of reflux zone becomes longer,the flow at the head of combustor is more stable,and the combustion efficiency is higher.With the increase of the distance from the outlet of the cyclone,the intensity of the annular flow field on the section decreases.The research results provide an important basis for further study of using multistage swirler to realize stable combustion and reduce emissions in combustor.