静电网格系统在旋流燃烧器流场测量中的应用

为了解决旋流燃烧器出口气固两相流的颗粒浓度测量问题,提出能够测量大空间范围内气固两相流的静电网格法,设计了静电网格系统,并将该系统应用于测量旋流燃烧器出口的气固两相流场.研究结果表明：静电网格法能够测量大空间内的气固两相流的颗粒相对浓度场,测得结果可定性地反映实际浓度场|当内、外二次风风速保持不变时,一次风风速和给料速率的增加会导致回流区的减小.

Application of electrostatic grid system in measuring flow characteristics of a swirl burner

In order to solve the difficulty of measuring the particle concentration in the gas-particle two-phase flow out of a swirl burner, a novel electrostatic grid method was introduced to measure the particle velocity and relative particle concentration distribution in large space, and an electrostatic grid system was designed and applied to measure the gas/particle flow field downstream of the burner exit. Results show that the relative particle concentration of flow in large space can be obtained through the electrostatic grid method, and the measurement results can qualitatively reflect the real particle distribution. When the inner and outer secondary air speeds remain unchanged, the increase of the primary air speed or the feeding rate will lead to the decrease of the reflux area．