Heat Transfer Mechanism of Solid Combustion by Mulitple Impinging Jets Involving both Flow and Reaction Field

为了研究多个冲击氧化剂射流的射流间距对固体可燃物燃烧速度的影响，对不同射流间距的喷嘴进行了实验研究。主要成果如下：1.根据喷嘴间距的不同，双冲击氧化剂射流的燃烧速度横向分布完全不同。通常，对于间距较大的喷嘴，获得最大燃速的点被移到外面。燃速与雷诺数的关系也得到了证实。在非燃烧情况下，燃烧率与雷诺数的0.5次方成正比，并与滞止区的换热特性有关。另一方面，对于较大的射流间距，狭缝下方的燃烧速率与雷诺数的0.8次方成正比。

To investigate the effect of jet-to-jet spacing of multiple impinging oxidizer jets on burning rate of solid combustibles, experiments with different jet-to-jet spacing nozzles were performed. Main achievements are as follows.1. Lateral profiles of burning rate using double impinging oxidizer jets were entirely different depending on spacing of the nozzle. Typically, the point at which maximum burning rate was obtained was shifted outside for the wider spacing nozzle.2. The Dependence of burning rate on Reynolds number was also shown. As well as heat transfer dependence in the stagnation region of non-combustion case, the burning rate was proportional to Reynolds number to the power of 0.5. On the other hand, the burning rate just below the slits for the case of wider jet-to-jet spacing was proportional to Reynolds number to the power of 0.8.