燃烧室头部两侧进气掺混气动特性

对一种燃烧室头部两侧进气掺混段的气动特性开展了数值仿真及试验验证,得到了掺混段在不同反压、来流马赫数、攻角及侧滑角下的性能参数和流场特征.结果表明,掺混段头部存在的横向旋涡是燃烧室火焰稳定和燃烧组织的关键,有攻角或侧滑角的情况下,掺混段的总压恢复有所下降,因此组织燃烧时应进行相应调节,以防止进气道进入不稳定工作状态.试验验证结果表明,仿真与试验的曲线规律一致,仿真研究结果可作为燃烧室设计和燃烧组织的依据.

Investigation on the mixing characteristics of combustion chamber with bilateral inlet at head

Numerical simulation and experimental verification of the mixing characteristics of combustion chamber with bilateral inlet at head were conducted in this study,the performance parameters and flow field characteristics of the mixing duct were obtained.The results show that the bilateral vortices at the head of the mixing duct is the key to ignition and flame stabilization,the total pressure recovery of the mixing duct decreases slightly under attack or yaw angle,so the combustion chamber shall allow to adjust the fuel quantity to avoid unstable working state of the inlet.It can be seen in the paper that the numerical results are consistent with the experimental results,indicating that the numerical simulation is feasible and can be used as a reference to the combustion chamber design and combustion organization.