驻涡燃烧室主流对凹腔涡流动的影响

Impact of mainstream on the vortex flow of cavity in trapped vortex combustor

利用粒子图像测速仪(PIV)对矩形模型驻涡燃烧室冷态流场进行了测试,分析了驻涡燃烧室主流速度及结构变化对凹腔内涡流动的影响.实验结果表明,主流速度对凹腔内涡的大小、形状、涡心位置影响不大,旋涡强度及凹腔回流量随速度增大而增大.主流无稳定器时凹腔内涡心基本居中;主流加入稳定器后,凹腔中心剖面涡较大,涡心偏向后方,稳定器剖面涡较小,涡心偏向前方.实验结果为开展热态研究打下基础.

Particle image velocimetry(PIV) was used to experimentally study the cold flow field of a model rectangular trapped vortex combustor(TVC) in this paper.The influence of mainstream velocity and mainstream structure(with or without flame stabilizer) on the behavior of vortex in the cavity was analyzed.It shows that the dimension and shape of vortex,location of vortex center are not sensitive to mainstream velocity.But the swirling strength and circulation mass flow rate in cavity increase with mainstream velo...