论文部分内容阅读
对跨音压气机Rotor35进行单通道全三维定常/非定常数值模拟,并与试验总性能和流场分布对比校核了数值计算精度。以此为基础开展的近失速工况点的非定常计算发现,来自相邻叶片通道未形成泄漏涡的间隙泄漏流体与来流、激波与泄漏涡干涉形成的低能破碎区相互作用形成了叶尖二次涡。叶尖二次涡向下游运动过程中,其所处的位置和产生的阻塞影响了近叶顶载荷的分布,最终使得叶尖部流场出现了循环往复的自维持的非定常波动现象。
The single-channel full three-dimensional steady / unsteady numerical simulation of the transonic compressor Rotor35 was carried out and the numerical accuracy was verified by comparison with the experimental performance and flow field distribution. Based on this, the unsteady calculation of near-stall operating point shows that the interstitial leakage fluid from the adjacent vane passage does not interact with the low-energy crushing zone formed by the incoming flow and the shock wave and the leakage vortex to form the leaf Sharp second eddy. During the secondary vortex flow, the position and the obstruction of the tip vane affected the distribution of the near-tip loads. Finally, the unsteady cyclic and reciprocal self-sustained fluctuations in the tip flow field were observed.