Unsteady behavior of surge and rotating stall in an axial flow compressor
Unsteady behavior of surge and rotating stall in an axial flow compressor
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DOI：
10.1007/s11630-012-0548-z
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发表时间：
2012-07
影响因子：
2.5
通讯作者：
Y. Ohta;Y. Fujita;D. Morita
中科院分区：
文献类型：
--
作者：
Y. Ohta;Y. Fujita;D. Morita
通过对单级轴流压气机非定常特性、机匣壁面压力和内部流速脉动的详细测量，对单级轴流压气机的非定常特性和叶栅非定常流场进行了实验研究。测试压缩机的主要特征是通过狭缝和同心双管直接连接到压缩机出口的容量罐，以及喷嘴，以便向转子尖端区域喷射压缩空气。研究的重点是喘振和旋转失速同时发生的过失速特性。当压缩机与容槽连接时，随着整个压缩机系统容槽容量的增加，会产生喘振并伴有旋转失速。压缩机后加装节流阀后，喘振特性发生了不规则的变化，出现了多种喘振循环。此外，通过向转子叶尖区域喷射，改变了喘振周期。结果表明，失速单元对叶栅流动的阻塞对叶栅的喘振行为起着重要的决定作用。
Unsteady behaviors as well as unsteady cascade flow fields of a single-stage axial flow compressor were experimentally investigated by detail measurements of unsteady performance characteristics and casing wall pressure and internal flow velocity fluctuations. The main feature of the test compressor is a capacity tank connected directly to the compressor outlet in series through slits and a concentric duplex pipe, and also jet nozzles in order to inject compressed air toward the rotor tip region. Research attention is focused on the post-stall characteristics of surge and rotating stall which occur simultaneously. When the compressor was connected to the capacity tank, surge was generated with rotating stall in accordance with the capacitance increment of whole compressor system. The surge behavior changed irregularly with throttling valve installed behind the compressor, and several types of surge cycles were observed. In addition, the surge cycle changed by jet injection to the rotor tip region. The results suggested that the blockages of the cascade flow which were generated by a stall cell play an important role in deciding the surge behaviors.