%0 Journal Article
%T Effects of modified micro
%A Haiyang Kuang
%A Haoguang Zhang
%A Shan Ma
%A Wuli Chu
%A Xiangjun Li
%J Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
%@ 2041-2967
%D 2019
%R 10.1177/0957650918790018
%X In the current study, the effects of micro-vortex generators on the flow characteristics of a high-load compressor cascade are investigated, and four types of micro-vortex generators including ¡°rectangular,¡± ¡°curved rectangular,¡± ¡°trapezoidal,¡± and ¡°curved trapezoidal¡± are considered and named VGR, VGCR, VGT, and VGCT separately. The calculated results show that a rising reverse flow region, which is considered a main reason for occurring stall at +8¡ã incidence, collapses rapidly from the leading edge in the cascade. Therefore, the micro-vortex generators are all mounted on the end-wall in front of the passage to suppress the development of the secondary flow, and the stall occurrence is delayed from +8¡ã to +11¡ã incidence by applying VGCT. At the design condition, the VGT can make the total pressure loss decrease by 0.54%. The modified micro-vortex generators show an obvious superiority when the range of incidence is between +3¡ã and +8¡ã. At the stall condition, the VGCT can make the total pressure loss decrease by 9.36%. Moreover, the reduction of the secondary flow loss is considered a main goal of the adoption of micro-vortex generators which is an achievement for decreasing the total pressure loss, and the highest reduction of the secondary flow loss reaches 34.6% at the stall condition in the cascade with VGCT
%K High-load compressor cascade
%K modified micro-vortex generators
%K numerical simulations
%K passive control devices
%U https://journals.sagepub.com/doi/full/10.1177/0957650918790018