Boundary layer separation control on a highly-loaded, low-solidity compressor cascade

Abstract

Separated flow can be effectively controlled through the management of blade boundary layer development. Numerical simulations on a highly-loaded, low-solidity compressor cascade indicate that combined blowing and suction flow control technique can significantly improve cascade performance, especially in increasing the cascade loading and static pressure ratio as well as decreasing the loss coefficient. Meanwhile, it is more effective to improve cascade performance by blowing near leading edge on suction surface than suction near trailing edge.Both the locations and flow rates of blowing and suction are major impact factors of this method to cascade performance. Comparing to the baseline, the static pressure ratio increases by 15% and loss coefficient decreases by 80%, with a blowing fraction of 1.7% and a suction fraction of 1.38% of the inlet mass flow.

Simulation and Experimental Study on Active Flow Control Strategy for a Compressor Cascade with Coanda Jet Flap

“…Flow separation control methods for aeroengines can be classified into two categories: passive control methods, such as vortex generators (Zheng et al 2015), and blade-end treatments (Moon et al 2001;Zheng et al 2016), and active control methods, such as air blowings (Nerger 2012;Lee et al 1989), boundary layer suction (Gbadebo et al 2008;Zhou et al 2010), pulsed jets (Lu et al 2021), synthetic jets (Esnault 2020), and plasma actuations (Li et al 2010). Compared to passive control methods, active control methods offer greater flexibility and can be adjusted according to different flow state.…”