<p>The effects of steady continuous blowing (SCB) and pulsed blowing (PB) through single endwall hole with low excitation momentum coefficient on the control of flow separation in a highly loaded compressor cascade are investigated experimentally using oil flow visualization and both steady and unsteady pressure measurements. First, excitation location and effects of relatively low values of the excitation momentum coefficient are examined to explore the capacity of SCB for damping flow separation and determine optimal values of the excitation parameters. With the aim of further improving aerodynamic performance, SCB with these optimal parameters is then compared with PB using the same parameters. The experimental results show that significant improvements in aerodynamic performance are achieved with SCB located near the separation region. However, the control effect of SCB becomes less effective as the excitation location moves upstream, and there is a deterioration in the flow field when the excitation is located close to the separation point. The effectiveness of SCB at relatively low values of the excitation momentum coefficient is confirmed. Even at a value of this coefficient as low as 0.1%, there is a 7% reduction in the total pressure loss coefficient. With the optimal parameters for SCB, the total pressure loss coefficient is reduced by 8.83%. PB provides more effective flow control than SCB at the same excitation momentum coefficient of 0.15% when the excitation frequency exceeds 40 Hz. With PB, the maximum loss reduction reaches 1.2% when compared with SCB and 9.85% when compared with the baseline case.</p>