抄録
In this paper, we propose two-step collector as a pulsation suppression method on open jet circular wind tunnels. The experimental results show that two-step collector decreases the peak power spectrum of velocity fluctuation by 70% and that it is an effective method for pulsation suppression. On the other hand two-step collector decreases the static pressure in the downstream side of the test section, i.e. it forms a different static pressure distribution from usual collector.
