I need 250 m/s of airflow speed in a wind tunnel. I can assume for this purpose, the test section of the wind tunnel has uniform flow. However, the wind tunnel can only generate a flow rate of 100 m/s but the pressure can be increased. I am drawing a blank on how could a generic boundary layer wind tunnel increase pressure, and how do I relate that to the air speed? I have considered the following but I am not sure if I am thinking in the right direction: To increase pressure, design a test section to be a pipe that restricts flow in the wind tunnel near the part that has the full 100 m/s speed. This way, I can set the Bernoulli equation with initial speed 100 m/s and at atmospheric pressure, and the final speed of 250 m/s at test section absolute pressure. Thank you in advance for your help!