I believe the blue needs a PWM pulse in order for that fan to spin up. If you apply 12V there too, that may do the trick. Or may need to ground it. You may be able to power it directly from your PSU, but still take a PWM pulse from a motherboard fan header.
I'd think you know but I will say it here for everyone anyways: Connecting the WRONG wires of a fan to a power supply can worst-case burn up the fan and or melt wires and best case but less likely trigger the PSU protection before there is a bunch of smoke. If the PSU does go into protect your fan will still most likely be ruined though. It could also potentially damage the insulation on your power supply wires.
About ten years ago I put a PC /w i5 750 into a PowerMac G5 chassis and re-used all the original high-power delta fans. To power them up, I grounded the grounds, and then put the PWM and 12V wires to the center pole of a two way toggle. One way was 5V other way was 12V. So all the fans were roughly 40% or 100% depending which way you threw the switch. It was ALWAYS at 5V, and worked out perfectly that way. Not loud, plenty of air.
If it was ME, and I didn't pay anything for these fans and was not too worried, I'd use a PSU with >10A on the 12V rail and nothing else connected. Hook the known +12V and Grounds up, power up the power supply, then quickly touch the PWM (Blue) wire to +12V. If the fan rotates, you're good. If not, try something else (so long as it makes sense).
EDIT: here is a YouTube video talking about running these fans without MB pwm control:
I didn't have time to watch the whole thing, but I saw enough to see that this will help you
My method described above should also work. Worked for me on high-amp delta server grade fans.