Moderator: Mike Everman
Mike Everman wrote:Hey Ganesh, I too have not been around much, but think i should. Hope all is well with you too. Looks like fun.
You might try low pressure ambient at the tail if your start condition is high at the intake. All these years, and the one thing i still want to show on a running motor is the alternating nature of intake and exhaust pulses.
We'd always look at the sound file and say "wow, the second mode is REALLY STRONG!" I think i can see it in this video.
Mike Everman wrote:Hi Ganesh, sounds like a pulsejet! A mic at the intake and exhaust would be interesting to see compared. I am particularly interested in the phase offset, is it 180 or 90? My knee-jerk is 180, but... It will tell us something about the average speed of sound in the duct.
I would like to set up a motor with daq and verify your predictions.
We'd (you'd) need to model a motor I have, though. One of my pocket jet scale ups would be ideal. With straight pipe exhausts, the next logical step would be adding ejectors and optimizing those.
Mike Everman wrote:Great, I'll dig it up today. What is your time zone?
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