So me and my group mates in university got a lockwood hiller valveless pulsejet manufactured, and there was one error in manufacture. We are having trouble with trying to start the engine as demonstrated in the attached link. Is there an error in the engine you can see? One manufacturing error we identified is that the exhaust cone is slightly at an angle and is not exactly parallel to the combustion chamber+intake which looks something like the attached. Could making it parallel solve it? Also, would putting the gas cylinder upside down solve it?
The key to the operation of a valveless pulse jet is the oscillating shock wave created by repeated explosions in the combustion chamber. In this video they talk about using a spark plug to trigger these explosions initially, and once the engine is running the process is self sustaining.
Looking at your video I don't see any connections to the engine except the fuel pipe, and you seem to be attempting to start the engine by pushing some burning material into the combustion chamber. This will not create an explosion, so the shock wave that keeps the engine running won't be created either.
To my eye, comparing with memory of many YouTube videos, the conical ends of the combustion chamber are too short and the bends in the exhaust pipe are both too small radius and the pipe is slightly flattened at those bends.
The angle of the exhaust pipe shouldn't matter -- I've seen these build completely straight and gotten to run -- but the sharp bends will produce out of phase shock wave reflections, and the too-short ends on the combustion chamber may also have a negative effect on the resulting gas compression.
This "university" project may have made an old mistake of scaling up before the design parameters were properly set.
A pulse jet, theoretically, is a truly amazing engine that uses an invisible piston to compress the next batch of air and fuel, a resonant shock wave. A properly shaped "tuned pipe" must be made or it simply will not run effectively.
So you may wish to start with a smaller, more reliable r/c model pulse jet as a demonstrator, rather than trying to get that monster to run.
Once experience is gained, move on to scale, keeping in mind the risk factors.
Tuned pipes also have application in increasing the output of 2 cycle engines by reducing losses of fuel and air out the exhaust port as the cylinder recharges for the next power stroke.