Homemade Jet Engine 4.0

Homemade Jet Engine 4.0 | test run 2

Рет қаралды 13,830

Күн бұрын

Пікірлер: 15

@grah55 Жыл бұрын

Wow, much better, but obviously there were clearance issues. Metal expands when heated and the centrifugal force on the hot metal blades caused them to stretch and shred against the sides. While writing this i started to watch your commentary at the end and you said you wanted to take off just a bit since everything is so well measured and round. I suggest you take off more than originally thought necessary for about 3 reasons. The first reason you want to take off more is because once you start getting to extremely high self sustained RPMs, that turbine ring will stretch more than you think, and the second reason is you actually want quite a bit of clearance from the outer ring to create plasma/fire flow seal when operating. It is what it sounds like, a seal around the spinning turnbine blades made of fire and hot exhaust. The seal of course is moving in the direction of the thrust as it is literally a component of it that is not spinning as fast as the thrust through the turbine blades. It will reduce the pressure and erosion received by the turbine housing. Most engines have bypass air for this very purpose but it's probably too late to implement now. It will also ensure your engine doesn't suffer from a stall which happens when turbines spin too fast and essentially stop the gas exhaust from being able to escape the combustion chamber. Another reason you want to take off a bit more is due to any possible movement, shift or warping of internal parts during run: The harmonics of the setup can result in a standing wobble waves to build up leading to wiggles and warps you would never be able to spot with the naked eye until you're once against scraping the housing. Your next test will be self sustaining from even a low speed, this is obvious. I look forward to it! Well done on everything up to this point. Make a second one then you can make a tiny Su-57!

@shanakaliyanage6875 Жыл бұрын

About a 0.2mm cold gap between the turbine and the housing should do the trick. I had the same problem, and that's how I solved it. The compressor side must have less than a 0.1mm gap. In my case, the engine didn't even start until I ensured the compressor had less than a 0.1mm gap.

@forloop7713 Жыл бұрын

Which model did you build?

@shanakaliyanage6875 Жыл бұрын

@@forloop7713 GR180

@DSTEngines Жыл бұрын

Vorab schönes Video. :) So ein dickes Turbinenrad habe ich noch nicht gesehen. 🤔Würde es schlanker designen (weniger Masse) mit einer höheren Anzahl von Schaufeln (bessere Leistungsaufnahme). Zudem scheinen die Winkel und die Geometrie der Turbinenschaufeln zur Zeit auch nicht ganz stimmig. Wenn du da noch etwas nachbesserst könnte es funktionieren. Wie hast du den Läufer gewuchtet?

@eagle1de227 Жыл бұрын

Wollte ja mal Vorschlagen die Meinung eines professionellen Turbinen Designers dazu einzuholen (auch wenn das nicht der Sinn der Übung ist). Hat sich aber wohl gerade erledigt...