First hands on project. Seeking advice on safety

[soorkie]

hello everyone,

my name is soorkie. i am new to this field and this forum. i developed interest in gas turbine engines quite some time ago, did some readings and learnt some basic theory, however, i have zero hands on experience. finally i took the brave decision to try something on my own. 

i am having trouble in understanding what the numbers that theory tells means in real life, how much is feasible or what is safe for something that can be done in my home. please do correct me if my numbers are too big or unsafe. 

i decided to go with HX35 centrifugal compressor to get a pressure ratio of 4, an annular burner, and a suitable turbine. when i plugin the numbers, it seems like i need around 50000 rpm to get the target pressure rise. 50k seems too large, i am scared to spin something like that even at a 1000rpm. is it safe to spin at 50k? what safety measures are to be taken?

can you recommend some numbers i can start with? what are your first build specs?

thanks,
soorkie

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ps: i usually write in absolute lowercase, just that i find it comfortable. feels human, especially in this autogenerated content age.

[racket]

Hi Soorkie

To produce a 4:1 pressure ratio you'll be needing to spin the comp to >120,000 rpm , 50,000 rpm will be an idling speed

Cheers
John

[soorkie]

hi John,

thanks for correcting me. my mistake was that i plugged in diameter as radius on my calculations.
running something at 120,000 rpm max feels really scary for me to start with.

is it safe and feasible for a first build?

thanks,
soorkie

[racket]

Hi Soorkie

It might be beneficial for you to build a turbocharger based engine first to gain experience before attempting the much more complex task of building an axial engine , the turbocharge has containment built in , so much safer

Cheers
John

[soorkie]

thanks John,
i will try with a turbocharger based engine first.