27772nd poster gets a cookie (cookie thread (Part 7)) (Part 10)

[May]

Look, I get it, you didn’t like that one. You can also describe the relative advantages and disadvantages of a dual-beam-in-space instrument versus a dual-beam-in-time instrument

[May]

[Atlas]

one is better for monochromatic viewing purposes and one is better for all around

[May]

And you STILL haven’t answered my awesome engineering question

[May]

Essentially true

[Atlas]

you pay to have the opportunity to do this?

[benguinedparbecue]

what is orange even here for if not to answer awesome engineering questions

[Atlas]

providing an unwavering level of unease upon sight

[Atlas]

benguined ask a question

[May]

Is it better for somebody to dedicate their life to a “practical” pursuit (let’s say oncology) than an “impractical” one (making art)? Do you personally feel any obligation to do the former, and do you think others should?

[benguinedparbecue]

is the purpose of an entity what it does?

consider this my question

[Atlas]

hmhmhmhmhm

[May]

@May

Does anyone have any insights on how to quantify/predict compressur surge in radial compressors? Beyond just CFD ;-; i don’t wanna run one million ansys sims. are there any rough workflows? Also, does anyone have experience in blade design? How much of an isentropic efficiency loss can i expect from making the blades have sub-optimal loadings? Obv the LE is angled/placed for minimum mach and to align with the flow, but they might end up being straight lines bc log spirals aren’t giving me the pressure ratio i want.

@May

I got good, obviously. Now answer my questions >:( i read a random guy’s master’s (he’s a scrub) on doing some basic inverse design, but that’s purely euler eqs and so doesn’t include losses. I was thinking of coupling an inverse euler design routine with a full CFD to optimize for losses (IE have a couple control points for the loading instead of a ton for the blade shape directly) but idk if that helps with surge. Esp. since it’s a BL/separation phenomenon, I have concerns about numerical methods’ ability to predict the surge point anyways

@May

I have a similar problem with the bladed diffuser tbh, i can do simple diverging channels but that has like an isentropic efficiency of 80% (empircal) which sucks. But i don’t also want to deal with doing inverse design there, and besides the incoming flow is unsteady and fucked so it’s hard to run CFD on it anyways.

@May

The turbine design should be easier but might be hard to manufacture, since i can’t as easily get away with the 2d design. Does anyone know if a radial turbine is any good?

Nobody is answering MY really GOOD question that I asked

[Atlas]

it depends on what you qualify as “what it does”
i’m gonna go with no though, especially for complex entities like humans

[benguinedparbecue]

we need artists so the oncologists can unwind in their free time

[Atlas]

it depends on demand for each

[Atlas]

second answer is no and no given current market

[soweli]

No

[soweli]

No no yes

[benguinedparbecue]

also for that specific example there’s an artificial scarcity of doctors - more people want to be doctors than are allowed to be doctors. so there’s like basically no guilt in not wanting to be one

also a surgeon who isn’t actually passionate about what they do is presumably more prone to error