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Pheonix 𝕏
@Xaraphim
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Mechanical Design Engineer | A&P Student | ✝️ | Doing CAD Till 5 in the morning | See highlights tab for projects ⚙️🔬🧪
United States
Joined October 2023
brief breakdown of the combustion chamber system i’ve been working on. the design incorporates regenerative cooling where the jet a fuel (at 2~4 bar) flows through a channel, absorbing heat from the chamber walls (10-15mm). based on the math, the fuel absorbs ~172 kW of heat, with a temp rise of about 90°F, preheating it to ~190°F before injection. i’m still debating whether to pump the fuel to a radiator for extra cooling or just let it flow straight back into the stream. while 190°F isn’t exactly “cool”, it’s a hell of a lot cooler than the combustion chamber temps, so it still does its job. note: my physical model doesn’t include this regen cooling aspect yet since i’m still experimenting with different configurations and seeing what works best.”
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@DanielleFong it’s to late for me to even read this but A BIOLOGICAL LASER ????? WHAT @jwt0625
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your formula yields about 29 j because you used 1000/min directly instead of converting rpm to rad/s. 1 rpm equals 2π/60 (0.10472) rad/s, 1000 rpm is 104.7 rad/s. if you convert 20 lb to 9.07 kg and 6 in to 0.1524 m and 104.7 rad/s, the energy is 0.5 × 9.07 kg × (0.1524 m)² × (104.7 rad/s)² = 1155 j, 29 j result comes from treating rpm as if it were in rad/s. Sidenote, I failed an exam because of this exact same thing
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@svueijsbz your right , let’s assume it’s a 12 inch wheel then , of my math is right it’s around 1100j
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