Ke hoʻokumu ʻia ʻana o nā Blade Propeller A me kā lākou mau hiʻohiʻona Geometric ma ka ʻāpana

No ka mea he ʻāpana manuahi ka peʻahi moana, paʻakikī kēia ʻano. E hoʻolālā i ka hoʻolālā mīkini o ka propeller, pono mua mākou e kālailai i kāna mau ʻano geometric. ʻO nā propellers kumu, e like me nā wili, i hoʻokahi a ʻelua paha huli a puni ka ʻōpala. Ma hope ua ʻike ʻia inā inā lawe ʻia kahi ʻāpana o ka ʻili hoʻoliʻiliʻi ma kahi o ka pōʻai piha, e māhuahua ka maikaʻi. Ua ʻoi aku ma mua o 100 mau makahiki o ka hana hana e hana i kēia kinona i kēia lā. ʻO ke ʻano hoʻolālā nui o ka propeller ka ʻano palapala ʻāina, ʻo ia hoʻi, hoʻokō ʻia ka hoʻolālā ma o ka palapala ʻāina i kahaki ʻia e like me nā hopena hoʻokolohua o ka hoʻohālike propeller. Wahi a ka palapala ʻāina hoʻolālā, ka nā propellers mīkini ʻo ia ka nui o nā propellers ʻano B, nā propellers ʻano AU, a me nā propellers ʻano SSPA.

Ke hoʻokumu ʻia ʻana o nā Blade Propeller

ʻO ka pae kaomi o ka lau propeller kahi ʻāpana o ka ʻili lolo. Hoʻokumu ʻia ka ʻili spiral e ka pahu kaʻa ab e kaʻapuni ana a puni ke axis OO1 o ka propeller hub, a ma ka manawa like e neʻe i luna ma OO1 me ka wikiwiki mau, e like me ka hōʻike ʻana ma FIG. 1. ʻO ka locus o ka neʻe o kekahi kiko ma ka laina hanauna he wili. 

Ke nānā ʻia i ke ala o ke koʻi, ʻo ka ʻoniʻoni kahi arc. Ke nānā ʻia mai ka ʻaoʻao e pili ana i ke axis, he sinusoid ka spiral. 

ʻO ka mamao ma waena o kekahi kiko ma ka helix like a me ka axis paʻa OO1 mau. No laila, inā hana ʻia ka ʻili o ka ʻili me ka radius o ka spiral e like me ka radius (ʻo ke kikowaena cylindrical ka axis OO1), ua hoʻokomo ʻia ka spiral i loko o ka ʻili cylindrical. Ua kapa ʻia ke kāʻei hope o ka busbar, ʻo ia ka mea i hōʻike ʻia e ke kihi hoʻi hope ε, maʻamau ε = 5 ~ 15 °.

Nā ʻāpana ʻāpana o ka Blade

Ma muli o ka pale ʻana o nā kōmi i ka pahu o ka propeller, pono lākou i kahi mānoanoa. Loaʻa ka mānoanoa o nā pahi i ka ʻoki o ka ʻoki i nā radii ʻokoʻa, i hoʻoholo ʻia ma o nā helu mālamalama.
ʻO ka ʻili cylindrical me kahi radius R (ʻo ke kikowaena e kū like me ke kikowaena o ke kumu propeller) e pili ana i ka ʻili, a ʻo ka ʻāpana ʻoki ʻia ka ʻili o ka ʻili. Ke nānā nei i ke ala o ka axis hulu, ʻo ka mokulele ʻoki kahi ʻāpana o ke arc me kahi radius R, a ʻaʻole ia he laina pololei. 

ʻElua ʻano ʻāpana o ka lau: airfoil a me ke kakaka, e like me ka mea i hōʻike ʻia ma ke Kiʻi 2. ʻO ka mamao b ma waena o nā welau ʻelua o ka mokulele tangent ua kapa ʻia ʻo ka laula o ka laulima ʻauʻau. mokulele. Hōʻike ʻia ka mānoanoa kiʻekiʻe o ka ʻāpana e t. 

ʻO ka mānoanoa kiʻekiʻe loa o ka ʻāpana arch-like ma waena, ʻo ia hoʻi, b / 2. ʻO ka mānoanoa kiʻekiʻe o ka ʻāpana airfoil ma kahi o kahi hapakolu o ka laula chord mai ka ʻaoʻao alakaʻi, ʻo ia hoʻi, ma kahi o b / 3. ʻAʻole mau ke kūlana o ka mānoanoa kiʻekiʻe o kēlā me kēia ʻāpana o ka lau. 

Ua kapa ʻia ka ratio o ka mānoanoa kiʻekiʻe i ka laula o ke kaula i ka ratio mānoanoa, a ua hōʻike ʻia e δ, ʻo ia hoʻi, δ = t / b. δ hōʻike i ke kēkelē o ka momona a me ka lahilahi o ka ʻāpana, a nui ka δ hōʻike he mānoanoa a ʻikiʻī ka ʻāpana

loulou i kēia ʻatikala: Ke hoʻokumu ʻia ʻana o nā Blade Propeller A me kā lākou mau hiʻohiʻona Geometric ma ka ʻāpana

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