2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov duab ntawm tis, hu ua airfoil, yog qhov tseem ceeb ntawm no. … Qhov nkhaus thiab lub kaum sab xis ntawm lub tis nce cov huab cua uas ntws hauv qab tis, uas yog txav mus rau hauv qab thiab thawb lub dav hlau nce, tsim tsa.
Qhov airfoil tsim nqa?
Airfoil Peb tsim qhov nqa feem ntau vim yog oval arc duab. Kev nqa yog tshwm sim los ntawm kev txav ceev ntawm huab cua nyob rau sab saum toj ntawm lub airfoil.
Dab tsi ua rau nqa ntawm airfoil?
Yuav kom sib ntsib ntawm ntug kev, cov molecules mus rau sab saum toj ntawm tis yuav tsum tau nrawm dua li cov molecules txav hauv qab tis. Vim tias cov dej ntws sab saud nrawm dua, ces, los ntawm Bernoulli qhov sib npaug, lub siab qis dua. Qhov sib txawv ntawm qhov siab thoob plaws lub tshuab nqus tsev tsim tawmlub nqa.
Yuav ua li cas nqa?
Nqa yog tsim los ntawm qhov sib txawv ntawm qhov nrawm ntawm cov khoom siv thiab cov kua dej. Yuav tsum muaj kev txav ntawm cov khoom thiab cov kua dej: tsis muaj kev txav, tsis muaj nqa. Nws tsis muaj qhov sib txawv txawm tias cov khoom txav los ntawm cov kua dej zoo li qub, lossis cov kua txav dhau los ntawm cov khoom zoo li qub. Nqa ua ke rau qhov txav mus.
Aerofoil Lift yog dab tsi?
Airfoil generates lift by exerting a downward force on the air as it flows. Raws li Newton txoj cai lij choj thib peb, huab cua yuav tsum ua kom muaj kev sib npaug thiab sib npaug (nce) quab yuam ntawm lub airfoil, uas yog nqa. Cov airflow hloovkev taw qhia thaum nws hla lub airfoil thiab ua raws txoj kev uas yog nkhaus downward.
Pom zoo:
Puas rnr ua cov khoom nqa nqa?
Tso siab rau cov kws tshaj lij tsheb thauj khoom ntawm RNR Tire Express thaum twg koj xav nqa, txo qis lossis theem koj lub tsheb lossis tsheb. Nrog rau cov khoom lag luam loj thiab ntau xyoo dhau los ntawm kev paub dhau los, pab pawg RNR yuav pab nrhiav thiab nruab cov khoom nqa nqa uas tsim nyog rau koj.
Tus neeg txhawb nqa puas tuaj yeem thim nws qhov kev txhawb nqa?
Yog tias daim ntawv thov kev txhawb nqa tseem tsis tau xa lossis tseem tos, thov kom thim rov qab. Qhov no tuaj yeem ua tau los ntawm kev mus xyuas qhov chaw nyob ze ntawm US Citizenship and Immigration Services (USCIS) los yog los ntawm ceeb toom rau lub koom haum sau ntawv ntawm koj qhov kev xavkom thim koj qhov kev txhawb nqa.
Cov khoom nqa nqa puas yuav kho qhov tuag wobble?
nqa thiab tsheb loj dua muaj me ntsis ua rau tuag wobble. Tsuav yog cov log tsheb sib npaug (thiab lawv yuav tsum ua kom zoo tag nrho) thiab koj cov kauj ruam yog qhov zoo, nws yuav tsum tsis txhob muaj kev tuag wobble. Kev tuag puas tuaj yeem kho tau?
Qhov twg yog qhov loj tshaj ntawm nqa tau tsim los ntawm aerofoil?
Ntawm lub hom phiaj dav dav aerofoil qhov loj tshaj plaws ntawm Lift tshwm sim rau saum npoo (qhov twg nws nkhaus tshaj plaws). Feem ntau hais txog 80% ntawm nqa tau tshwm sim ntawm lub tis saum npoo. Nqa yog proportional rau square ntawm airspeed.
Kev txhawb nqa menyuam puas tuaj yeem kuaj xyuas kev txhawb nqa?
Koj qhov kev txhawb nqa thib peb tsis tuaj yeem txeeb tsis tau los them nyiaj yug menyuam. Raws li Txoj Cai CARES txij thaum Lub Peb Hlis 2020, koj thawj qhov kev kuaj xyuas tuaj yeem txeeb los ntawm lub xeev thiab tsoomfwv cov koomhaum los them rau yav dhau los - them nyiaj yug menyuam.
