Isingeniso kuma-Airplane Propellers
Umhlaba wezindiza uyaqhubeka nokumangala ngemishini yawo eyinkimbinkimbi kanye nobulula obuhle besayensi yawo. Enhliziyweni yendiza evamile, umuntu angathola ngokuvamile uphephela wendiza, ingxenye ebalulekile ebhekele ukuphosa lokho kuyisa indiza phambili. Lo mhlahlandlela uzodingida ingqikithi yophephela bezindiza, ukhanyise indima yabo eyisisekelo kanye nobunkimbinkimbi bokusebenza kwabo.
Umlando wophephela bezindiza usukela ezinsukwini zokuqala zezindiza, lapho amaphayona afana ne Abafowethu bakaWight ihlolwe ngezindlela zokuphehla. Kusukela lapho, ukuvela kophephela kuye kwafana nokuthuthuka kobuchwepheshe bezindiza. Ngisho nokukhuphuka kwezinjini zejethi, ophephela bahlala bebalulekile ezimweni eziningi zezindiza, ikakhulukazi ezincane, indiza ye-piston-injini.
Ukuqonda ukumakhenikha nokuklama kophephela bendiza kubalulekile kunoma ubani obambe iqhaza embonini, kungakhathaliseki ukuthi abashayeli bezindiza, onjiniyela, noma abathanda. Lo mhlahlandlela uhlose ukunikeza umbono obanzi, uqinisekisa ukuthi abafundi babamba izisekelo futhi bayakwazisa isayensi eguquguqukayo eyenza lezi zingxenye zikwazi ukuqhubeka nokundiza.
Okuyisisekelo Kweziphepheli Zezindiza
Ophephela bezindiza bangase babonakale beyizakhiwo ezilula, kodwa bawumkhiqizo womklamo oyinkimbinkimbi nobunjiniyela. I-propeller empeleni iyinhlangano i-airfoil, okufana nephiko, okuthi uma lizungeza, lidale umehluko kumfutho womoya. Lo mehluko engcindezini udala ukusunduza, kuqhubekisela indiza phambili.
I-propeller blade ngayinye yenziwe ngokucophelela ukuze kuqinisekiswe ukusebenza kahle okuphezulu. Ukuma, usayizi, kanye ne-engeli - noma 'i-pitch' - yama-blades yizo zonke izici ezinquma ukuthi uphephela ungaguqula ngempumelelo amandla enjini abe yi-thrust. Izinto ezisetshenziselwa ukwakha ophephela ziye zashintsha ngokuhamba kwesikhathi, zishintsha ukusuka okhunini kuye kwensimbi futhi manje kuya ezintweni eziyinhlanganisela ezinikeza amandla, ukuqina, kanye nesisindo esincishisiwe.
Ngaphezu kwama-blades, ihabhu le-propeller liyingxenye ebalulekile. Isebenza njengendawo yokuxhumana emaphakathi yezindwani futhi inamathisele uphephela enjinini yendiza. Ihabhu kumele imelane namandla asetshenziswa ngesikhathi sokusebenza futhi yakhelwe ukubhekelela izidingo ezahlukahlukene zokukhweza nokusebenza.
Isayensi Engemuva Kweziphepheli Zezindiza
Ukusebenza kophephela bendiza kulawulwa yi izimiso ze-aerodynamic. Lapho injini iphendula uphephela, inkemba ngayinye ihamba emoyeni futhi ikhiqize ukuphakama, okufana nendlela uphiko olukhiqiza ngayo i-lift. Lokhu kuphakanyiswa, okuqondiswe ohlangothini lokuzungezisa, kuhumusheka ku-thrust ngenxa ye-engeli etshekile yama-blades.
Isimiso sikaBernoulli idlala indima ebalulekile ekusebenzeni kophephela. Ithi ukwanda kwejubane loketshezi kwenzeka kanyekanye nokuncipha kwengcindezi. Njengoba ama-propeller blades ejikeleza, asheshisa umoya, enze indawo enengcindezi ephansi phambi kophephela kanye nendawo enomfutho omkhulu ngemuva kwawo. Lo mehluko wengcindezi uphushela indiza phambili.
Ukusebenza kahle kwe-propeller kuphinde kuthonywe umqondo 'we-engeli yokuhlasela,' okuyi-engeli ephakathi komugqa we-chord weblade nomoya ohlobene. I-engeli ye-blade yokuhlasela kufanele ithuthukiswe ukuze kuvinjwe izimo ezingezinhle ze-aerodynamic ezifana nesitebele, lapho ukugeleza komoya kuhlukana nendawo ye-blade futhi kunciphisa kakhulu ukusebenza kahle.
Izinhlobo zama-Airplane Propellers
Ukuhlukahluka ekwakhiweni kuveza indawo yophephela bendiza, ngohlobo ngalunye oluvunyelaniswa nezinhlelo ezithile nezici zenjini. Ophephela abangagxili, okuyifomu elilula kakhulu, banama-blade asethwe nge-engeli engaguquki. Lezi zivamile ezindizeni ezilula ngenxa yobulula bazo kanye nokusebenza kahle kwezindleko.
Ngakolunye uhlangothi, ama-variable-pitch propeller, avumela umshayeli wendiza ukuthi alungise i-blade pitch ukuze ivumelane nezimo zendiza. Lokhu kuvumelana nezimo kungaholela ekusebenzeni okuthuthukisiwe, ukusebenza kahle kukaphethiloli, kanye nekhono lokugcina i-RPM yenjini esezingeni eliphezulu kuzo zonke izimo. Ophephela besivinini esingaguquguquki, uhlobo oluncane lwama-variable-pitch propeller, balungisa ngokuzenzakalelayo ukuphakama ukuze kugcinwe i-RPM engaguquki, enikeza ukusebenza kahle okwengeziwe kanye nezinzuzo zokusebenza.
Ophephela abanezimpaphe bangolunye uhlobo, olwakhelwe ngokuyinhloko izindiza ezinenjini eningi. Esimeni lapho injini ingaphumeleli khona, lawa ma-propeller angalungiswa abe endaweni enciphisa ukudonsa kwe-aerodynamic, esiza ekugcineni ukulawula nokwandisa isikhathi sokushwibilika.
Indlela Ama-Aeroplane Propellers Asebenza ngayo
Ukusebenza kophephela bendiza kuyi-symphony yefiziksi nobunjiniyela, ehumusha ukunyakaza okuzungezisayo kube ukunyakaza okuqondile kwe-thrust. Lapho umshayeli elungisa i-throttle, injini ikhipha amandla engeziwe, okubangela ukuba uphephela ujikeleze ngesivinini esiphezulu. Njengoba ijubane lokujikeleza likhuphuka, kanjalo nesivinini somoya siyanyakaza, okuholela ekududuleni okukhulu.
Ophephela be-variable-pitch kanye nesivinini esingaguquki, umshayeli wendiza noma umbusi ozenzakalelayo angakwazi ukulungisa ukuphakama kwe-blade. Ngokwandisa i-pitch, ama-blades ahlangana nomoya nge-engeli enkulu, engakhuphula i-thrust kodwa idinga amandla enjini engeziwe. Ngakolunye uhlangothi, ukwehlisa iphimbo kunciphisa i-engeli nomthwalo enjini, okungaba usizo ngesikhathi sokuhlela amandla aphansi njengokwehla.
Ukusebenza kahle kwendiza kaphephela ngokuvamile kukalwa ngesilinganiso sawo kusengaphambili, okuyisilinganiso sejubane lendiza eliya phambili nelephuzu likaphephela. Abaklami bahlose ukuthuthukisa lesi silinganiso ukuze sihambisane nezici zokusebenza ezifiselekayo endizeni ethile.
Ukubaluleka Kophephela Bezindiza Endizeni
Ophephela bezindiza bangaphezu nje kokuphotha izindwani; zibalulekile ezicini eziningana zokundiza. Phakathi nokusuka, banikeza umfutho odingekayo ukuze banqobe inertia nokuhudula, okuvumela indiza ukuthi ifinyelele isivinini esidingekayo ukuze iphakame. Endizeni yohambo, ophephela kufanele balethe ukusebenza okungaguquki ukuze banakekele engamamitha futhi isivinini somoya.
Ukuguquguquka kwezinto ezihlukahlukene zophephela kubonakala nasekubambeni kwabo ekuhambiseni indiza. Ngokushintsha amaleveli ama-thrust futhi, endabeni yophephela abashintshashintshayo, belungisa ama-engeli e-blade, abashayeli bezindiza bangakwazi ukulawula ukukhuphuka kwendiza, ukwehla, nesivinini ngokunemba. Lokhu kuvumelana nezimo kubaluleke kakhulu phakathi nezigaba ezifana nokufika, lapho ukulawula isivinini kanye nezinga lokwehla kubalulekile.
Ezindizeni ezinezinjini eziningi, ophephela bafaka isandla ekuphepheni. Uma injini yehluleka, ikhono lokuphamba uphephela enjinini engasebenzi kungaba isici esisindisa ukuphila. Inciphisa ukuhudula futhi ivumele ukulawula okungcono njengoba indiza ilinyelwa endaweni ephephile nezinjini ezisebenzayo ezisele.
Ukuqonda Imishini Yeziphepheli Zezindiza
Ukujula kumishini yophephela bendiza kuveza ukusebenzisana okuyinkimbinkimbi phakathi kwamandla ahlukahlukene nezinto zomklamo. I-twist ngobude be-propeller blade ayifani; iyancipha ukusuka kuhabhu kuya ekugcineni. Lo mklamo uqinisekisa ukuthi ingxenye ngayinye ye-blade inikela ngokulinganayo ekuphonseni, njengoba ithiphu lihamba ngokushesha kunempande futhi lingase likhiqize ukuphakama okungalingani.
Isenzeko 'se-propeller slipstream' esinye isici esibalulekile semishini yophephela. Ukuzungezisa ama-propeller blades kudala iphethini ezungezayo yokugeleza komoya eyaziwa ngokuthi i-slipstream, engaba nomthelela ekusebenzeni kwendiza yendiza, ikakhulukazi ezindaweni zomsila. Abashayeli bezindiza kufanele baqonde futhi balindele le miphumela ukuze balondoloze ukulawula okushelelayo.
I-torque ne-P-factor amandla engeziwe aqala ukudlala. I-torque ukuthambekela kokuthi indiza igingqike iye kolunye uhlangothi lokuzungezisa kukaphephela ngenxa Umthetho wesithathu kaNewton. I-P-factor, noma umphumela we-asymmetric blade, yenzeka lapho indiza ikwi-engeli ephezulu yokuhlasela, okubangela ukuthi uhlangothi olulodwa lwediski lophephela lukhiqize ukushuba okungaphezulu kunolunye. Ukunxephezela lawa mandla kuyingxenye yesethi yamakhono omshayeli wendiza.
Ukugcinwa Nokuphepha Kophephela Bezindiza
Ukusebenza kahle nokuthembeka kophephela bendiza kuncike ekunakekeleni okucophelela kanye nokubambelela ezimisweni zokuphepha. Ukuhlola okuvamile kubalulekile ukuze kuhlonzwe futhi kulungiswe noma yiziphi izinkinga ezinjengama-nick, ama-dent, ukugqwala, noma ukuqhekeka okungafaka engozini ubuqotho besakhiwo sama-blades noma ihabhu.
Ukulinganisa kungenye inqubo yokulondoloza ebalulekile. Uphephela ongalinganiseli ungaholela ekudlidlizeni okungagcini nje ngokubangela ukungakhululeki kodwa futhi okungaholela ekuhlulekeni komshini kwenye indawo endizeni. Ukulinganisa kuhlanganisa ukulungisa ukusabalaliswa okukhulu kwe-propeller ukuze ijikeleze kahle ngaphandle kokubangela ukucindezelwa okungadingekile enjinini nakuhlaka lomoya.
Ukuthobela izinkombandlela zomkhiqizi kanye nemithetho yezokushayela kwezindiza akunakuxoxisana. Lezi zibeka izindinganiso zezikhawu zokulungisa, izinqubo zokulungisa kabusha, kanye nemikhawulo yokusebenza. Ukuqeqeshwa kwezisebenzi zokunakekela kubalulekile ngokulinganayo ukuze kuqinisekiswe ukuthi wonke umuntu ohilelekile ekunakekeleni ophephela bezindiza uhlome ngolwazi lwakamuva namakhono.
Amasu amasha ku-Airplane Propeller Technology
Umkhakha wobuchwepheshe be-propeller yendiza awumile; iyaqhubeka nokuguquguquka, iqhutshwa ukufuna ukusebenza kahle okukhulu, ukusebenza, nokunciphisa umsindo. Izinto ezihlanganisiwe zihamba phambili kulokhu kuguquguquka, zinikeza ukonga isisindo kanye ne-aerodynamics ethuthukisiwe kuyilapho kugcinwa amandla nokuqina.
Intuthuko ekwakhiweni nasekukhiqizeni okusizwa ngamakhompiyutha iholele ekubunjweni kophephela okunembe kakhudlwana, okuklanyelwe izidingo ezithile zokusebenza. Ukuqanjwa okusha okufana nama-blade amise okwe-scimitar, ajika abheke ekugcineni, abonise isithembiso ekwehliseni umsindo nasekuthuthukiseni ukusebenza kahle.
Ukufakwa kukagesi kwezinhlelo zokuqhubela phambili kungenye indawo yokuthuthukiswa. Amamotho kagesi angenza amandla ophephela, avule indlela yezinye izindlela ezithule, ezihlanzekile kunezinjini ezivuthayo ezivamile. Lobu buchwepheshe busencane kodwa bunamandla amakhulu ekusasa lendiza.
Isiphetho
Njengoba sibheke emkhathizwe wezokundiza, ukubaluleka kophephela bezindiza kusalokhu kungancipha. Ziwubufakazi bobuhlakani bonjiniyela besikhathi esidlule nabamanje kanye nengxenye ebalulekile esikhathini esizayo sendiza. Ucwaningo oluqhubekayo nentuthuko ithembisa ukuletha izinto ezintsha ezizothuthukisa ukusebenza kahle kophephela, kunciphise umthelela wendawo, futhi kuthuthukise ukuphepha.
Uhambo olusuka emiklamo engajwayelekile yasekuqaleni kwekhulu lama-20 ukuya ezinhlelweni eziyinkimbinkimbi zanamuhla luyindaba ephawulekayo yenqubekelaphambili. Ngokuthuthuka kwezinto zokwakha kanye nobuchwepheshe, kuhambisana nokuqonda okujulile kwe-aerodynamics, ophephela bezindiza bazoqhubeka nokuba yinto ebalulekile emkhakheni wezokundiza.
Xhumana nethimba le-Florida Flyers Flight Academy namuhla ku (904) 209-3510 ukuze ufunde kabanzi mayelana ne-Private Pilot Ground School Course.
