Dav Hlau vs Rocket Engine
Lub dav hlau thiab foob pob ua ntxaij cav yog cov tshuaj tiv thaiv raws li Newton txoj cai thib peb. Lub tshuab foob pob hluav taws kuj tseem yog lub tshuab dav hlau nrog qee qhov kev hloov pauv ntawm ob. Lub thrust ntawm ob yog los ntawm qhov ceev ntawm qhov tso tawm ntawm lub cav. Cov pa tawm ntawm lub tshuab foob pob hluav taws mus txog qhov nrawm ntawm sonic ze ntawm lub caj pas ntawm lub nozzle, thiab qhov nthuav dav hauv lub nozzle ntxiv rau qhov nrawm, muab lub dav hlau tso tawm hypersonic. Lub tshuab dav hlau siv cua thiab roj rau kev sib tsoo, thiab ua haujlwm ntawm subsonic lossis sonic speeds. Lub tshuab dav hlau tsuas yog ua haujlwm hauv huab cua, qhov foob pob hluav taws tuaj yeem ua haujlwm hauv lub tshuab nqus tsev thiab hauv huab cua. Lub tshuab dav hlau siv cov pa oxygen rau combustion los ntawm huab cua tab sis foob pob hluav taws muaj lawv tus kheej oxygen.
Rocket Engine
Lub tshuab foob pob hluav taws, lossis tsuas yog " foob pob hluav taws," yog ib hom dav hlau lub cav uas siv lub tshuab hluav taws xob nkaus xwb, uas tsim cov pa roj rau kev tsim nws lub dav hlau ceev ceev uas tau hais los ntawm lub nozzle los tsim lub tshuab foob pob hluav taws.. Feem ntau ntawm lawv yog cov tshuab hluav taws xob sab hauv, thiab tsis yog siv cov khoom siv sab nraud los tsim lub dav hlau lawv siv cov pa tawm los ntawm IC xyaw. Qhov siab tshaj plaws tso tawm ntawm cov dav hlau yog los ntawm lub foob pob hluav taws cav.
Lub hauv paus tseem ceeb ntawm kev ua haujlwm ntawm lub foob pob hluav taws cav tau muab faib ua peb yam tseem ceeb, thiab txawv me ntsis nrog rau hom kev siv hluav taws xob. Ua ntej yog lub tshuab hluav taws xob hluav taws xob los yog cua sov, uas ua rau cov pa tso pa tawm, qhov thib ob yog, dhau los ntawm lub tshuab hluav taws xob supersonic, uas yuav pab ua kom cov pa tso pa tawm mus rau kev kub ceev uas siv lub zog kub ntawm cov roj nws tus kheej. Tom qab ntawd lub cav raug thawb mus rau qhov sib txawv, raws li cov tshuaj tiv thaiv rau cov pa ntws tawm. Qhov no muab cov thermodynamic efficiency zoo dua raws li qhov kub thiab txias. Nws yog vim hais tias ntawm qhov kub thiab txias lub sonic ceev heev heev. Sonic tshaj tawm yog roughly proportional rau square ntawm qhov kub thiab txias ntawm lub tso pa.
Kev tsim kho lub tshuab foob pob hluav taws nyob ntawm hom kev siv lub tshuab. Ntau lub cav yog cov tshuab hluav taws xob sab hauv, uas siv cov khoom siv hluav taws xob sib xyaw ntawm cov roj thiab cov khoom siv oxidizing, los yog kev sib xyaw ua ke ntawm cov khoom thiab cov kua, los yog gaseous propellants. Lwm hom yog cua sov cov tshuaj inert cov tshuaj tiv thaiv huab hwm coj siv lub zog hluav taws xob siab ntawm lub tshuab hluav taws xob.
Jet Engine
dav hlau cav muaj ntau yam xws li kiv cua, compressor, combustor, turbine, tov khoom, thiab nozzle. Qhov muaj thiab kev npaj ntawm cov khoom no ua ke nrog lub tshuab tsav tsheb muab ntau hom dav hlau tshuab. Lub cav nqus cua thiab compress nws hauv lub compressor. Tom qab ntawd cov compressed thiab rhuab cua yog xa mus rau lub combustor thiab sib tov nrog roj thiab hlawv. Cov pa xa mus rau lub turbine los tsim lub zog tsav lub cav.
Cov hom dav hlau muaj xws li: ramjet, turbojet, turbofan, turboprop thiab turbo ncej. Lub hauv paus tseem ceeb ntawm kev ua haujlwm ntawm txhua lub cav yog zoo ib yam nrog cov kev zam hauv qab no. Nyob rau hauv turbofan, ib feem ntawm compressed cua yog pub ncaj qha mus rau lub turbine. Txawm hais tias nws tsis yog rhuab raws li cov pa tawm los ntawm lub combustor, nws nqa cov huab cua siab thiab yog li, pab txhawb rau ib feem loj rau tag nrho cov thrust. Hauv turboprop thiab turbofan, thrust yog tsim los ntawm lub kiv cua ib yam nkaus. Nyob rau hauv turbo kiv cua, tag nrho cov thrust yog tsim los ntawm ib tug kiv cua raws li peb pom nyob rau hauv lub nyoob hoom qav taub.
Dav Hlau vs Rocket Engine
– Cov foob pob hluav taws yog siv rau kev siv dav hlau thiab cuaj luaj.
– Kev siv dav hlau feem ntau yog hauv kev lag luam thauj khoom thiab tuaj yeem pom nrog cov tub rog dav hlau, dav hlau, tsheb ceev, nkoj thiab nkoj ib yam nkaus. Lwm yam kev siv yog nyob rau hauv cruise missiles thiab unmanned aerial tsheb (UAV).
– Lub tshuab foob pob hluav taws tsawg kawg yog lub zog siv dav hlau.
– Lub suab nrov yog siab dua nrog lub foob pob hluav taws cav piv nrog lub tshuab dav hlau.
– Lub dav hlau dav hlau yog qhov nyuaj rau lub tshuab foob pob hluav taws.
