Cov dav hlau yog tsib npaug nrawm dua lub suab
US Air Force npaj tsim lub dav hlau ua haujlwm raws li tus qauv hypersonic X-51 Waverider, tau sim li ob xyoos dhau los hauv dej hiav txwv Pacific. Raws li DARPA cov kws tshaj lij ua haujlwm ntawm qhov project, thaum ntxov li xyoo 2023, cov qauv siv tau ntawm lub dav hlau dav hlau nrog ceev tshaj Mach XNUMX tuaj yeem tshwm sim.
X-51 thaum lub sij hawm sim davhlau ntawm qhov siab ntawm 20 meters mus txog qhov ceev tshaj 6200 km / h. Nws scramjet tau tswj kom nrawm mus rau qhov nrawm no thiab tuaj yeem tau nyem tawm ntau dua, tab sis khiav tawm ntawm roj. Tau kawg, Asmeskas tub rog tab tom xav txog cov txheej txheem no tsis yog rau pej xeem, tab sis rau kev ua tub rog.
Lub Scramjet (luv luv rau Supersonic Combustion Ramjet) yog lub tshuab hluav taws xob supersonic dav hlau uas tuaj yeem siv tau ntawm qhov nrawm tshaj li ntawm cov pa ramjet. Lub dav hlau ntawm huab cua ntws mus rau hauv lub inlet diffuser ntawm lub tshuab dav hlau supersonic ntawm qhov ceev tshaj qhov ceev ntawm lub suab, yog decelerated, compressed, thiab converts ib feem ntawm nws kinetic zog rau hauv tshav kub, ua rau kom kub. Tom qab ntawd cov roj tau ntxiv rau hauv chav combustion, uas kub hnyiab hauv cov kwj deg, tseem txav ntawm qhov nrawm nrawm, uas ua rau nws qhov kub thiab txias ntxiv. Nyob rau hauv lub expanding nozzle, lub dav hlau expands, cools thiab accelerates. Thrust yog qhov tshwm sim ncaj qha los ntawm lub siab system uas tsim nyob rau hauv lub cav, thiab nws qhov loj yog proportional rau qhov kev hloov ntawm lub sij hawm ntawm tus nqi ntawm cov lus tsa suab ntws los ntawm lub cav cua.
