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FME Transactions
2013, vol. 41, br. 2, str. 114-119
jezik rada: engleski
vrsta rada: neklasifikovan

Eksperimentalno određivanje derivativa stabilnosti na modelu protivtenkovske rakete u podzvučnoj oblasti brzina
aMilitary Technical Institute, Belgrade
bUniverzitet u Beogradu, Mašinski fakultet

e-adresa: majasam@ptt.rs

Sažetak

Jedan od najsloženijih zadataka u toku razvoja novih letelica (aviona i raketa) jeste određivanje karakteristika stabilnosti i upravljivosti. Najbolji način za određivanje derivativa stabilnosti na modelima letelica jeste izvođenje eksperimenata u aerotunelima u kojima se mogu ostvariti visoki Rejnoldsovi brojevi. U aerotunelu T-38 za merenje derivativa stabilnosti koristi se metoda krutih prinudnih oscilacija. Ova metoda omogućava određivanje prigušnih, unakrsnih i unakrsno-spregnutih derivativa stabilnosti. U ovom radu prikazani su rezultati eksperimentalnog određivanja prigušnog derivativa stabilnosti u valjanju na modelu protivtenkovske rakete. Model je projektovan i izrađen u Vojnotehničkom institutu Beogradu. Merenje prigušenja u valjanju urađeno je na sledećim Mahovom brojevima: 0.2; 0.4 i 0.6. U eksperimentima je korišćen uređaj sa primarnim oscilatornim kretanjem oko uzdužne ose modela. Koeficijent prigušnog derivativa stabilnosti izmeren u aerotunelu T-38 upoređen je sa vrednostima dobijenim polu-empirijskom metodom DMAC.

Ključne reči

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