Effect of Some Inorganic Nitrate Salts on the Ignition Delay Time of DMAZ-IRFNA and DMAZ-WFNA Bi-propellants

• Autorzy: Pakdehi S. G. , Shirzadi B.

Identyfikatory

DOI

10.22211/cejem/81045

• Języki publikacji: EN

Abstrakty

EN

Dimethylaminoethyl azide (DMAZ) is a good replacement for the hydrazine group in the space industry. However, it has a relatively long ignition delay time with the liquid oxidizer, white fuming nitric acid (WFNA), and is nonhypergolic with inhibited red fuming nitric acid (IRFNA). In this article, the ignition delay times of DMAZ-WFNA and DMAZ-IRFNA bi-propellants were reduced by the addition of some inorganic nitrate salts, such as NH4NO3, KNO3, NaNO3, AgNO3 and LiNO3, to the liquid oxidizers. The results showed that WFNA containing 0.1 wt.%, 0.3 wt.% and 0.5 wt.% of LiNO3 reduced the ignition delay time of DMAZ-WFNA from 88 ms to 18 ms, 14 ms and 8 ms, respectively. The same percentages of LiNO3 caused the nonhypergolic DMAZ-IRFNA bi-propellant to have ignition delay times of 42 ms, 34 ms and 22 ms, respectively. Moreover, calculations indicated that the addition of LiNO3 to both oxidizers did not have a significant affect on the specific impulse of the bi-propellants. Consequently LiNO3 could be an appropriate additive for the reduction of the ignition delay times of DMAZ-WFNA and DMAZ-IRFNA bi-propellants.

Słowa kluczowe

EN

DMAZ; liquid oxidizers; ignition delay time; inorganic nitrate salts; specific impulse

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2018
• Tom: Vol. 15, no. 1
• Strony: 162--174
• Opis fizyczny: Bibliogr. 38 poz., rys., tab.

Twórcy

autor

Pakdehi S. G.

• Faculty of Chemical Engineering, Malek Ashtar University of Technology, P.O. Box: 16765/3454, Tehran, Iran

autor

Shirzadi B.

• Faculty of Chemical Engineering, Malek Ashtar University of Technology, P.O. Box: 16765/3454, Tehran, Iran

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).