METHOD OF PREDICTION OF PARAMETERS OF PLASMA JET STATIONARY ENGINE IN THE COURSE OF EXPIRATION OF SERVICE LIFE Russian patent published in 2005 - IPC

FIELD: space engineering; ground tests and operation in space of plasma jet engines and electric jet engine plants.

SUBSTANCE: proposed method includes performance of shortened endurance tests which are part of total service life; in conducting these tests, erosion of discharge chamber (δ_t), change in thrust at the beginning (F_o) and in the course (f_t) of shortened endurance tests are measured, regressive analysis for determination of approximating dependences is performed in form of monotonic function of erosion of discharge chamber and thrust versus time of operation; prediction of behavior of thrust is performed by definite dependence F_t=f(F_o, t), at the beginning of shortened tests and in the course of conducting these tests erosion areas (S_o, S_t) are additionally determined; approximating dependence of erosion area versus time S_t=f(t) and functional dependence of thrust versus erosion area F=f(k,S) are determined by regressive analysis, where k is proportionality factor between thrust and erosion area which are taken into account in prediction of thrust behavior during total service life; thrust is determined by dependence F_t=f(F_o, k,.S_t, S_o)

EFFECT: enhanced accuracy of prediction of parameters of stationary plasma jet engine.

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