EFFECT OF THE GASDYNAMICS OF A 2-REGIME COMBUSTOR ON THE POWER CHARACTERISTICS OF A MODEL WITH COMBUSTION

Methods are analyzed for increasing the propulsive thrust-efficiency c haracteristics of the internal duct of a gasdynamic model with combust ion by means of boosting the operational process stage. At a Mach numb er 5 and a stagnation temperature between 1200 and 1500 K and 35-40 MP a stagnation pressures we investigated the effect of the degree of com bustor expansion (F) over bar(c) on the propulsive thrust-efficiency c haracteristics of a small model operating on hydrogen fuel with an air excess coefficient of 1. The calculated predictions of the increase i n the model characteristics on account of a reduced (F) over bar(c) we re confirmed experimentally. When the combustor operates in a regime, where the heat is being supplied to a subsonic flow, it is possible on priciple to reduce (F) over bar(c) to a minimum determined by the flo w gas thermodynamics in the combustor.