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A. F. Latypov 《Thermophysics and Aeromechanics》2009,16(1):1-11
The fuel economy was estimated at boost trajectory of aerospace plane during energy supply to the free stream. Initial and
final velocities of the flight were given. A model of planning flight above cold air in infinite isobaric thermal wake was
used. The comparison of fuel consumption was done at optimal trajectories. The calculations were done using a combined power
plant consisting of ramjet and liquid-propellant engine. An exergy model was constructed in the first part of the paper for
estimating the ramjet thrust and specific impulse. To estimate the aerodynamic drag of aircraft a quadratic dependence on
aerodynamic lift is used. The energy for flow heating is obtained at the sacrifice of an equivalent decrease of exergy of
combustion products. The dependencies are obtained for increasing the range coefficient of cruise flight at different Mach
numbers. In the second part of the paper, a mathematical model is presented for the boost part of the flight trajectory of
the flying vehicle and computational results for reducing the fuel expenses at the boost trajectory at a given value of the
energy supplied in front of the aircraft.
Sections, formulas, and figures have a numbering continued from the first part of the paper printed in the journal “Thermophysics
and Aeromechanics”, 2008, Vol. 15, No. 4, P. 537–548. 相似文献