Development of a method for selecting a cruising mode and engine control program of a ramjet aircraft

For supersonic cruising, combined power plants can be used, in which a gas turbine engine reaches the cruising mode, and ramjet is used for cruising. Supersonic transoceanic flights are characterized by long segment, decisive terms of required fuel mass. Therefore, selection operation parameters an important task. As rule, when selecting range parameter depends on flight modes. To take into account influence operating mode parameter, dimensionless relationships with control factors were obtained. Using obtained together equations aircraft motion steady horizontal flight, it shown that values do not change at altitudes 11...20 km. This made possible to conclude increased only provide minimum specific consumption. The variable speed initial altitude. A method was developed, based analysis relationship between altitude most advantageous factors. allow taking restrictions. It consumption decreases 0...30 %, depending program optimized